Re: [Emc-users] SSR Issues, Thyristor dv/dt
We have been the victim of counterfeit Fotek SSR units. They looked fine, but required over 6 volts input to turn them on. That of course does not work with logic signals driving them. Now we test all of them before selling them. What a pain. Steve Stallings www.PMDX.com > -Original Message- > From: andy pugh [mailto:bodge...@gmail.com] > Sent: Wednesday, May 04, 2016 6:38 AM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] SSR Issues, Thyristor dv/dt > > On 4 May 2016 at 02:38, Jon Elson <el...@pico-systems.com> wrote: > > OH WELL, there you have it! A 16 A triac in a 40 A labeled > > SSR! If there's one bogus thing in a device, you can depend > > on the WHOLE thing having bogus engineering. > > Here is an analysis of one from bigclive: > https://www.youtube.com/watch?v=DxEhxjvifyY > Though mine did not have any potting resin in it, either. > > From what I can gather Fotek are a reasonably reputable company, but > are being heavily counterfeited. The fact that mine were constructed > differently from the one in the video rather suggests that mine are > counterfeit, even if the one in the video isn't. The one in the video > is 100% over-rated, whereas mine was 150% over-rated. > > Not that that actually explains the failure. The devices have not been > asked to pass more than 2A so far. > > -- > atp > "A motorcycle is a bicycle with a pandemonium attachment and is > designed for the especial use of mechanical geniuses, daredevils and > lunatics." > - George Fitch, Atlanta Constitution Newspaper, 1916 > > -- > > Find and fix application performance issues faster with > Applications Manager > Applications Manager provides deep performance insights into > multiple tiers of > your business applications. It resolves application problems > quickly and > reduces your MTTR. Get your free trial! > https://ad.doubleclick.net/ddm/clk/302982198;130105516;z > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Find and fix application performance issues faster with Applications Manager Applications Manager provides deep performance insights into multiple tiers of your business applications. It resolves application problems quickly and reduces your MTTR. Get your free trial! https://ad.doubleclick.net/ddm/clk/302982198;130105516;z ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Any Interest or Ideas for a Linuxcnc Fest, 2016 ?
The area around Tech Shop and the Best Western is modern suburbia, nothing like downtown Detroit. The Best Western itself is an old school full service large motel complex. Well maintained but looks like something from the 1980s era. Location is not walkable except for the on site restaurant and other facilities. A few minutes by car gets you to shopping malls and such. There are many places to stay near the airport for prices in the mid 50s but they are 20 minutes away and offer only the basics. The facility at Tech Shop is great. It is a former Ford Motor Company training center. Modern, lots of space, power, internet, and free coffee during the show. There is a machine shop that is fairly well equipped, but you must make arrangements if you need to use it because it runs as a traditional Tech Shop site. Many in the crowd last year were folks that I have seen at the previous CNC Workshops going all the way back to the original shows at Roland's place. If you are close by, I highly recommend dropping in Saturday morning as it is free then. http://www.thecncworkshop.com/ Regular admission with seminars is $125 but if you want to be an exhibitor (non-commercial) you can bring stuff to show and demonstrate and this will get you $50 off of admission. Steve Stallings > -Original Message- > From: Jim Craig [mailto:jimcraig5...@windstream.net] > Sent: Monday, May 02, 2016 9:13 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Any Interest or Ideas for a Linuxcnc > Fest, 2016 ? > > I would like to come to the workshop and I could possibly > present. If we > are coming as a presenter do we register as a student on the webpage? > > I see the Best Western Greenfield Inn is close by. Has anybody stayed > there. Is this a good part of town to stay overnight? I am totally > unfamiliar with the greater Detroit area. > > I am not sure I can make it for Wednesday thru Saturday. I > might be able > to make it for Thursday and Friday. > > Jim > > > > On 5/2/2016 6:08 PM, Ron Ginger wrote: > > I would really like to see more linuxCNC presence at the > workshop. So > > far Jon Elson and Bob Luken have agreed to do a session on > LinuxCNC, but > > I could make a lot more room for Linux sessions. I have > several slots on > > Friday which I want to be 'how I did my system' talks by > users. There is > > room in the techShop to have a linux area. There will be a > few vendors- > > Tormach included. > > > > We have set Saturday as a free open to the public day to a > swap meet and > > the vendor displays. > > > > This is not that big of an event- it is really the > continuation of what > > started at Rolands shop in Galesburg IL several years ago > where linux > > had a huge presence. > > > > ron ginger > > > > > > On 5/2/2016 2:24 PM, emc-users-requ...@lists.sourceforge.net wrote: > >> On 05/02/2016 10:27 AM, bari wrote: > >> > >> I'd like that very much. > >> > >> > >>>> Any ideas where to hold it? Are there any other events > this summer with > >>>> overlapping interests? > >> There's "The CNC Workshop 2016", June 8-16 in Detroit: > >> http://www.thecncworkshop.com/ > >> > >> That seems like a big expo with vendors and classes and > things (which is > >> important for project visibility), though i prefer a more focused > >> developer-centric hackfest like what we did at Tx/Rx. > >> > >> > >> -- Sebastian Kuzminsky > > > > > -- > > > Find and fix application performance issues faster with > Applications Manager > > Applications Manager provides deep performance insights > into multiple tiers of > > your business applications. It resolves application > problems quickly and > > reduces your MTTR. Get your free trial! > > https://ad.doubleclick.net/ddm/clk/302982198;130105516;z > > ___ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > -- > > Find and fix application performance issues faster with > Applications Manager > Applications Manager provides deep performance insights into > multiple tiers of > your business applications. It resolves application problems > quickly and > reduces your MTTR. Get your free trial! > https://ad.doubleclick.net/ddm/clk/302982198;130105516;z > ___
Re: [Emc-users] Cheap servos
I expect it would take a lot of work to use them as an axis drive, but they make wonderful replacement spindle motors for small Chinese machines. Steve Stallings > -Original Message- > From: andy pugh [mailto:bodge...@gmail.com] > Sent: Thursday, September 03, 2015 6:14 AM > To: Enhanced Machine Controller (EMC) > Subject: [Emc-users] Cheap servos > > I wonder if these motor/drive combinations would work in a > CNC application? > http://www.ebay.co.uk/itm/141744001054 > > I imagine that they run trapezoidal commutation and have no encoders, > but that isn't an insurmountable issue. > > -- > atp > If you can't fix it, you don't own it. > http://www.ifixit.com/Manifesto -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] TB6600 Stepper Motor Drivers
Yes, you can cut the center taps free of each other and drive it full coil. You might also consider using half coil depending on how the motor responds. All the ones that I have seen are standard connectors that were hand soldered. Easily modified. Steve Stallings -Original Message- From: Dave Cole [mailto:linuxcncro...@gmail.com] Sent: Tuesday, June 23, 2015 12:00 AM To: emc-users@lists.sourceforge.net Subject: Re: [Emc-users] TB6600 Stepper Motor Drivers Hi Steve, I did not know that. Thanks for the info.So if I cut the center taps loose from pin 5 and insulate the individual center taps I should have all of the coil end connections in the 5 pin DIN plug and I can drive with with a standard bipolar driver? Unless they glued those DIN connectors together or they are molded on, that should not be a difficult modification.I don't have the machine as this is for my nephew. The machine is about 10 years old. Any idea if they were molding on the DIN connectors back then? Thanks, Dave On 6/22/2015 10:32 PM, Steve Stallings wrote: Are you aware that the original motors are 6 wire unipolar motors with the center taps connected together at the 5 pin DIN plug? While these motors can be used with a bipolar driver, rewiring will be necessary. Steve Stallings -Original Message- From: Dave Cole [mailto:linuxcncro...@gmail.com] Sent: Monday, June 22, 2015 10:05 PM To: emc-users@lists.sourceforge.net Subject: [Emc-users] TB6600 Stepper Motor Drivers Is anyone on the list using some of the TB6600 stepper motor drivers that are listed on Ebay? There are some 5A, 50 volt units that are selling for less than $15 each with free shipping from China or Hong Kong. I need to put together an inexpensive control box for a Sherline. The original control box was lost. Dave -- Monitor 25 network devices or servers for free with OpManager! OpManager is web-based network management software that monitors network devices and physical virtual servers, alerts via email sms for fault. Monitor 25 devices for free with no restriction. Download now http://ad.doubleclick.net/ddm/clk/292181274;119417398;o ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus -- Monitor 25 network devices or servers for free with OpManager! OpManager is web-based network management software that monitors network devices and physical virtual servers, alerts via email sms for fault. Monitor 25 devices for free with no restriction. Download now http://ad.doubleclick.net/ddm/clk/292181274;119417398;o ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Monitor 25 network devices or servers for free with OpManager! OpManager is web-based network management software that monitors network devices and physical virtual servers, alerts via email sms for fault. Monitor 25 devices for free with no restriction. Download now http://ad.doubleclick.net/ddm/clk/292181274;119417398;o ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] TB6600 Stepper Motor Drivers
Are you aware that the original motors are 6 wire unipolar motors with the center taps connected together at the 5 pin DIN plug? While these motors can be used with a bipolar driver, rewiring will be necessary. Steve Stallings -Original Message- From: Dave Cole [mailto:linuxcncro...@gmail.com] Sent: Monday, June 22, 2015 10:05 PM To: emc-users@lists.sourceforge.net Subject: [Emc-users] TB6600 Stepper Motor Drivers Is anyone on the list using some of the TB6600 stepper motor drivers that are listed on Ebay? There are some 5A, 50 volt units that are selling for less than $15 each with free shipping from China or Hong Kong. I need to put together an inexpensive control box for a Sherline. The original control box was lost. Dave -- Monitor 25 network devices or servers for free with OpManager! OpManager is web-based network management software that monitors network devices and physical virtual servers, alerts via email sms for fault. Monitor 25 devices for free with no restriction. Download now http://ad.doubleclick.net/ddm/clk/292181274;119417398;o ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Suitable transformers = hens teeth
-Original Message- From: Gregg Eshelman [mailto:g_ala...@yahoo.com] Sent: Sunday, June 14, 2015 4:12 AM snip If it has a 240 option on both primary and secondary, would not using the 240 taps on both make it a 1:1 so putting 120 in would get 120 out? Yes the voltage ration will hold. You can even swap the secondary and primary sides but there may be differences of a few percent because the listed voltages include a margin for internal losses. What you cannot safely do is exceed the current rating of any winding even though the total power is within specifications. This is because excess current can saturate the magnetic core which can result in suddenly lower impedance and bad things will happen. In the example that you gave, this would mean that you would only be able to safely get half as much power from the transformer. Steve Stallings -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)
-Original Message- From: andy pugh [mailto:bodge...@gmail.com] Sent: Sunday, June 14, 2015 5:06 AM snip What is the existing motor mount? I adapted my Mini-Mill to a standard 3-phase motor: https://picasaweb.google.com/lh/photo/Dk3wsS9o7XJ-N2kfUnESDtMT jNZETYmyPJy0liipFm0?feat=directlink Andy, that is a nice looking setup. I see what I think is a rotary joint in the head block. Is that factory or shop made? Is it essential to the clearance needed to mount the motor? What frame size is that motor? Steve Stallings -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] what causes stepper motor stall
Not even close. That motor is from a Compact 5 which is a table top lathe. It is a weird 48 step per revolution 2 phase motor. Wimpy and crude. The model 120 is about 8X the mass and uses 5 phase motors that are far smoother and significantly more powerful. Steve Stallings -Original Message- From: andy pugh [mailto:bodge...@gmail.com] Sent: Tuesday, May 05, 2015 8:39 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] what causes stepper motor stall On 5 May 2015 at 00:45, Tom Easterday tom-...@bgp.nu wrote: This is a Berger Lahr 596 5-phase stepper motor on the Z-axis of an EMCO 120P lathe Is it the same motor as this one? http://www.ebay.co.uk/itm/EMCO-COMPACT-5-CNC-LATHE-STEP-MOTOR- /271854301426?_trksid=p2056016.l4276 -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- One dashboard for servers and applications across Physical-Virtual-Cloud Widest out-of-the-box monitoring support with 50+ applications Performance metrics, stats and reports that give you Actionable Insights Deep dive visibility with transaction tracing using APM Insight. http://ad.doubleclick.net/ddm/clk/290420510;117567292;y ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Backlash - what are ok numbers?
What is this, a new take on measure twice - cut once. More like measure once... aw that doesn't look like enough -Original Message- From: Mark Wendt [mailto:wendt.m...@gmail.com] Sent: Tuesday, April 07, 2015 12:19 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Backlash - what are ok numbers? On Tue, Apr 7, 2015 at 12:07 PM, Karl Jacobs karl.jac...@gmx.de wrote: Then you must be the guy who can translate Gene Heskett's three fingers in a jelly glass of Jack, Black neat into acre-foot, which is one of the weirdest measure for volume I ever came across :-) Karl I usually pour two fingers worth of single malt into my whisky glass. My distance between my pinky and forefinger... ;-) Mark -- BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT Develop your own process in accordance with the BPMN 2 standard Learn Process modeling best practices with Bonita BPM through live exercises http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtua l- event?utm_ source=Sourceforge_BPM_Camp_5_6_15utm_medium=emailutm_campaign=VA_SF ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT Develop your own process in accordance with the BPMN 2 standard Learn Process modeling best practices with Bonita BPM through live exercises http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- event?utm_ source=Sourceforge_BPM_Camp_5_6_15utm_medium=emailutm_campaign=VA_SF ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] VFD causing limits to trip. Huh?
If one is trying to minimize radiated interference from a signal source, then grounding the shield at the source end makes sense. My suggestion of grounding the shield at the consumer of the signals was based on reducing the likelihood of a hostile external noise source confusing the consumer. Steve Stallings -Original Message- From: Przemek Klosowski [mailto:przemek.klosow...@gmail.com] Sent: Wednesday, March 18, 2015 11:12 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] VFD causing limits to trip. Huh? On Mon, Mar 16, 2015 at 11:34 AM, Peter Blodow p.blo...@dreki.de wrote: Steve, this is a good description of noise reduction by shielding. To make it more exact, the shield should be grounded at the end where the lower impedance is, mostly the signal source. This is opposite to what Steve said, which was to ground near the signals are consumed, which makes more sense to me because shield potentials, if any, have smaller chance of leaking through to the signal wires. From the impedance point of view, I would also worry more about interference near high-impedance nodes rather than low-impedance nodes, just because smal currents result in larger voltages there. Can you summarize the rationale for your recommendation in the language of electromagnetics? -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] VFD causing limits to trip. Huh?
I would recommend that shielded signal cables have the shield grounded only at the end where the signals are consumed. If a ground is needed by the device at the end of the cable, you should use a conductor inside rather than the shield itself. If there are signals going both ways, provide the shield ground connection at the end where the most sensitive signals are consumed. The purpose of grounding only one end of the shield is to prevent current from flowing in the shield itself and distorting the signals due to electromagnetic coupling. A shield is primarily intended to prevent electrostatic coupling from the outside world. If the cable does not contain sensitive signals, such as the power cable from a VFD to the spindle, then it is acceptable to ground both ends of the shield. Steve Stallings www.PMDX.com -Original Message- From: Matt Tucci [mailto:matt2c1...@gmail.com] Sent: Monday, March 16, 2015 7:54 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] VFD causing limits to trip. Huh? Are the shielded wires only grounded at one end and at the controller end? On Sun, Mar 15, 2015 at 1:22 PM, Karlsson Wang nicklas.karls...@karlssonwang.se wrote: I think grounding is the most important. There are normally a common mode voltage at the inverter output to motor so the inverter power ground will bounce around each time inverter is switched. If this bouncing is coupled to the logic ground there may be a lot of problems. Nicklas Karlsson On Sun, 15 Mar 2015 14:39:24 + (GMT) russ...@lls.lls.com (Russell Brown) wrote: I promised to report back so... I fitted the filter (Schaffner FN2030 Series 16A 250 V ac 400Hz) on the VFD mains input and that did make a difference. My failing case job ran 70% of the way through where without it the job failed 10% in. Not the complete solution though. I then tried a ferrite core (mains clipon stylee) on the input of the field power supply. No difference. A ferrite core (ring with both wires looped through it a couple of times) on the output of the 12V field power made no difference either. A ferrite core (ring as above) on the limit switch wires fitted at the Mesa end made no difference either. So... finally I replaced the limit switch wires with shielded cable (grounded only at the Mesa end). That seemed to do the final trick and the job ran all the way through. Of course I don't know if this is a 100% fix or just enough to get through my failing case (other jobs without all the above have run fine). I guess time will tell. Hope that's useful for someone. -- Regards, Russell | Russell Brown | MAIL: russ...@lls.com PHONE: 01780 471800 | | Lady Lodge Systems | WWW Work: http://www.lls.com | | Peterborough, England | WWW Play: http://www.ruffle.me.uk | -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https
Re: [Emc-users] You-tube rejection [Was: Super-simple linear motor]
Look under TOOLS ADD ONS Extensions You will find buttons to Enable, Disable, and Remove your Extensions. Experiment with Disable to see which one is causing the issue. My guess is that you have one call FlashBlock installed. Steve Stallings -Original Message- From: Erik Christiansen [mailto:dva...@internode.on.net] Sent: Thursday, February 12, 2015 7:37 AM To: emc-users@lists.sourceforge.net Subject: [Emc-users] You-tube rejection [Was: Super-simple linear motor] On 12.02.15 10:15, andy pugh wrote: http://youtu.be/J9b0J29OzAU I have to try this. Does anyone know if You-tube has recently set up some ad-blocker detection and viewer lock-out? For several years I've been clicking on a curved 'f' symbol to get the triangle to start viewing clips. (Since setting some pop-up blocker in firefox, AFAIR) Since January, You-tube clips have refused to start, no matter how many times I click on the 'f' - Unless I'm reaching You-tube via another site, such as a link on a newspaper site. Then it works fine - because they can't see my pop-up blocker? It didn't concern me that Vimeo never worked for me, but blocked right from the first attempt, but You-tube is quite a loss. All other sites are working fine. I've been through firefox's about:config, and the only likely item is: browswer.popups.showPopupBlocker which is now set to False, but You-tube still locks me out. I suppose I could do an apt-get remove --purge firefox, to clear the config as well ... if I have to. Any ideas? Erik -- Australia ranks 44th for average connection speed, according to The State of the Internet Report from cloud service provider Akamai. - http://www.abc.net.au/news/2015-02-09/remote-rural-australians -to-wait-another-year-for-fast-internet/6079476 -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] You-tube rejection [Was: Super-simple linear motor]
If indeed FlashBlock is installed, there is a simpler
way. Go to the TOOLS ADD ONS EXTENSIONS and click
on OPTIONS under FlashBlock. You will find a function
where you can whitelist YouTube so that FlashBlock
does not block YouTube at all.
Steve Stallings
-Original Message-
From: MC Cason [mailto:farmerboy1...@yahoo.com]
Sent: Thursday, February 12, 2015 10:44 AM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] You-tube rejection [Was:
Super-simple linear motor]
On 02/12/2015 07:48 AM, Steve Stallings wrote:
Look under TOOLS ADD ONS Extensions
You will find buttons to Enable, Disable, and Remove
your Extensions. Experiment with Disable to see which
one is causing the issue. My guess is that you have
one call FlashBlock installed.
Steve Stallings
If he was clicking on a curved F, he has Flashblock
installed. This
has been a problem for a while now, and there is a simple fix:
Create a
.mozilla/firefox/somename.default/chrome/userContent.css file
with the following:
@-moz-document domain(youtube.com) {
#theater-background {
display: none ! important;
}
}
Youtube has added a overlay over the videos that prevents
flashblock
from working correctly. The above file will remove the
overlay, and let
the videos play like they used to.
--
MC Cason
Eagle3D - Created by Matthias Weißer
github.com/mcason/Eagle3D
--
Dive into the World of Parallel Programming. The Go Parallel Website,
sponsored by Intel and developed in partnership with Slashdot
Media, is your
hub for all things parallel software development, from weekly thought
leadership blogs to news, videos, case studies, tutorials and
more. Take a
look and join the conversation now. http://goparallel.sourceforge.net/
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users
--
Dive into the World of Parallel Programming. The Go Parallel Website,
sponsored by Intel and developed in partnership with Slashdot Media, is your
hub for all things parallel software development, from weekly thought
leadership blogs to news, videos, case studies, tutorials and more. Take a
look and join the conversation now. http://goparallel.sourceforge.net/
___
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Re: [Emc-users] My google-foo is broken, again.
Perhaps there is a confusion about the size. I understood that Gene was seeking a 1/8 DIAMETER tool, not a 1/8 radius tool. -Original Message- From: andy pugh [mailto:bodge...@gmail.com] Sent: Monday, January 12, 2015 9:16 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] My google-foo is broken, again. On 12 January 2015 at 14:10, andy pugh bodge...@gmail.com wrote: Have you considered making one from tool-steel with your lathe? what is wrong with this? http://www.ebay.com/itm/381118665760 You could remove the bearing. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- New Year. New Location. New Benefits. New Data Center in Ashburn, VA. GigeNET is offering a free month of service with a new server in Ashburn. Choose from 2 high performing configs, both with 100TB of bandwidth. Higher redundancy.Lower latency.Increased capacity.Completely compliant. vanity: www.gigenet.com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- New Year. New Location. New Benefits. New Data Center in Ashburn, VA. GigeNET is offering a free month of service with a new server in Ashburn. Choose from 2 high performing configs, both with 100TB of bandwidth. Higher redundancy.Lower latency.Increased capacity.Completely compliant. www.gigenet.com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Making ebony buttons in wholesale numbers
A hexagonal rather than a rectangular grid will make slightly more efficient use of your stock material. -Original Message- From: Stephen Dubovsky [mailto:smdubov...@gmail.com] Sent: Monday, January 05, 2015 11:59 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Making ebony buttons in wholesale numbers Yes, IME they will cut a V-ish shaped groove where none existed before. Common in sign carving. Mine are woodworking bits so they wont plunge/centercut well and would have to be ramped in like if using a face mill to pocket. Dont know if the little ones for metalworking are center cutting or not. On Mon, Jan 5, 2015 at 11:48 AM, Gene Heskett ghesk...@wdtv.com wrote: Hi all; Checking for roundover mills, MSC has one thats almost useful, 1/16 radius but the tip is .047 in diameter. This is ebony but its still wood so it carves and sands normally. What I had in mind was to carve the sheet of ebony with the roundover, then trade that bit for a mill and cut them out. But my mill choices in the drawer are .03125. That I can code around when I do the cutout, so the only problem is wasting the ebony. My question is: Can these roundover bits actually plow where there is no 'edge' since the edge would not exist at that time? Plow the double sided groove, and then cut the piece out of the sheet. With 2 wide stock, if I cut them out first, then round the edges, I can get 6 pieces out of 2 but have a heck of a time holding them while doing the roundover, but if I do the roundover first, I can only get 5. Even so, I think I cn get the 50 I need from one 1/4 thick, 2 wide, 12 long sheet. Has anyone a better idea? Cheers, Gene Heskett -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) Genes Web page http://geneslinuxbox.net:6309/gene US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS -- Dive into the World of Parallel Programming! The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Dive into the World of Parallel Programming! The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Dive into the World of Parallel Programming! The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Conditional code- GOTO
Some corrections. The parallel port driver for Mach4 (Darwin) will sell for $25.00 Lua (the scripting language used by Mach4) is an open source language and the only relationship to Microsoft is that it will run in a Windows environment, along with many others including Linux. http://www.lua.org/about.html Steve Stallings -Original Message- From: sam sokolik [mailto:sa...@empirescreen.com] Sent: Saturday, October 04, 2014 5:01 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Conditional code- GOTO You also forget to mention that to get the industrial version of mach4 you are going to pay $1000 -$2000. (which isn't that much but a whole lot more than zero...) If you go for the 'hobby' version of mach4 you don't get the fanuc style macroB language extensions. So as I under stand it - you are stuck with the mach3 style language that has no conditionals and such (ie - linuxcnc before owords - which is what Art started with). $200+ more if you want the printer port module - otherwise you need to buy external motion hardware. (which is usually more than mesa, pico or other linuxcnc supported hardware with less flexibility) I still get a kick out of 'needing to be a programmer' to use linuxcnc.. Mach4 is supposedly a lot more flexible to modify. Guess what you have to use - lua - a microsoft programming language.. Before that you had to use 'brains' which was some sort of vb like language.. I just don't understand.. I have setup many many machines without having to do any 'programming' with linuxcnc. Correct me if I am wrong.. (my rant must be on today) sam On 10/03/2014 01:21 PM, Ron Ginger wrote: Mach4 has GOTO in the industrial version. Here is a short snip of how it works. (IF INITIAL FEEDRATE IS OMITTED) IF [#8 NE #0] GOTO20 #8 = #9 N20 seems pretty handy to me, and quite clear to read. ron ginger -- Meet PCI DSS 3.0 Compliance Requirements with EventLog Analyzer Achieve PCI DSS 3.0 Compliant Status with Out-of-the-box PCI DSS Reports Are you Audit-Ready for PCI DSS 3.0 Compliance? Download White paper Comply to PCI DSS 3.0 Requirement 10 and 11.5 with EventLog Analyzer http://pubads.g.doubleclick.net/gampad/clk?id=154622311iu=/41 40/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Meet PCI DSS 3.0 Compliance Requirements with EventLog Analyzer Achieve PCI DSS 3.0 Compliant Status with Out-of-the-box PCI DSS Reports Are you Audit-Ready for PCI DSS 3.0 Compliance? Download White paper Comply to PCI DSS 3.0 Requirement 10 and 11.5 with EventLog Analyzer http://pubads.g.doubleclick.net/gampad/clk?id=154622311iu=/41 40/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Meet PCI DSS 3.0 Compliance Requirements with EventLog Analyzer Achieve PCI DSS 3.0 Compliant Status with Out-of-the-box PCI DSS Reports Are you Audit-Ready for PCI DSS 3.0 Compliance? Download White paper Comply to PCI DSS 3.0 Requirement 10 and 11.5 with EventLog Analyzer http://pubads.g.doubleclick.net/gampad/clk?id=154622311iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] New trajectory planner merged into LinuxCNC'sdevelopment branch
Congratulations and thanks to all who worked to make this possible. It is great to see LinuxCNC making another significant step forward. -Original Message- From: Sebastian Kuzminsky [mailto:s...@highlab.com] Sent: Wednesday, June 11, 2014 9:29 PM To: Enhanced Machine Controller (EMC) Subject: [Emc-users] New trajectory planner merged into LinuxCNC'sdevelopment branch I'm pleased to announce that Robert Ellenberg's new trajectory planner has been merged into LinuxCNC. It is in the master branch, aka 2.7~pre, what will become 2.7 later when it's released. It will be part of build v2.7.0-pre0-550-gd699a06 and later. The new TP is not in 2.5 or 2.6, those will keep working the same way they always have. Robert's new trajectory planner improves LinuxCNC's ability to keep machining speed up, while not violating the programmed feed rate or machine velocity or acceleration constraints from the ini configuration. Your G-code programs should still make the same parts as before, but they should now adhere to the programmed feed rate more closely, and thus cut better and run to completion more rapidly. The old trajectory planner would sometimes slow down more than it needed to, the new one does a better job. Many thanks to Robert Ellenberg for all the coding and debugging, and to Sam Sokolik and others for relentless testing. Brave users of the master branch! Please keep an eye on your machines and let us know if they misbehave in any way. (And let us know if your machines run better than before!) -- Sebastian Kuzminsky -- HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions Find What Matters Most in Your Big Data with HPCC Systems Open Source. Fast. Scalable. Simple. Ideal for Dirty Data. Leverages Graph Analysis for Fast Processing Easy Data Exploration http://p.sf.net/sfu/hpccsystems ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions Find What Matters Most in Your Big Data with HPCC Systems Open Source. Fast. Scalable. Simple. Ideal for Dirty Data. Leverages Graph Analysis for Fast Processing Easy Data Exploration http://p.sf.net/sfu/hpccsystems ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] CNC workshop
Hi Ron, Yes, I am interested, both as a vendor and for talking at seminars. Is this being considered for 2014 or for the next year? Unfortunately I will not arrive at NAMES until Saturday morning, so I cannot make it to the meeting. The Tech Shop space looked nice when I was there just before they opened, but I do not remember how large it was. I seem to remember the shop area, but wasn't there also some office/meeting space on the right as you enter the front door? Will there be enough parking area? One thing that was done at the last CNC Workshop was a one day pass and a flea market area. I understand that these options generate little money to cover the cost and take a lot of space, but they are the sort of thing that can really ramp up attendance if people actually know about them. Regrettably they happened in an almost stealth mode last time. Steve Stallings www.PMDX.com -Original Message- From: Ron Ginger [mailto:rongin...@roadrunner.com] Sent: Sunday, April 20, 2014 9:39 AM To: emc-users@lists.sourceforge.net Subject: [Emc-users] CNC workshop There is interest in reviving the CNC workshop event that ran several years in Galesburg IL then in Ann Arbor MI. The Tech Shop in Allen park MI- a Detroit suburb, has offered to host the event. A meeting has been set to discuss the idea on Friday, April 25, following the setup of the NAMES show. At this time it is strictly a discussion of the possibilities. If anyone on this list is in a position to attend the meeting please let me know and I will give you the details. I would like to get a feeling for the interest of the readers of this list in such an event. Do you see a place for LinuxCNC in such an event? If it was run about the same as before- a 2 or 3 day event with speakers and lots of open discussion and demos, and a registration fee of about $100 would you be interested? Thanks for any feedback, I will report what I receive to the meeting. ron ginger -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] I wonder if there are LinuxCNC applications for this?
There is this one: http://www.parallella.org/board/ Not analog oriented, but it is much cheaper in theory. Theory because they are not shipping yet. Steve Stallings -Original Message- From: andy pugh [mailto:bodge...@gmail.com] Sent: Friday, March 28, 2014 5:35 AM To: Enhanced Machine Controller (EMC) Subject: [Emc-users] I wonder if there are LinuxCNC applications for this? http://www.rs-online.com/designspark/electronics/eng/blog/red- pitaya-bears-fruit-and-it-tastes-good There may be other Zynq boards that are better-suited, but it seems to do well for high-speed analogue outputs. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] BBB and LCD 7
EmBest, a division of element14 (aka Farnell/Newark Electronics) has started second sourcing the BBB. Slightly higher price, but includes a console port serial debug cable. See: http://www.embest-tech.com/shop/star/beaglebone-black.html Also, it looks like the situation with Circuit Co. should be getting slightly better. A few units have shown up on GarageLab and Special Computing, but sell quickly. Steve Stallings -Original Message- From: Charles Buckley [mailto:rijrun...@gmail.com] Sent: Friday, March 14, 2014 10:34 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] BBB and LCD 7 Does anyone know of a place to purchase more beaglebones? Seems like everyone is out of stock. Charles Buckley On Wed, Mar 12, 2014 at 12:45 AM, Paul Lacatus (Personal) p...@paul-lacatus.ro wrote: On Element 14 there is BBview : http://www.element14.com/community/docs/DOC-55844/l/element14- bb-view-lcd-cape-for-beaglebone-family-boards I have tested the 4 version but not on machinekit , on debian . On 3/12/2014 2:21 AM, Charles Buckley wrote: I am using a lilliput 7 inch, but that is on x86. Not sure about the touch drivers on BBB. I tried modifying gaxis for gscreen, but it was hit or miss in terms of functionality. It would drop into a weird state where it would not home because it thought it was homing an axis. On Tue, Mar 11, 2014 at 2:35 PM, Condit Alan condita...@yahoo.com wrote: I had a 7 LCD cape on order from Mouser for several months and finally gave up and cancelled the order. Does anyone have any suggestions for a good 7 LCD touch screen to use with the BBB and LinuxCNC? Alan -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/13534_NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/13534_NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/13534_NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/13534_NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/13534_NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] BBB and LCD 7
Oops, their shipping is a killer. Another alternative at a still higher price but cheaper shipping: http://www.seeedstudio.com/depot/BeagleBone-Black-Embest-p-1736.html Steve Stallings -Original Message- From: Steve Stallings [mailto:steve...@newsguy.com] Sent: Friday, March 14, 2014 11:48 AM To: 'Enhanced Machine Controller (EMC)' Subject: Re: [Emc-users] BBB and LCD 7 EmBest, a division of element14 (aka Farnell/Newark Electronics) has started second sourcing the BBB. Slightly higher price, but includes a console port serial debug cable. See: http://www.embest-tech.com/shop/star/beaglebone-black.html Also, it looks like the situation with Circuit Co. should be getting slightly better. A few units have shown up on GarageLab and Special Computing, but sell quickly. Steve Stallings -Original Message- From: Charles Buckley [mailto:rijrun...@gmail.com] Sent: Friday, March 14, 2014 10:34 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] BBB and LCD 7 Does anyone know of a place to purchase more beaglebones? Seems like everyone is out of stock. Charles Buckley On Wed, Mar 12, 2014 at 12:45 AM, Paul Lacatus (Personal) p...@paul-lacatus.ro wrote: On Element 14 there is BBview : http://www.element14.com/community/docs/DOC-55844/l/element14- bb-view-lcd-cape-for-beaglebone-family-boards I have tested the 4 version but not on machinekit , on debian . On 3/12/2014 2:21 AM, Charles Buckley wrote: I am using a lilliput 7 inch, but that is on x86. Not sure about the touch drivers on BBB. I tried modifying gaxis for gscreen, but it was hit or miss in terms of functionality. It would drop into a weird state where it would not home because it thought it was homing an axis. On Tue, Mar 11, 2014 at 2:35 PM, Condit Alan condita...@yahoo.com wrote: I had a 7 LCD cape on order from Mouser for several months and finally gave up and cancelled the order. Does anyone have any suggestions for a good 7 LCD touch screen to use with the BBB and LinuxCNC? Alan -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/13534_NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/13534_NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/13534_NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/13534_NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/13534_NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https
Re: [Emc-users] BBB and LCD 7
Yes, I looked at the Galileo and was not impressed with it as a possible CNC controller. The I/O access is a problem. The Arduino compatible stuff is compatible only at the Sketch software level. The actual signals are generated from I2C devices and cannot be run very fast. It looks like the best hope for fast I/O is the mini- PCIexpress card slot. Also, the Galileo offers no on-board video. The Cubie stuff looks much better suited for CNC control if you can live without the PRU co-processors on the BBB. Steve Stallings -Original Message- From: Charles Buckley [mailto:rijrun...@gmail.com] Sent: Friday, March 14, 2014 11:12 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] BBB and LCD 7 Thanks. Looking into it. Has anyone looked at http://garagelabstore.com/store/embedded/galileo-intel-dev-boa rd.html the galileo for Linuxcnc? Charles Buckley -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/13534_NeoTech ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Printrboard and LinuxCNC
Andy's description of the Mach external pulser API is correct. The device driver gets to select the length of the buffer and also select a pulses per time slice or a way-point version of the data. USB under Windows seems to require at least 1 second of buffered data to be workable. Not pleasant, but lots of people use it anyway. USB itself is not the problem, it is the Windows protocol stack that can cause significant delays. It is optimized for throughput not minimum latency. E-Stop, limits, homing, probing, and threading are the responsibility of the device and its driver. This results in lots of complicated code in the driver and significant variations in performance from one type of device to another. Steve Stallings -Original Message- From: andy pugh [mailto:bodge...@gmail.com] Sent: Friday, February 28, 2014 8:52 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Printrboard and LinuxCNC On 28 February 2014 13:36, Michael Haberler mai...@mah.priv.at wrote: The question, then, is how come Mach3 can have USB cabling, but LinuxCNC can't? (see the KX* mills from Arc Eurotrade in the UK; now with USB input) I have no idea about that API uses over USB, but I'd be curious There is a clue on page 26 here: http://www.warp9td.com/documentation/SmoothStepperUserManualV1.0.pdf It looks like the SmoothStepper accepts 1kHz position data, rather similarly to the Mesa and Pico boards. The difference seems to be a buffer of around 1 second. I assume that e-stop (at least) is handled on-board. I rather assume that limit switches and homing need to be too. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Flow-based real-time traffic analytics software. Cisco certified tool. Monitor traffic, SLAs, QoS, Medianet, WAAS etc. with NetFlow Analyzer Customize your own dashboards, set traffic alerts and generate reports. Network behavioral analysis security monitoring. All-in-one tool. http://pubads.g.doubleclick.net/gampad/clk?id=126839071iu=/41 40/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Flow-based real-time traffic analytics software. Cisco certified tool. Monitor traffic, SLAs, QoS, Medianet, WAAS etc. with NetFlow Analyzer Customize your own dashboards, set traffic alerts and generate reports. Network behavioral analysis security monitoring. All-in-one tool. http://pubads.g.doubleclick.net/gampad/clk?id=126839071iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Printrboard and LinuxCNC
True, all USB devices, the USB SmoothStepper included struggle to deal with electrical noise in an industrial environment. The Mach3/SmoothStepper combination makes this particularly painful because a communications hiccup usually results in having to restart Mach3 and sometimes even requires a power on reset of the SmoothStepper to force Windows to reinitialize the protocol stack. Regular USB does not provide galvanic isolation and ground loops are a real NO-NO because current flowing in the shield of the USB cable will corrupt the data. There are USB isolators, but the results seem to be mixed on their success. I suspect that this is because isolation alone may not solve all the noise problems. Ethernet mostly solves the electrical noise problems. The Ethernet protocol stack in Windows does not try as many queuing tricks as USB and the response is much better. Use of the correct modes can bypass the error recovery stuff in the protocol stack that causes delays when the delay results in more problems that the lost data would cause. Most of the issues with Ethernet are with addressing and firewalls. Steve Stallings -Original Message- From: Dave Cole [mailto:linuxcncro...@gmail.com] Sent: Friday, February 28, 2014 10:48 AM To: emc-users@lists.sourceforge.net Subject: Re: [Emc-users] Printrboard and LinuxCNC The original Smooth Stepper also suffered from USB issues which seemed to be related to grounding or isolation issues?? Steve probably knows a lot more about that than I do. The later designed, Ethernet Smooth Stepper device does not seem to exhibit similar issues. Dave On 2/28/2014 10:32 AM, Steve Stallings wrote: Andy's description of the Mach external pulser API is correct. The device driver gets to select the length of the buffer and also select a pulses per time slice or a way-point version of the data. USB under Windows seems to require at least 1 second of buffered data to be workable. Not pleasant, but lots of people use it anyway. USB itself is not the problem, it is the Windows protocol stack that can cause significant delays. It is optimized for throughput not minimum latency. E-Stop, limits, homing, probing, and threading are the responsibility of the device and its driver. This results in lots of complicated code in the driver and significant variations in performance from one type of device to another. Steve Stallings -Original Message- From: andy pugh [mailto:bodge...@gmail.com] Sent: Friday, February 28, 2014 8:52 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Printrboard and LinuxCNC On 28 February 2014 13:36, Michael Haberler mai...@mah.priv.at wrote: The question, then, is how come Mach3 can have USB cabling, but LinuxCNC can't? (see the KX* mills from Arc Eurotrade in the UK; now with USB input) I have no idea about that API uses over USB, but I'd be curious There is a clue on page 26 here: http://www.warp9td.com/documentation/SmoothStepperUserManualV1.0.pdf It looks like the SmoothStepper accepts 1kHz position data, rather similarly to the Mesa and Pico boards. The difference seems to be a buffer of around 1 second. I assume that e-stop (at least) is handled on-board. I rather assume that limit switches and homing need to be too. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Flow-based real-time traffic analytics software. Cisco certified tool. Monitor traffic, SLAs, QoS, Medianet, WAAS etc. with NetFlow Analyzer Customize your own dashboards, set traffic alerts and generate reports. Network behavioral analysis security monitoring. All-in-one tool. http://pubads.g.doubleclick.net/gampad/clk?id=126839071iu=/41 40/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Flow-based real-time traffic analytics software. Cisco certified tool. Monitor traffic, SLAs, QoS, Medianet, WAAS etc. with NetFlow Analyzer Customize your own dashboards, set traffic alerts and generate reports. Network behavioral analysis security monitoring. All-in-one tool. http://pubads.g.doubleclick.net/gampad/clk?id=126839071iu=/41 40/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Flow-based real-time traffic analytics software. Cisco certified tool. Monitor traffic, SLAs, QoS, Medianet, WAAS etc. with NetFlow Analyzer Customize your own dashboards, set
Re: [Emc-users] Fun with trajectory planners and Halscope
Also wonder if there is any concern if the LinuxCNC looking at LinuxCNC is taking synchronized readings thus avoiding one source of jitter, while LinuxCNC looking at Mach3 is two different computers with independent timing. Steve Stallings -Original Message- From: andy pugh [mailto:bodge...@gmail.com] Sent: Tuesday, February 25, 2014 6:47 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Fun with trajectory planners and Halscope On 25 February 2014 11:08, Alex Joni alex.j...@robcon.ro wrote: Since it's hardware counters on the 7i80, you can trust them pretty much. Are we absolutely sure that the velocity/accel is being calculated from a stable clock unaffected by any ethernet comms latency or servo-thread jitter? -- atp -- Flow-based real-time traffic analytics software. Cisco certified tool. Monitor traffic, SLAs, QoS, Medianet, WAAS etc. with NetFlow Analyzer Customize your own dashboards, set traffic alerts and generate reports. Network behavioral analysis security monitoring. All-in-one tool. http://pubads.g.doubleclick.net/gampad/clk?id=126839071iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Crackling motors using Beaglebone
Note to those checking out the video. You will need to have the volume turned up high. The cracking occurs during most of the video and it sounds like an old fashioned Geiger counter ticking to me. Steve Stallings -Original Message- From: Mark Tucker [mailto:m...@rmtucker.f2s.com] Sent: Saturday, February 22, 2014 4:52 AM To: emc-users@lists.sourceforge.net Subject: Re: [Emc-users] Crackling motors using Beaglebone Peter The crackling is random and mainly after jog moves. The motors are Nema34 and running at 72v and approc 4amps. On 21/02/14 22:25, peter smith wrote: Mark What type of motors and voltage are you using, is the crackling random, or specifically after a certain type of move?? Regards Peter Smith On 21/02/14 16:55, Jon Elson wrote: On 02/21/2014 05:41 AM, Mark Tucker wrote: So it seems that the hal configuration has to be altered and the ini,just reading the sample pico configs. All i need now is someone to integrate this into the beaglebone/xylotex db25 configs. How is the deadband figure worked out,Trial and error? I should have said it in my first message, slightly more than 1/2 the step resolution suppresses the need to move if off by less than a single step. Jon -- Managing the Performance of Cloud-Based Applications Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. Read the Whitepaper. http://pubads.g.doubleclick.net/gampad/clk?id=121054471iu=/41 40/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Managing the Performance of Cloud-Based Applications Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. Read the Whitepaper. http://pubads.g.doubleclick.net/gampad/clk?id=121054471iu=/41 40/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Managing the Performance of Cloud-Based Applications Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. Read the Whitepaper. http://pubads.g.doubleclick.net/gampad/clk?id=121054471iu=/41 40/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Managing the Performance of Cloud-Based Applications Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. Read the Whitepaper. http://pubads.g.doubleclick.net/gampad/clk?id=121054471iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] What do you folks think of this kit for etching pcb's
We use a similar one, same power unit but an older Electrocraft motor instead of the Chinese copy. The speed is more or less adequate for engraving, around 8000 to 1 RPM. For the one on eBay, I worry about runout. It looks like they just used a setscrew to secure the collet holder to the motor shaft. I would guess the minimum speed is related to the loss of torque. This control does not provide IR compensation for motor loading. Steve Stallings -Original Message- From: Gene Heskett [mailto:ghesk...@wdtv.com] Sent: Friday, December 27, 2013 5:55 PM To: Enhanced Machine Controller (EMC) Subject: [Emc-users] What do you folks think of this kit for etching pcb's http://www.ebay.com/itm/400W-CNC-Spindle-Motor-Kits-PWM-Speed -Controller-With-Mount- Bracket/221268429297?rt=nc_trksid=p2047675.m1851_trkparms=ai d%3D222002%26algo%3DSIC.FIT%26ao%3D1%26asc%3D19463%26meid%3D37 02793811656558252%26pid%3D15%26prg%3D8798%26rk%3D1%26rkt%3 D5%26sd%3D380705868216%26 I am thinking of making up a whole new column and Z drive assembly that I could swap out by 4 bolts a couple of cables when I wanted to do some pcb work. LMS has the column, I already have the z sled casting, and I can easily make a fresh ball screw Z drive. I like the idea that this controller takes a straight pwm signal as input, nut I'm not sure why the 3k revs minimum speed. Cooling related under load perhaps? Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) Genes Web page http://geneslinuxbox.net:6309/gene No one may kill a man. Not for any purpose. It cannot be condoned. -- Kirk, Spock's Brain, stardate 5431.6 A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. -- Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831iu=/414 0/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Rotary stage
With patents all that matters is the claims. Usually there is only one real claim and the rest of the claims are derivative of the first claim. In this case it looks like claim number one is very specific to a device that utilizes 3 design elements together. My guess is that the ball return path inside the worm is the truly new element. All the diagrams, description, and math are nice but they do not affect the actual claim. Steve Stallings -Original Message- From: TJoseph Powderly [mailto:tjt...@gmail.com] Sent: Monday, October 28, 2013 9:30 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Rotary stage On 10/28/2013 08:41 AM, Stuart Stevenson wrote: Do you have a design you can share? I would try to model it. maybe of use from John Hopkins http://urobotics.urology.jhu.edu/pub/2006-stoianovici-uspto-07 051610.pdf yeah its patented but you can make for for your own use cantcha? regards Tomp tjtr33 -- October Webinars: Code for Performance Free Intel webinars can help you accelerate application performance. Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most from the latest Intel processors and coprocessors. See abstracts and register http://pubads.g.doubleclick.net/gampad/clk?id=60135991iu=/414 0/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- October Webinars: Code for Performance Free Intel webinars can help you accelerate application performance. Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most from the latest Intel processors and coprocessors. See abstracts and register http://pubads.g.doubleclick.net/gampad/clk?id=60135991iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] JogWhilePaused Proposal
Am 06.10.2013 um 23:09 schrieb Ricardo Moscoloni rmoscol...@gmail.com: this is great!, could you think adding a pin that defines last resuming move along an axis (z on a mill as an examlple), to avoid collisions will be useful? As cartesian as my brain could think, moves will be: hit pause jog(here you have to avoid collisions!) hit resume auto move to last x,y last approach move along z, if theres any (z is the axis that you define previously) continue machining fun. that's an interesting idea the return move certainly warrants some thinking - just a jog from current to the pause position is a bit narrow in application a generalisation could be this: - add a pause and a return offset pose via HAL pins - transit through these offset positions on pause/resume respectively your scenario would be covered by setting a resume offset pose with z != 0 only, and it retains some of the flexibility of the purely HAL-based solutions as the offset poses can be modified at runtime I'm open to more flexible ideas -Michael Just keep in mind that for a lathe, Z is not likely to be the last move of a restore. -- October Webinars: Code for Performance Free Intel webinars can help you accelerate application performance. Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most from the latest Intel processors and coprocessors. See abstracts and register http://pubads.g.doubleclick.net/gampad/clk?id=60134791iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Is this some kind of RPM counter?
It looks more like an auxiliary motor to run a cooling fan for the big motor. This is sometimes needed if the large motor is under speed control and running at low speed. Steve Stallings -Original Message- From: Sven Wesley [mailto:svenne.d...@gmail.com] Sent: Monday, September 30, 2013 9:32 PM To: Enhanced Machine Controller (EMC) Subject: [Emc-users] Is this some kind of RPM counter? That thing that looks like a small motor in serial. http://farm8.staticflickr.com/7421/10027375954_9ecca084b7_c.jpg /Sven -- October Webinars: Code for Performance Free Intel webinars can help you accelerate application performance. Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most from the latest Intel processors and coprocessors. See abstracts and register http://pubads.g.doubleclick.net/gampad/clk?id=60134791iu=/414 0/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- October Webinars: Code for Performance Free Intel webinars can help you accelerate application performance. Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most from the latest Intel processors and coprocessors. See abstracts and register http://pubads.g.doubleclick.net/gampad/clk?id=60134791iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Very weird thing with my stepper motors. They don'tlike to be moved while running.
Greg, The regular thumping noise, about twice a second, seems to be a symptom of a major timing problem with your step pulses. If you are using software generated step pulses, perhaps there is a video driver problem. Steve Stallings -Original Message- From: Gregg Eshelman [mailto:g_ala...@yahoo.com] Sent: Sunday, September 22, 2013 5:51 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Very weird thing with my stepper motors. They don'tlike to be moved while running. On Sun, 9/22/13, Claude Froidevaux men...@bluewin.ch wrote: Subject: Re: [Emc-users] Very weird thing with my stepper motors. They don't like to be moved while running. To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Date: Sunday, September 22, 2013, 6:20 AM Le 22.09.2013 06:54, Gregg Eshelman a écrit : That's not the weird thing. What is effed up is that when the motor is running if I pick it up or move it, it stops running. Doesn't matter if it's laying down or standing on its back end, if it's picked straight up or allowed to rotate around its shaft axis it locks up and squeals. Tried two of the three, both do the same thing. That let me thing you may have miss-connect the motor. 1 phase must be connected between A+ and A- (you shall measure low impedance on motor motor side). I have got theses strange result once when I wired a phase between A and B output of the driver. Claude I've checked to make sure one coil is connected to a+ and a- and the other to b+ and b- Disconnecting the enable line allows it to run both directions instead of just counterclockwise. Still has a low and slow pulsing harmonic vibration. I tried reversing one coil and that made it worse so I switched it back. I've also swapped pair A and B locations. Always has this vibration. I also disconnected both ends of the enable wire and moved the ground to dir - with a jumper to pul - Here's a video http://www.youtube.com/watch?v=uL9tzYGSVhYfeature=youtu.be Have to get rid of that vibration and the sensitivity to motion. They're over 1,000 oz-in torque, should be plenty of rotor inertia that one could stick the motor on the end of a baseball bat and wave it around without bothering it. That's something I've noticed in every Youtube video of people showing stepper motors running. Nobody ever picks up or otherwise moves them except for when they're firmly mounted to something like the head on an X-Y gantry. -- LIMITED TIME SALE - Full Year of Microsoft Training For Just $49.99! 1,500+ hours of tutorials including VisualStudio 2012, Windows 8, SharePoint 2013, SQL 2012, MVC 4, more. BEST VALUE: New Multi-Library Power Pack includes Mobile, Cloud, Java, and UX Design. Lowest price ever! Ends 9/22/13. http://pubads.g.doubleclick.net/gampad/clk?id=64545871iu=/414 0/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- LIMITED TIME SALE - Full Year of Microsoft Training For Just $49.99! 1,500+ hours of tutorials including VisualStudio 2012, Windows 8, SharePoint 2013, SQL 2012, MVC 4, more. BEST VALUE: New Multi-Library Power Pack includes Mobile, Cloud, Java, and UX Design. Lowest price ever! Ends 9/22/13. http://pubads.g.doubleclick.net/gampad/clk?id=64545871iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Simplexmotion servo with integrated controller
Interesting packaged motor, but I wonder about some of the design choices. This device uses an outer rotor PMSM with no provision for air flow nor any significant conduction path for heat from the coils to the unit's outer housing. Also the single ended bearing arrangement required by an outer rotor setup are not well suited to side loads. The motor driver electronics are a nice concept and seem to be well executed. Alas the example machine on the web site is running Mach3, not LinuxCNC and the interface is basic step and direction in this application. Steve Stallings -Original Message- From: andy pugh [mailto:bodge...@gmail.com] Sent: Monday, August 05, 2013 7:55 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Simplexmotion servo with integrated controller On 5 August 2013 12:38, Sven Wesley svenne.d...@gmail.com wrote: New product that has documentation howto set up a step/dir config with LinuxCNC. Interesting. http://simplexmotion.com/ That does look like quite an interesting system. I wonder what they are using for position feedback? Following the link to the shop they are less cheap than I had hoped, though not unreasonable/ I then followed a link to a video: http://youtu.be/X_agTiic7XM I think that they have their proxes wired wrongly. (dim glow all the time, strong glow when activated). I had mine like that at first, it is a sign of NPN proxes wired PNP (or the other way round). Curiously it does still work. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Get your SQL database under version control now! Version control is standard for application code, but databases havent caught up. So what steps can you take to put your SQL databases under version control? Why should you start doing it? Read more to find out. http://pubads.g.doubleclick.net/gampad/clk?id=49501711iu=/414 0/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Get your SQL database under version control now! Version control is standard for application code, but databases havent caught up. So what steps can you take to put your SQL databases under version control? Why should you start doing it? Read more to find out. http://pubads.g.doubleclick.net/gampad/clk?id=49501711iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] LinuxCNC on line planning and policy meeting for July starts in 30 minutes (16:00 GMT) on at #linuxcnc-meeting on freenode.net
just a last minute reminder . http://wiki.linuxcnc.org/cgi-bin/wiki.pl?MeetingsOnIRC -- See everything from the browser to the database with AppDynamics Get end-to-end visibility with application monitoring from AppDynamics Isolate bottlenecks and diagnose root cause in seconds. Start your free trial of AppDynamics Pro today! http://pubads.g.doubleclick.net/gampad/clk?id=48808831iu=/4140/ostg.clktrk ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Retrofit Candidate Advice
-Original Message- From: Chris Radek [mailto:ch...@timeguy.com] Sent: Tuesday, June 25, 2013 12:08 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Retrofit Candidate Advice On Mon, Jun 24, 2013 at 10:18:06PM -0500, Charles Steinkuehler wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Besides my 3D printing endeavors, I am involved with trying to get a hackerspace going here in Topeka. Recently a CNC mill that might make a good LinuxCNC retrofit candidate popped up on the local craigslist: snip I notice there's no tool release button marked on the panel. I would really NOT want a manual drawbar on a CNC, especially if the top of the head's 8 feet in the air. Really late response here... but that looks like Erikson Quick Change 40 taper tooling. Manual change only, but everything happens at the bottom end of the spindle, not the top. Steve Stallings -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] PID Best Practices
Lots of good responses already here, but I want to emphasize a couple of the points. If you are reading the temperature 20 times per second, then you should only run the PID loop 20 times per second. Anything more is just excess gain and an invitation to trouble. The actual loop rate (read and correct) should not happen more than about 10 times in one time constant of the system. My guess is that the time constant of your extruder is in the range of one second and the bed heater might be in the range of 5 seconds. Integral wind up is a significant problem in heater systems. There are three main ways to combat integral problems. (1) use little or no integral term (2) freeze the integral accumulation when the output is at the extremes of its range (3) dump excess accumulated integral when the input command changes direction. The latter is not applicable to temperature control because your input command is not changing direction. I have not tried it, but it would seem that FF0 would be quite helpful in heater systems because it would not be influenced by the unequal positive and negative gain of the system where heat pushes the temperature up but only passive cooling pulls it down. If the heater element is not easily damaged by excess input, I would start by setting everything but FF0 to zero and get an approximately correct response from FF0. With FF0 set such that you do not quite get the desired temperature, add some P gain. D gain is added to help prevent overshoot. I gain is added only when the P gain leaves the system always slightly short of the target during the steady state condition. Steve Stallings -Original Message- From: Charles Steinkuehler [mailto:char...@steinkuehler.net] Sent: Thursday, June 27, 2013 9:57 AM To: EMC2-Users-List Subject: [Emc-users] PID Best Practices -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 I am having some issues tuning the PID loop for temperature control on my LinuxCNC controlled 3D printer, so I thought I'd ask about some best practices for PID setup. QUESTION: How are gains typically arranged in a PID control loop? Is the PID output generally scaled to represent something real (like the 0-300 degree range of my temperature readings), something arbitrary (like +/- 100 or 1000), or just left at whatever random value seemed like a good idea when the HAL file was first created? Does pushing gain around between the PID component and the output driver change how easy/hard it is to tune the PID loop? BACKGROUND: I have a temperature reading updated 20 times a second by user code feeding into a standard HAL PID component that runs at the default 1 mS rate. Driving the heater is a PWM output that is generated by my PRU code, but mimics the behavior of the hm2 pwmgen (including generating output for negative input values, which IMHO is just wrong, but I know why it was done that way). Anyway, the PWM output has it's default scale, so 0.0 to 1.0 is no output to full scale. I have a limit component between the PID and the PWM to clip the negative PID output values, and a bias setting of 0.5 on the PID. ...but this is turning out to be very hard to tune. I get good results playing with P gain and adding in some D, but if I ever try adding any I term it just goes crazy and oscillates (or just runs away). I think my basic issue is integrator wind-up, and given my very small 0.0-1.0 output range the integrator term can easily swamp the output even with very small gains. By way of example, as my HAL file stands now, a P gain setting of 0.5 is approximately my critical gain, and P=0.3, D=0.93, I=0 was a pretty stable control loop. So I'm looking at clipping the I term with maxerrorI, but I am also wondering about the overall gain setup. I have scale available on the PWM, and obviously all the gain settings to play with on the PID component, I'm just wondering if there's a somewhat standard way to dial some of the knobs. Thanks! - -- Charles Steinkuehler char...@steinkuehler.net -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.11 (MingW32) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iEYEARECAAYFAlHMRJEACgkQLywbqEHdNFyrHgCgsyuk4DSU6LvRNFl3MjvrOzVr 7sIAoKIqOrqqPdZzUXp0W2uy4jmHPc9A =KzET -END PGP SIGNATURE- -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https
Re: [Emc-users] PID Best Practices
snip I respectfully disagree. As long as the integral term is normalized to the run rate, there is nearly no effect to running the loop faster than then the time constant. Analog PID works at a (near) infinite rate. OK, point taken. My caution comes from the fact that many digital implementations do not handle very small integral gains properly. Steve Stallings -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Wichita LinuxCNC meeting
http://www.electronicsam.com/images/KandT/Fest2013/ -Original Message- From: Mark Wendt [mailto:wendt.m...@gmail.com] Sent: Wednesday, June 26, 2013 8:56 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Wichita LinuxCNC meeting On Wed, Jun 26, 2013 at 8:49 AM, Stuart Stevenson stus...@gmail.com wrote: 1301 Andy Pugh, Jeff Epler 1302 John Morris, Jeff Epler, Dave Bagby, Jon Elson, Chris Radek, Ken snippage Crap. Anybody got the link again? I mistakenly deleted it. Mark -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] 3d scanner
-Original Message- From: Stuart Stevenson [mailto:stus...@gmail.com] Sent: Wednesday, June 12, 2013 9:05 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] 3d scanner this is what we need to be working toward :) http://www.faro.com/en-us/products/metrology/measuring-arm-far o-scanarm/overview Regardless of how well it works, or how much it costs that is one wicked looking tool! -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] K9 SmorgasBoard for testing LinuxCNC on BeagleBone
What, me test? Frankly, much of it will not get tested before the Wichita trip. I hope to get the power system and basics confirmed, but lots of stuff may get tested the first time at Wichita. Steve Stallings -Original Message- From: Jon Elson [mailto:el...@pico-systems.com] Sent: Tuesday, June 11, 2013 11:51 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] K9 SmorgasBoard for testing LinuxCNC on BeagleBone Steve Stallings wrote: More details later, but here is a layout image of the PCB to look over: http://www.pmdx.com/k9/k9-image.pdf Wow, that has a lot more on it than I was expecting! Good luck, how are you going to test it? Jon -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] C41 spindle controller question?
I did some trace cutting and made the output stage a gain of 1.45 or so, so I am now getting about 10.4 volts, which helped some. Now it looks as if I may be forced to trade the 7812 in my home made supply in for a 7815 or an LM317?, whatever the adjustable one is. Gene, You could always trick your 7812 into being an adjustable regulator by attaching its ground leg to a resistor divider off of the output. See Figure 4 at the bottom of page 8 in this data sheet: http://www.ti.com/lit/ds/symlink/ua7805.pdf Regards, Steve Stallings -- Try New Relic Now We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_may ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] C41 spindle controller question?
snip Arturo has finally realized that the so-called reversing relay lashup he has on the C41 is worthless because it cannot be controlled independently, instead dropping out a few milliseconds after the PWM stops. That will destroy motor controllers and may damage the PM field magnets when the controller suddenly sees a motor it thought was turning 7 grand in reverse, suddenly being put in the fwd mode with no time to brake it, and the analog from the PWM has not decayed to zero yet. I think your 106 also does this as I put a dropout delay in the .hal file for my mill, and that did not stop the controller from thumping the motor pretty hard when I issue an M5 to stop the tool from about 250 rpm in reverse, which I use, along with a G38.2 command to find the edge of something. The slowly turning bit makes a good contact (I have a .2 uf cap across the probe so it stores the momentary contact without touching the work hard enough to mark it) So the next run of C41's he makes will do the reverse as long as commanded from its input. FWIW, that is not a problem with the 106 when running it from the hand switches, then it works correctly, but then my dynamic braking there is resistive. snip I have a somewhat different viewpoint on how the interface is intended to work. The job of the interface is to supply control information to the motor driver representing the desired operation of the CNC program. It is the motor driver's job to assure that the drive electronics does what is reasonable for the motor that it runs. Using the direction command requests from the interface to directly control relays that switch the high current armature leads of a DC motor is not workable for a general purpose interface. The most common type of control interface for VFDs and high power DC motor drivers is one that accepts one switch that closes when forward run is desired and one switch that closes when reverse run is desired. This interface must open both switches to indicate stopping the motor. The alternative Run and Direction (European style) interface could accommodate holding the direction signal while stopping the motor, but that still ignores the issue of how long the control interface must be stopped before it is safe to request running in the opposite direction. VFDs and DC motor drivers with internal reversing circuits take care of the requirements to safely reverse the motor in response to their command inputs without expecting the command generator to follow any special rules. A special interface that accommodates reversing DC motors by controlling a relay that reverses the armature leads could be done, but it is not trivial due to the stored energy and the need to brake the motor. The market share of DC motor drives relative to those powered by VFD driven induction motors is small and we have not addressed it directly. Steve Stallings -- Try New Relic Now We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_may ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] G540, trip pots and stepper motor temperatures.
What is the winding inductance of the motors? NEMA 17 and NEMA 11 motors sometimes have really low inductance. This causes the current to rise and fall in the windings with each PWM cycle. The result can be heating of the iron due to hysteresis losses. This can be counteracted by using a lower supply voltage or an external inductor to increase the apparent inductance of the motor. Steve Stallings -Original Message- From: John Stewart [mailto:ivatt...@gmail.com] Sent: Sunday, May 26, 2013 2:19 PM To: Enhanced Machine Controller (EMC) Subject: [Emc-users] G540, trip pots and stepper motor temperatures. I'm getting my little Unimat CNC lathe going, and am doing axis running tests; right now working on the Z axis (carriage movement) The X axis stepper is sitting idle, the Z axis stepper is running back and forth. It is really hot to the touch, and one can smell hot insulation. From what I calculated, this NEMA-11 stepper motor has a motor voltage of about 68 volts, running it on 48 volts. (the X axis stepper is slightly smaller) When it was just sitting, the motor was hot to the touch. From reading this list, one might think that running the motor might actually keep it cooler. Anybody know why one stepper motor would be overheating? (10mm/sec step rate, not overly fast) Yours truly, letting things cool off before trying anything else; John A. Stewart. -- -- Try New Relic Now We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_may ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] C41 spindle controller question?
Gene, This board appears to use an LM358 bipolar op amp in its output stage. This style of op amp will only swing the output voltage up to about 1.5 volts below the supply voltage, so regardless of the opto coupler performance you will not get 12 volts out while running on a 12 volt supply. Indeed the output voltage range claimed for the C41 is only 0 to 10 volts. It may go to 12 volts out if powered by 15 volts assuming the output amplifier is set up to allow a gain greater than one to be applied to the filtered PWM signal. Keep in mind that the power source for this board must be isolated from other supplies in the system because it may be floating at line voltage depending on the motor driver being used. Steve Stallings -Original Message- From: Gene Heskett [mailto:ghesk...@wdtv.com] Sent: Sunday, May 26, 2013 3:25 PM To: 'Enhanced Machine Controller (EMC)' Subject: [Emc-users] C41 spindle controller question? Greetings; Has anyone reverse drawn a schematic for the cnc4pc C41 spindle controller? For some strange reason I am only getting about 8 volts P-P out of the LVT847 optoisolator, whereas I was under the impression it should be a nearly 12 volt P-P swing at that point. Board input 12 volt is 11.89 volts. This 1HP motors controller needs a full 12 volts for wide open. So I'm only getting about 750 revs in high back gear, 300 in low range. Thanks all. Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene is up! My views http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml THE DAILY PLANET SUPERMAN SAVES DESSERT! Plans to Eat it later A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. -- Try New Relic Now We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_may ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Try New Relic Now We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_may ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] converting Monarch 10EE - EVs
-Original Message- From: Pete Matos [mailto:petefro...@gmail.com] Sent: Wednesday, May 01, 2013 8:43 AM I am not gonna further clutter this thread with an argument about EV's. back to the Monarch EE discussion...peace Please let that be true, this list is active enough without off topic arguments. -- Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET Get 100% visibility into your production application - at no cost. Code-level diagnostics for performance bottlenecks with 2% overhead Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap1 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] converting Monarch 10EE
-Original Message- From: Jon Elson [mailto:el...@pico-systems.com] Sent: Monday, April 29, 2013 1:00 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] converting Monarch 10EE andy pugh wrote: It has to make more sense to couple a 3-phase motor and single-phase-input VFD directly to the spindle? The motor is an odd frame, and also has MASSIVE torque at low speed. So, the 10EE has no back gear. It probably works MUCH better at low speed than a VFD and typical 3-phase motor. You could make an argument for a DC drive for the motor, but that could be a major project, and not a good one if you aren't an electrical engineer. Jon The 10EE does utilize a DC motor with impressive low speed torque, but it none-the-less does have a backgear. The gear assembly is on the end of the motor, not in the headstock. See this photo: http://www.google.com/imgres?imgurl=http://www.practicalmachinist.com/vb/at tachments/f10/19126d1263689447-backgear-monarch-10-ee-3-hp-motor-back-gear.j pgimgrefurl=http://www.practicalmachinist.com/vb/monarch-lathes/backgear-19 6511/h=768w=1024sz=76tbnid=v8fc691q6yRUYM:tbnh=102tbnw=136prev=/searc h%3Fq%3Dmonarch%2B10ee%2Bback%2Bgear%26tbm%3Disch%26tbo%3Duzoom=1q=monarch +10ee+back+gearusg=__Zttj_U5_FmZ9wlMHQYqmIwTmtFA=docid=beP_ccGHfzktLMhl=e nsa=Xei=0q1-UaaxBonc2AXar4HoBAved=0CD0Q9QEwAQdur=5072 Sorry for the run-on URL, but I could not find a shorter one. Steve Stallings -- Try New Relic Now We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] ?Beaglebone LinuxCNC starterkit: ready-to-run SD card image
Dave, PMDX is considering just such a product and is trying to figure out what things are needed for a real industrial control. Meanwhile, we are actually working on a cape to be used as a test platform at Wichita. It will use the parallel port header approach along with other debugging stuff. It can be used together with PMDX-112/PMDX-111 debugging accessories, or it could simply be used as parallel ports to drive an existing breakout board. The design is based around a programmable logic device to minimize the impact of incorrect assumptions of how the Beagle Bone Black is pinned out and configured. Regards, Steve Stallings www.PMDX.com -Original Message- From: Dave [mailto:e...@dc9.tzo.com] Sent: Sunday, April 28, 2013 9:23 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] ?Beaglebone LinuxCNC starterkit: ready-to-run SD card image I disagree. If you want a killer product for the BeagleBone Black, you need to toss the EPP port concept entirely and have the BeagleBone Plug into the Breakout board - similar to a cape. But make it larger and put 24 volt DC I/O on it, along with analog I/O, Encoder ins, and step and direction I/O. To me that would be an attractive package. I really dislike 5volt I/O for field I/O. 24 volt DC I/O is much more reliable and is the current industry standard. You could have two versions - one for step and direction and another for Analog servo, but I think I would design one board. The only reason anyone ever used the EPP LPT port was because it was cheap and already part of the PC. I have no desire to reuse old BOBs and keep it PC compatible. Dave On 4/28/2013 8:57 PM, dave wrote: Considering the fact that good BOB's cost pretty much what the B3 does being able to plug to current BOB's would be nice. Dave On Sun, 2013-04-28 at 14:55 -0700, Greg Bernard wrote: I'm with Gene on this. For the short term, at least, a parallel port adapter (or 2) would allow existing BOB's to be used. But the ideal would be a dedicated cape that could provide the functionality of a Mesa or Pico Systems board. ++ + Anyone who believes exponential growth can go on forever in a finite world is either a madman or an economist. -Kenneth Boulding, economist How unfortunate that the Earth's first intelligent social animal is a tribal carnivore -E.O. Wilson, sociobiologist From: Gene Heskettghesk...@wdtv.com To: emc-users@lists.sourceforge.net Sent: Sunday, April 28, 2013 4:40 PM Subject: Re: [Emc-users] ?Beaglebone LinuxCNC starterkit: ready-to-run SD card image On Sunday 28 April 2013 17:29:54 Jon Elson did opine: Eric Keller wrote: On Sun, Apr 28, 2013 at 1:55 PM, Jon Elsonel...@pico-systems.com wrote: Is there a consensus about BeagleBone vs. Raspberry Pi? I think it's a no-brainer myself. I have a Raspi, but I just don't see it competing with the bbb OK, this was my take on the hardware, but there was so much RPi discussion here, I thought that might be the way development was headed. I support the Beagle direction, too, and hope much of what I have learned on the original Beagle will port over to the Bone. So, if I were going to make something for the Bone, should it be like a PC parallel port, or some other kind of breakout board? I'd like to make something that allows my parport-connected devices to be used with the Bone, but maybe others would rather have a much wider I/O device, maybe a couple dozen inputs and outputs from the PRU-accessible pins. So, any thoughts would be welcome. Jon Not that I have a dog in this fight Jon, I don't expect to have to replace these atom's I bought anytime soon, but it seems to me it should allow the more or less std 26 pin IDC connector to be used so it could plug straight into our existing BOB's. Here of course I am assuming the .hal file could put the right signals on the right pins. That generally is up to us anyway. Perhaps 2 of the connectors on yours, for those with more I/O needs than one EPP port can supply. But I haven't studied it well enough to know if the PRU has enough I/O to fill up the 2nd connector. That would be pure icing on the cake IMO if it did. Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page:http://coyoteden.dyndns-free.com:85/gene is up! My views http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml There's so much plastic in this culture that vinyl leopard skin is becoming an endangered synthetic
Re: [Emc-users] LinuxCNC would be very nice on the UDOO board.
BeBoPr board comments in-line below. -Original Message- From: Charles Steinkuehler [mailto:char...@steinkuehler.net] Sent: Tuesday, April 23, 2013 11:04 AM To: Enhanced Machine Controller (EMC) Cc: Matt Shaver Subject: Re: [Emc-users] LinuxCNC would be very nice on the UDOO board. On 4/22/2013 11:40 AM, Matt Shaver wrote: On Sun, 21 Apr 2013 19:30:23 +0200 Michael Haberler mai...@mah.priv.at wrote: We'll have a ready-to-go SD card image with xenomai, all prerequisite packages and linuxcnc installed in a week or two; that will include Charles' PRU stepgen and Sergey's/GP Orcullo's emcweb, and should reduce the guru requirements to get things going So, I'm ordering a new Beagle Bone Black this morning I was wondering what you guys are doing for a field I/O interface for this computer. Is there a cape I should get? Or are we at the perfboard and wire-wrap wire stage? :) The BeBoPr board is available now and has support for both the Pololu drivers common in the 3D printer world and a header to drive out-board stepper drivers with a more oomph. From the BeBoPr maunal: J5 - all stepper signals are present on this connector. It connects directly to the 15 pin sub-D connector of a TB6560-4V5 3A stepper driver board sold on e-Bay. The BeBoPr board looks interesting, but it seems like it is not currently possible to purchase one. The following claim to sell it but have no stock: element14/Newark/Farnel Mouser Digikey BoardZoo Digikey states that their stocking order is overdue for delivery. Also I wonder about pinout usage and other documentation. Where is the BeBoPr manual that Charles mentioned? I could not find any info about their assignments of the Beaglebone pins. Perhaps one has to read the code to figure that out. There's also the Replicape, but AFAIK it's on-board stepper driver only (Pololu class, but using TI driver chips). There's nothing I'm aware of yet that works for analog servos, but it should be possible, at least for a few channels (the CPU has 3 hardware encoder inputs, and the PRU could support more in software at lower pulse rates). -- Charles Steinkuehler char...@steinkuehler.net -- Try New Relic Now We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Try New Relic Now We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Pid saturated, was: Servo error
It is evident that discussing servo tuning is going to generate lots of interest and comments. Stephen and Peter both have lots of academic and theoretical background as well as practical experience to go with it. Many of the rest of us only have casual exposure to the concept of the response and tuning of servo loops. In order to help keep this discussion on track and meaningful for those of us in the casual category I would like to suggest that the systems be described completely when making statements about how they behave. As I understand things, Peter is referring to control of brushless DC permanent magnet servo motors with encoders that can provide only shaft position feedback. Velocity, if used, is computed from position. I do not know if the control circuits in Peter's drivers are current mode, voltage mode, or some hybrid of the two. I suspect that they are current mode with the current loop controlled in the drives. Stephen's mill I think has classic +/- 10 volt DC controlled PWM type servo drivers running brush type permanent magnet servo motors with both encoders for position and tachometers for velocity. Stephen stated that they are presently configured as voltage mode so the +/- 10 volts DC signal adjusts the PWM duty cycle and thus the apparent voltage seen by the servo motor. The motor current is not being controlled other than a protective limit on maximum current. This classic type of driver also closes the velocity loop in hardware, so if the motor voltage derived from just the +/- 10 VDC input does not result in the specified speed, then the tachometer feedback will alter the voltage (PWM duty cycle) in an attempt to get the specified speed. This is a servo loop in hardware and the driver should have electronic control adjustments independent of the PID in the LinuxCNC software. I am going to guess that these controls address P (control voltage gain), a gain adjustment for the Tachometer feedback that, and an adjustment related to the time variant response to changes in the control voltage and the tachometer feedback voltage. This last one may be similar in effect to a D term, but is likely not a true D term. As best I know the driver does not have an I term. These types of drivers usually also have an offset or nulling term that may be similar to FF0. All of this is happening in the servo driver, not in the PID software in LinuxCNC, so it is an inside loop. So now, how do we talk about apples to apples comparison of these two control systems? In both cases the PID in LinuxCNC receives only a position feedback and is the outermost loop of the control system that is used to control position. Perturbations to the PID control can come from both changes in the requested position and from changes in the mechanical response to the control system. As I understand it there is a 90 degree phase shift in the response of the position loop between the types of loop control, current-torque, or voltage-velocity and this alone keeps me confused about where the response poles are and how to adjust for them. While it is natural to describe servo systems mathematically, please try to include intuitive descriptions for those of us who are mathematically challenged. Thanks, Steve Stallings -Original Message- From: Peter C. Wallace [mailto:p...@mesanet.com] Sent: Saturday, December 22, 2012 4:55 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Pid saturated, was: Servo error On Sat, 22 Dec 2012, Stephen Dubovsky wrote: Date: Sat, 22 Dec 2012 16:29:39 -0500 From: Stephen Dubovsky smdubov...@gmail.com Reply-To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Subject: Re: [Emc-users] Pid saturated, was: Servo error Peter, I *FULLY* understand. My 8th paragraph states if the drive is poorly tuned (voltage mode = no tuning) and the poles are low in freq (bingo) the D is a bandaid. Voltage mode control doesn't hide/move the plant poles to a higher freq like current mode can. Its simpler but lower performance. Only so much bandwidth a single loop can get if it gets handed all the multi-order system resonances in one black box. Much better to handle each system order at a time (torque,speed,position). The D adds zero which if you put ontop of the next systems pole you can help things out. There are systems that it works in. Buts its a bandaid. Um no, you dont. I was giving advice on how to tune a voltage mode loop, Your advice does not apply in this context. Its very clear that you have not actually tuned a voltage mode loop. D is absolutely needed for stability, A voltage mode drive with velocity feed forward approximates a torque mode loop (a second order system). Without a D term the solution to this system function is a sine wave. Peter Wallace Mesa Electronics
Re: [Emc-users] Pid saturated, was: Servo error
-Original Message- From: Peter C. Wallace [mailto:p...@mesanet.com] Sent: Saturday, December 22, 2012 6:06 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Pid saturated, was: Servo error On Sat, 22 Dec 2012, Steve Stallings wrote: Date: Sat, 22 Dec 2012 17:52:19 -0500 From: Steve Stallings steve...@newsguy.com Reply-To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net To: 'Enhanced Machine Controller (EMC)' emc-users@lists.sourceforge.net Subject: Re: [Emc-users] Pid saturated, was: Servo error It is evident that discussing servo tuning is going to generate lots of interest and comments. Stephen and Peter both have lots of academic and theoretical background as well as practical experience to go with it. Many of the rest of us only have casual exposure to the concept of the response and tuning of servo loops. In order to help keep this discussion on track and meaningful for those of us in the casual category I would like to suggest that the systems be described completely when making statements about how they behave. As I understand things, Peter is referring to control of brushless DC permanent magnet servo motors with encoders that can provide only shaft position feedback. Velocity, if used, is computed from position. I do not know if the control circuits in Peter's drivers are current mode, voltage mode, or some hybrid of the two. I suspect that they are current mode with the current loop controlled in the drives. Stephen's mill I think has classic +/- 10 volt DC controlled PWM type servo drivers running brush type permanent magnet servo motors with both encoders for position and tachometers for velocity. Stephen stated that they are presently configured as voltage mode so the +/- 10 volts DC signal adjusts the PWM duty cycle and thus the apparent voltage seen by the servo motor. The motor current is not being controlled other than a protective limit on maximum current. This classic type of driver also closes the velocity loop in hardware, so if the motor voltage derived from just the +/- 10 VDC input does not result in the specified speed, then the tachometer feedback will alter the voltage (PWM duty cycle) in an attempt to get the specified speed. This is a servo loop in hardware and the driver should have electronic control adjustments independent of the PID in the LinuxCNC software. I am going to guess that these controls address P (control voltage gain), a gain adjustment for the Tachometer feedback that, and an adjustment related to the time variant response to changes in the control voltage and the tachometer feedback voltage. This last one may be similar in effect to a D term, but is likely not a true D term. As best I know the driver does not have an I term. These types of drivers usually also have an offset or nulling term that may be similar to FF0. All of this is happening in the servo driver, not in the PID software in LinuxCNC, so it is an inside loop. So now, how do we talk about apples to apples comparison of these two control systems? In both cases the PID in LinuxCNC receives only a position feedback and is the outermost loop of the control system that is used to control position. Perturbations to the PID control can come from both changes in the requested position and from changes in the mechanical response to the control system. As I understand it there is a 90 degree phase shift in the response of the position loop between the types of loop control, current-torque, or voltage-velocity and this alone keeps me confused about where the response poles are and how to adjust for them. While it is natural to describe servo systems mathematically, please try to include intuitive descriptions for those of us who are mathematically challenged. Thanks, Steve Stallings Thats basically right. I think we are arguing about nothing really. Stevens tuning method is appropriate for first order systems (velocity mode servos or voltage to current loops in motor controls or spindle speed loops) Tuning second order systems (and the bare hBridge systems like the 7I39 approximate a second order system) are tuned differently and depend on the D term for stability. Peter Wallace Mesa Electronics OK, now I still need more education. Why is a bare H-bridge driven with PWM not equivalent to voltage mode? I thought the duty cycle of a PWM drive was effectively integrated by the inductance of the motor such that the percent duty cycle was equivalent to percentage of bus voltage on the H-bridge as far as the motor was concerned. Can you give an intuitive description or examples of a second order system as compared to a first order system? Thanks, Steve Stallings -- LogMeIn Rescue
Re: [Emc-users] Ballnuts
Andy, I have not seen such an arrangement. The ones I have seen have the nut mounted in a carrier first. Things to consider: Are the OD of the ball nut and the centerline of the ball screw concentric? Some castings are offset to help with mounting the return tubes. Is the OD perfectly round? The bearing that you referenced is a very thin section and would easily distort if the OD of the ball nut was out of round. How are you going to attach a pulley to rotate the ball nut? You should be aware of lubrication issues. A spinning nut tends to expel it own lubricant. The industrial ones I have seen provide for lubricant feed into the carrier holding the ball nut. Steve Stallings -Original Message- From: andy pugh [mailto:bodge...@gmail.com] Sent: Tuesday, December 11, 2012 7:04 AM To: Enhanced Machine Controller (EMC) Subject: [Emc-users] Ballnuts Has anyone ever seen a bearing press-fitted to the outside of a ballnut? I am designing a rotating-nut system, and simply pressing the ballnut into the middle of a double-row angular contact bearing would be very simple. I suppose an alternative would be to look at threading a part of the OD of a flanged ballnut. http://simplybearings.co.uk/shop/p150726/3808B2RSRTVH+Rubber+S ealed+Double+Row+Angular+Contact+Ball+Bearing+40x52x10mm/produ ct_info.html For example looks like a very nice fit on the outside of a 2005 ballnut. I suppose I could easily use the next size up and a threaded sleeve. (I only just found that style, I had been looking at wheel bearings, which also look rather usable, relatively slim, and preload adjustable) -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Ballnuts
comment on pulley below -Original Message- From: andy pugh [mailto:bodge...@gmail.com] Sent: Tuesday, December 11, 2012 10:01 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Ballnuts On 11 December 2012 14:49, Steve Stallings steve...@newsguy.com wrote: Are the OD of the ball nut and the centerline of the ball screw concentric? Some castings are offset to help with mounting the return tubes. I would hope that the outer diameter was concentric, as no other register is available. Is the OD perfectly round? The bearing that you referenced is a very thin section and would easily distort if the OD of the ball nut was out of round. Again, it would be harder to make it oval than round, so one would rather hope so. How are you going to attach a pulley to rotate the ball nut? Bolted to the flange. So the ball nut has a flange on one end? Would you need to remove the ball return tubes to press the bearing down the length of the body to get one bearing next to the flange? Guessing here since I do not know what your ball nut looks like. If so, careful of any burrs that may have been raised when the body was machined for the holes associated with the return tubes. You should be aware of lubrication issues. A spinning nut tends to expel it own lubricant. A good point, but one that I will choose to ignore :) -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Stepper response
There are stepper drivers that can extract feedback for detecting missing steps, but they require parameters be set to match the particular motor. One such device is the TMC246 from www.trinamic.com See: http://www.trinamic.com/index.php?option=com_contentview=articleid=171Ite mid=302 I looked at basing a product around this concept but decided that it was not practical to offer a general purpose driver with this function because it would be too hard to support unless you sold matching motors. Steve Stallings -Original Message- From: craig [mailto:cr...@facework.com] Sent: Sunday, November 25, 2012 10:58 PM To: emc-users@lists.sourceforge.net Subject: [Emc-users] Stepper response The post: /Re: [Emc-users] Spindle position, direction and Index with only one channel.// // //On 11/24/2012 5:01 PM, James Boulton wrote:// / /Has anyone on list used a stepper as an encoder like this: http://home.clear.net.nz/pages/joecolquitt/stepper_as_encoder.html James// / got me reconsidering something I thought about some time ago and laid aside because I have the neither the expertise nor the time to investigate it. What useful information can be extracted from sensing stepper voltage and current responses? Are there useful differences in the waveforms for missing steps? nearly missing steps? If there are, the detection of such events could be quite useful. For many application 1 or 2 missing steps before stopping might be quite acceptable. If one could detect such things, one might be able to work much faster in materials with highly variable hardness/ resistance (e.g. knots in wood). or be able to stop replace a dull tool and finish the job still within acceptable tolerances. Inexpensive sensors and microprocessors might be able to implement the needed feature extraction and pattern recognition at relatively low cost. Has anybody seriously looked at this? Does anyone know of good models of stepper physics that could be used to guess what to look for? Craig -- Monitor your physical, virtual and cloud infrastructure from a single web console. Get in-depth insight into apps, servers, databases, vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. Pricing starts from $795 for 25 servers or applications! http://p.sf.net/sfu/zoho_dev2dev_nov ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Monitor your physical, virtual and cloud infrastructure from a single web console. Get in-depth insight into apps, servers, databases, vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. Pricing starts from $795 for 25 servers or applications! http://p.sf.net/sfu/zoho_dev2dev_nov ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] VFD input
A well designed rotary converter can help some with providing usable 3 phase to a VFD, but a static converter is useless because, unlike an actual motor, the VFD has no inductance to work with for phase shifting. Steve Stallings -Original Message- From: Kirk Wallace [mailto:kwall...@wallacecompany.com] Sent: Tuesday, November 20, 2012 11:00 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] VFD input On Tue, 2012-11-20 at 17:28 -0500, Przemek Klosowski wrote: ... snip I can see that, while equalizing the load across the rectifiers, this scheme doesn't help with power variation within the 50/60Hz cycle, so some derating is still called for, I think. ... snip I've given this some thought too. I believe the biggest problem, as Peter mentions, is the current load on the DC bus capacitors while there is no voltage from the single phase. My thinking has been to have a separate rectifier and capacitors to get DC, then feed that into the VFD input, but it's probably cheaper just to buy a larger VFD. A rotary or static phase converter should help too, but then again, it's cheaper to buy a bigger VFD than build or buy a converter. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA -- Monitor your physical, virtual and cloud infrastructure from a single web console. Get in-depth insight into apps, servers, databases, vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. Pricing starts from $795 for 25 servers or applications! http://p.sf.net/sfu/zoho_dev2dev_nov ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Monitor your physical, virtual and cloud infrastructure from a single web console. Get in-depth insight into apps, servers, databases, vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. Pricing starts from $795 for 25 servers or applications! http://p.sf.net/sfu/zoho_dev2dev_nov ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Laser Intensity from Z Value?
I thought it was more traditional to use the S word to treat laser intensity the same as spindle speed. The Pico Systems stuff should already have configurations that present the S word to the DAC for conversion to a voltage. Steve Stallings -Original Message- From: andy pugh [mailto:bodge...@gmail.com] Sent: Friday, November 16, 2012 7:59 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Laser Intensity from Z Value? On 16 November 2012 06:55, Jeshua Lacock jes...@3dtopo.com wrote: I was thinking of controlling my CO2 laser intensity using the Z value in the G-Code. The problem with this is that it puts imaginary corners in the trajectory, and that can make the XY movement stutter. You might find that M67 works better. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Monitor your physical, virtual and cloud infrastructure from a single web console. Get in-depth insight into apps, servers, databases, vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. Pricing starts from $795 for 25 servers or applications! http://p.sf.net/sfu/zoho_dev2dev_nov ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Monitor your physical, virtual and cloud infrastructure from a single web console. Get in-depth insight into apps, servers, databases, vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. Pricing starts from $795 for 25 servers or applications! http://p.sf.net/sfu/zoho_dev2dev_nov ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Crowdsourced mass CNC produced private weapons
It would seem that this is a discussion better suited to some other forum. Please do not let it overwhelm this one. Steve Stallings -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Hold-down straps
At one time mills were rare and shapers common. Shapers actually produce a nicer finish on flat surfaces. Shapers can use single point and form tools for special shaped grooves. Think gear teeth, splines, and keyways. Today many people will keep an old shaper around just because they do a nice job of cutting keyways in pulleys, a job that is not very practical on a mill. Shapers can cut on an angle by using the downfeed on the clapper head. This works for cutting dovetails without needing special cutters. And most important, they are cool to watch! Steve Stallings -Original Message- From: Peter Loron [mailto:pet...@standingwave.org] Sent: Saturday, October 13, 2012 12:59 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Hold-down straps I watched the linked video. Can somebody comment on why you would use a shaper for that work instead of a mill or surface grinder? I'm trying to understand the purpose of a shaper. Thanks. -Pete -- Don't let slow site performance ruin your business. Deploy New Relic APM Deploy New Relic app performance management and know exactly what is happening inside your Ruby, Python, PHP, Java, and .NET app Try New Relic at no cost today and get our sweet Data Nerd shirt too! http://p.sf.net/sfu/newrelic-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [off] Lost PLA Casting
Gene, It looks like he used a crucible lifter to do the pour. The lifter is normally used to place the hot crucible into a pouring holder that makes it easier to tip the crucible by twisting a shank from the side instead of holding it from above. For examples see: http://www.budgetcastingsupply.com/Tongs-Shanks.php Steve Stallings -Original Message- From: Gene Heskett [mailto:ghesk...@wdtv.com] snip But thats an odd bucket for handling the hot alu. What I've used for casting iron was an equally long handled, fireclay covered bucket that we tipped over sideways to pour the iron out by rolling the loop on the other end of the handle to control the pour. In a half knealing position with the left knee sticking out to hold the weight in the middle of the handle. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Bridgeport Stepper Inductance
The Superior Slo-Syn motors used by Bridgeport were 8 wire M112-FJ series motors wired in a 6 wire unipolar configuration. These motors should have an inductance of between 1 and 2 mHenry per winding and were rated for 9 amperes in unipolar mode. This is a guess based on their product chart for standard models with similar ratings. I do not know the exact motor used by Bridgeport, or even if it was a custom. The Sigmas should be similar. If anything, the inductance may be borderline too low for your Parkers. The typical stepper Bridgeport using original motors will run 80 to 100 IPM using G203V drivers with a 72 volt nominal power supply. The servo Bridgeports like the Boss-8 would run about 200. Pushing things beyond that would likely over stress the mechanicals. Regards, Steve Stallings -Original Message- From: N. Christopher Perry [mailto:n_christopher_pe...@me.com] Sent: Thursday, August 30, 2012 12:20 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Bridgeport Stepper Inductance On Aug 30, 2012, at 11:05, Kirk Wallace kwall...@wallacecompany.com wrote: On Thu, 2012-08-30 at 08:55 -0400, N. Christopher Perry wrote: I've got an old CNC Bridgeport Vertical Mill I'm looking to upgrade. I'm fairly sure it is a BOSS 5. It does have stepper motors on in, but haven't had a chance to check whether they are Superiors or Sigmas motors yet. Except for the motors, it looks exactly like this: http://img.photobucket.com/albums/v12/rockrat/new/DSC01640.jpg Anyway, I've got some Parker OEM650 stepper drives on hand and would like to use those for my retrofit, but they will only accommodate phase inductances of 1 - 10 mH. Does anyone know what the inductances are for the Superiors and Sigmas? N.C. Someone is bound to say this, so it might as well be me. From what I hear, the original Boss stepper motor magnets where probably the best they had at the time, but now are pretty awful. I would be inclined to not put any money into the present steppers. I would try to get it running with what you had on hand and see if you can live with it, or go to a servo system (brushed or brushless). I plan to, but I can't commit to swapping them out upfront while upgrading everything else in the system. N.C. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] STOP RIGHT NOW...
Like any self selected participant survey, the results should be taken with a grain of salt. The instigator of this survey was Bob Warfield of CNC Cookbook fame. See: http://blog.cnccookbook.com/2012/07/31/survey-which-cnc-control-do-you-use/ -Original Message- From: Chris Radek [mailto:ch...@timeguy.com] Sent: Friday, August 03, 2012 11:46 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] STOP RIGHT NOW... On Fri, Aug 03, 2012 at 11:42:02AM -0500, Jon Elson wrote: But, I see EMC2 has a REALLY good showing, currently 33%! Well if it's posted on the emc-users list, this is hardly surprising. Matt, how do you want to use these numbers? What is this for? -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Urgent need for spindle motors
Finding a quality spindle that is not designed for collets or other interchangeable tool holders is difficult. Usually these are custom items. You might try: http://www.ekstromcarlson.com/index.cfm/category/2/motors.cfm http://www.pdscolombo.com/info_contact.php Regards, Steve Stallings -Original Message- From: Viesturs Lacis [mailto:viesturs.la...@gmail.com] Sent: Wednesday, July 11, 2012 12:58 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Urgent need for spindle motors So is there really nothing? Can anyone suggest any other manufacturer of compact, square AC induction motor, besides Elte? I am trying to find something on google, but obviously the selection of keywords is not my strength as I do not get anything useful. -- Viesturs If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Servo system and glass encoder scales for positionfeedback
PID control loops are math function implementations that assume no discontinuities or delays in the feedback path, which includes the mechanical parts. Backlash causes discontinuity and will cause the PID to over-respond during the backlash interval. This can be tamed somewhat by reducing gain, but if there is significant backlash, the system will slam back and forth across the backlash and beat the machine to death. Steve Stallings -Original Message- From: erik.555.gr...@gmail.com [mailto:erik.555.gr...@gmail.com] Sent: Tuesday, May 22, 2012 8:44 AM To: emc-users@lists.sourceforge.net Subject: [Emc-users] Servo system and glass encoder scales for positionfeedback Are there any major dis-advantages to using glass scales as position feedback for a servo system versus using encoders directly attached to the motors. I could see where backlash might be an issue but if using precision ground ballscrews -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Increase Damping
snip Hi Jon, Well lets just say the only thing that I am sure about is the drive is under-damped. ;) Tuning is proving to be insanely difficult for me, I guess mostly because I don't really have much of a clue what I am doing. It is also kind of scary because if I turn a POT on the Gecko just a tad in the wrong way the drive violently rattles the whole table. When it was just the Gecko, that was something I had a grip on. But now it is a combination of the Gecko and the PID settings. It may be that I am just trying to accelerate the drive faster than the system can adequately damp it. This gantry is probably close to 200 pounds, and I just don't know how fast I can expect to be able to accelerate it. Does gearing a drive help with this? I seems in my mind it should. Gearing it down further would give me increased torque and resolution so seems like a win win. In the meantime, I will try turning the gain POT down and the D up? Best, Jeshua Lacock Is this a G320 or a G320X? If it is a G320X there are internal DIP switches that can be used to reduce the torque gain which might help with stability. Do your encoders have selectable resolution? A lower resolution might also help tame the excessive response. Regards, Steve Stallings -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Why LinuxCNC website is compromised by Google ?
The aim of the hackers that compromise the LinuxCNC web site is to use it as a free mule to advertize their junk. The mechanism is to show Google (and not the general public) special links that show up in the Google searches. These links then present the desired junk pages when clicked on in the search results. They do no show up to normal users of the web site, so the infection goes unnoticed and the mule continues doing its job. To speed up the re-evaluation process someone with control of the LinuxCNC.org web site content needs to sign up for Google's Webmaster tools (free but secured by proof of web site ownership) and request a re-scan. Regards, Steve Stallings -Original Message- From: Viesturs Lacis [mailto:viesturs.la...@gmail.com] Sent: Thursday, May 10, 2012 4:25 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Why LinuxCNC website is compromised by Google ? 2012/5/10 andy pugh bodge...@gmail.com: What completely baffles me is _why_. If only Googlebot sees the spam, what was the hacker trying to achieve? Just to give a start to some conspiration theories (the following is just my imagination): Somebody (for example, authors of other cnc controllers or ultra-loyal users of some other cnc controller) might not like LinuxCNC becoming more popular, so getting Google to think that site is infected means that Google will tell that to any potential LinuxCNC user (exactly the way original poster pointed out). It would lead to some potential users find other cnc controller more attractive and would affect overall impression about this application. Viesturs -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Why LinuxCNC website is compromised by Google ?
Andy, Perhaps I am wrong, but I think the reason that you find the links going to the correct place is that the LinuxCNC web site maintainers have removed the hack, but Google is still showing the old search results. At one time there was definitely spam content on the web site. Steve Stallings -Original Message- From: andy pugh [mailto:bodge...@gmail.com] Sent: Thursday, May 10, 2012 8:18 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Why LinuxCNC website is compromised by Google ? On 10 May 2012 15:10, Steve Stallings steve...@newsguy.com wrote: These links then present the desired junk pages when clicked on in the search results No, the links always go to the correct LinuxCNC page. I have _tried_ to find the spam sites. -- atp -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Trajectory planning and other topics from a EMC(LinuxCNC) newbie (TheNewbie)
-Original Message- From: Viesturs Lacis [mailto:viesturs.la...@gmail.com] Sent: Thursday, April 19, 2012 11:08 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Trajectory planning and other topics from a EMC(LinuxCNC) newbie (TheNewbie) snip Just like Andy said - if there is curve in the part, then that is why there are G2 and G3 commands in g-code. Period. Doing arcs with linear moves is _wrong_ approach by definition. Put G2/G3 commands in all arcs and let LinuxCNC do its job - slow down the machine, if necessary, so that it can take given acceleration limits and execute the path with max available velocity. There are many cases where short segments are currently the only workable solution. Among these: 1) The arc is not parallel to the XY, XZ, or YZ planes 2) The path is curved, but not a true arc. It could be an oval, an ellipse, or even a spline or nurbs path. 3) The path is from a digitized source using a sample object or a photograph. With increasing usage of 3D modeling these sorts of paths are becoming more common. Steve Stallings -- For Developers, A Lot Can Happen In A Second. Boundary is the first to Know...and Tell You. Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! http://p.sf.net/sfu/Boundary-d2dvs2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] G540 Test Update
Kirk, In every case except the motherboard you describe the waveform as being the same for SPP or EPP mode. This leads me to believe that none of the cards are actually going into EPP mode. What were you using to set the cards to EPP mode? Regards, Steve Stallings -Original Message- From: Kirk Wallace [mailto:kwall...@wallacecompany.com] Sent: Sunday, April 15, 2012 6:09 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] G540 Test Update I have some scope traces from LinuxCNC's pump below. I haven't had time to add text to the pictures yet but I'll try to describe them in this message for now. The group of pictures is here: http://wallacecompany.com/machine_shop/G540/ Motherboard port, set to SPP in BIOS: http://wallacecompany.com/machine_shop/G540/g540_mb_spp.jpg one trace is at 0 V, vertical divisions are 1 V per div., green LED OFF Motherboard port, set to EPP in BIOS: http://wallacecompany.com/machine_shop/G540/g540_mb_epp.jpg green LED ON Rosewill PCI card, set to SPP and EPP, I get the same trace either way: http://wallacecompany.com/machine_shop/G540/g540_rw_sepp.jpg green LED OFF Rosewill PCI card, with 1k Ohm pull-up: http://wallacecompany.com/machine_shop/G540/g540_rw_1kpup.jpg green LED ON Startech PCI card, set to SPP: http://wallacecompany.com/machine_shop/G540/g540_st_spp.jpg green LED OFF Startech PCI card, set to EPP: http://wallacecompany.com/machine_shop/G540/g540_st_epp.jpg swings all the way to 5 V, green LED ON SIIG PCI card, set to SPP and EPP, I get the same trace either way: http://wallacecompany.com/machine_shop/G540/g540_siig_spp.jpg just enough to turn green LED ON SIIG PCI card, with 330 Ohm pull-up, set to SPP and EPP, I get the same trace either way: http://wallacecompany.com/machine_shop/G540/g540_siig_k33pup.jpg green LED ON Horizontal divisions are 50 microseconds/div. One cycle is 4 div. or 20kHZ (?) (base-thread = 10ns, with reset = 1000). -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA -- For Developers, A Lot Can Happen In A Second. Boundary is the first to Know...and Tell You. Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! http://p.sf.net/sfu/Boundary-d2dvs2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- For Developers, A Lot Can Happen In A Second. Boundary is the first to Know...and Tell You. Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! http://p.sf.net/sfu/Boundary-d2dvs2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] G540 Test Update
Kirk, Oops, I now realize that you did get different result for the Startech card in EPP mode. Did you have a utility from Startech to set that board to EPP mode, or did you use one of the utilities from Jon Elson or a similar routine? Steve Stallings -Original Message- From: Kirk Wallace [mailto:kwall...@wallacecompany.com] Sent: Sunday, April 15, 2012 6:09 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] G540 Test Update I have some scope traces from LinuxCNC's pump below. I haven't had time to add text to the pictures yet but I'll try to describe them in this message for now. The group of pictures is here: http://wallacecompany.com/machine_shop/G540/ Motherboard port, set to SPP in BIOS: http://wallacecompany.com/machine_shop/G540/g540_mb_spp.jpg one trace is at 0 V, vertical divisions are 1 V per div., green LED OFF Motherboard port, set to EPP in BIOS: http://wallacecompany.com/machine_shop/G540/g540_mb_epp.jpg green LED ON Rosewill PCI card, set to SPP and EPP, I get the same trace either way: http://wallacecompany.com/machine_shop/G540/g540_rw_sepp.jpg green LED OFF Rosewill PCI card, with 1k Ohm pull-up: http://wallacecompany.com/machine_shop/G540/g540_rw_1kpup.jpg green LED ON Startech PCI card, set to SPP: http://wallacecompany.com/machine_shop/G540/g540_st_spp.jpg green LED OFF Startech PCI card, set to EPP: http://wallacecompany.com/machine_shop/G540/g540_st_epp.jpg swings all the way to 5 V, green LED ON SIIG PCI card, set to SPP and EPP, I get the same trace either way: http://wallacecompany.com/machine_shop/G540/g540_siig_spp.jpg just enough to turn green LED ON SIIG PCI card, with 330 Ohm pull-up, set to SPP and EPP, I get the same trace either way: http://wallacecompany.com/machine_shop/G540/g540_siig_k33pup.jpg green LED ON Horizontal divisions are 50 microseconds/div. One cycle is 4 div. or 20kHZ (?) (base-thread = 10ns, with reset = 1000). -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA -- For Developers, A Lot Can Happen In A Second. Boundary is the first to Know...and Tell You. Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! http://p.sf.net/sfu/Boundary-d2dvs2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- For Developers, A Lot Can Happen In A Second. Boundary is the first to Know...and Tell You. Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! http://p.sf.net/sfu/Boundary-d2dvs2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Hal_parport and EPP
-Original Message- From: Sebastian Kuzminsky [mailto:s...@highlab.com] Sent: Monday, April 09, 2012 6:02 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Hal_parport and EPP snip Simply switching the port to EPP mode doesn't accomplish anything. Simply switching the port to EPP mode DOES accomplish one significant thing. Those outputs that are open collector with pull-ups in regular mode become Totem-Pole driven outputs when in EPP mode. This change is significant for the Gecko G540 which needs the extra drive current when the output is a logic one. The inputs to the G540 are unbuffered optocoupler LEDs and there is no source of power on that side of the interface in the G540, so adding a buffer or additional pull-ups inside the G540 is not possible. Steve Stallings -- Better than sec? Nothing is better than sec when it comes to monitoring Big Data applications. Try Boundary one-second resolution app monitoring today. Free. http://p.sf.net/sfu/Boundary-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Hal_parport and EPP
-Original Message- From: gene heskett [mailto:ghesk...@wdtv.com] Sent: Tuesday, April 10, 2012 10:35 AM To: emc-users@lists.sourceforge.net Subject: Re: [Emc-users] Hal_parport and EPP snip Huh? Maybe my memory is going south, but in a past life I once used the 5 volts supplied by the parport to fix that in one of the shacks old printers. No power was obtained from the printer to do that. ISTR there is a pin on the db25 that has 5 volts on it, limited to half an amp or so with a 10 ohm R intended to be used as a fuse in the event of a load short. Have the (unprintable comment) removed that power src from parportrs these days? The IBM-PC style DB-25 parallel ports do not have +5 volts available. Some other computers that had a Centronics style (36 pin Champ series) connector on the computer end often did have +5 volts available. Steve Stallings -- Better than sec? Nothing is better than sec when it comes to monitoring Big Data applications. Try Boundary one-second resolution app monitoring today. Free. http://p.sf.net/sfu/Boundary-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Hal_parport and EPP
-Original Message- From: gene heskett [mailto:ghesk...@wdtv.com] Sent: Tuesday, April 10, 2012 11:09 AM To: emc-users@lists.sourceforge.net Subject: Re: [Emc-users] Hal_parport and EPP On Tuesday, April 10, 2012 12:00:47 PM Stephen Dubovsky did opine: I don't think a power pin has ever been included in a std parallel port. http://en.wikipedia.org/wiki/Parallel_port According to that, no. But I noted that it says also that pin 25 was not always connected to ground, and in the case I am recalling from 20 some years ago, the parport in question did have 5 volts on pin 25. Serendipity? As I recall, it was on the MFC-3 card in my amiga 2000 at the time. I had assumed, and of course wikipedia didn't exist in 1991, that it was SOP. I sit corrected. :) Well Google to the rescue. According to this page, the Amiga parallel port supplied up to 10 mA of +5 volts on pin 23, not pin 25. In any event, this is an Amiga proprietary setup that is not utilized in the IBM-PC world. http://freecircuitdiagram.com/pinout/871/parallel-amiga-1000-connector/ As an aside, it is fairly common for 26 pin ribbon headers that are intended for ribbon to DB-25 transition cables to have pin 26 (which is not exposed on the DB-25) connected to +5 volts. The SmoothStepper and PMDX products do this but with a jumper to disconnect pin 26 if desired. Steve Stallings -- Better than sec? Nothing is better than sec when it comes to monitoring Big Data applications. Try Boundary one-second resolution app monitoring today. Free. http://p.sf.net/sfu/Boundary-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Mesa counter card?
The issue with sharing encoder signals with both the Gecko servo driver and the PC comes from the fact that the step and direction signals into the Gecko are optically isolated and the encoder and its signal exist on the other side of the isolation barrier. Maintaining the isolation and sharing the signals will require some additional hardware such as this: http://pico-systems.com/gecko.html Regards, Steve Stallings -Original Message- From: Viesturs Lacis [mailto:viesturs.la...@gmail.com] Sent: Monday, April 09, 2012 4:16 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Mesa counter card? 2012/4/9 Jeshua Lacock jes...@3dtopo.com: How is that possible? The encoders are connected to the Geckos, not through the parallel port.. I do not understand, what exactly is not clear to You :) AFAIK Gecko drives will need the encoder signal for them to function, so each encoder signal will have to be splitted/doubled/copied to both PC and Gecko drive. I guess that currently we have a basic misunderstanding due to things not explicitly explained. And I see that You have not explicitly explained, what exactly do You currently have in Your machine. From the way You wrote Your first message I understand that You already have a working system with encoder signal going also to PC: 2012/4/6 Jeshua Lacock jes...@3dtopo.com: My Z axis is about 10,000 lines per inch, so it uses up my available bandwidth really fast. Right now I have the Z's max speed set to a mere 3 inches per sec. My Y is 24 inches per sec, and X is 10 inches per sec. That uses up my available 71khz. So, I understand that something like Mesa's 4I30 4 channel quadrature counter card will allow me much more bandwidth to run my servos faster. What kind of 10,000 lines per inch are You talking about, if that is not encoder signal? It could be also step signal, but encoders were the only thing discussed in that message... Could You, please, expand on what exactly You have there? Where are encoders currently connected? Viesturs -- For Developers, A Lot Can Happen In A Second. Boundary is the first to Know...and Tell You. Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! http://p.sf.net/sfu/Boundary-d2dvs2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- For Developers, A Lot Can Happen In A Second. Boundary is the first to Know...and Tell You. Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! http://p.sf.net/sfu/Boundary-d2dvs2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Marketing LinuxCNC, was Re: Trajectory
So what is the problem? It looks like it is only 3 hours from Grayling to Ann Arbor so you could just run back and forth. 8-) Steve Stallings -Original Message- From: Mark Wendt [mailto:mark.we...@nrl.navy.mil] Sent: Monday, March 19, 2012 4:02 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Marketing LinuxCNC, was Re: Trajectory On 03/18/2012 01:28 PM, Jon Elson wrote: Mark Wendt (Contractor) wrote: Tentative dates for the CNC workshop? Here's the official link at Village Press, the sponsor and coordinator : http://www.digitalmachinist.net/workshop?noredirect=truenored irect=true Jon Crap. Looks like they picked the same weekend as the Grayling MI rodmakers gathering I go to every year. ;-( Mark -- This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] The future of LinuxCNC mailing lists andbug tracking
Gosh, I didn't realize that my ancient solution, Cookie Cop on Windows, was actually working so well. I never realized that SourceForge was loaded with ads until this discussion prompted me to turn it off temporarily. Steve Stallings -Original Message- snip I thought they had adds before, but nothing like what I saw yesterday! It is really distracting. consider installing Adblock Plus in your Firefox and block doubleclick.net(and a few others) j. -- Virtualization Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] DIY output driver
Almost agree having the 10K to ground is still not a bad idea as it will bleed off any leakage from the opto. Note that in your example you assume a beta of 20 and in my example I assumed a beta of 50. Steve -Original Message- From: Przemek Klosowski [mailto:przemek.klosow...@gmail.com] Sent: Thursday, January 19, 2012 5:33 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] DIY output driver On Thu, Jan 19, 2012 at 5:08 PM, Viesturs Lacis viesturs.la...@gmail.comwrote: Hello, folks! I would appreciate some advice or insights, what am I doing wrong. What I want to do is to switch on and off a power to laser engraver diode. It needs 12 VDC supply and it consumes ~1 A currrent. Here is schematics of what I currently have: http://picpaste.com/DSCF6164-vX7heUEq.jpg The problem is that it is not working: Voltmeter was showing +12 VDC on both leads, going to laser module all the time, regardless if I had turned the output pin true or not. What is the voltage of the 'low' state? could it light up the LED? As Steve said, your resistor is in the wrong place. I'd put it on the collector of the phototransistor.; then, the base current of your power transistor would be (12V-0.7V-0.7V)/R; assuming the power transistor beta is 20, you'd need 50mA, i.e. the resistor must be 200 ohm. -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] An alternative way to make encoders.
Ok, but from the logs, somebody is looking at the whole subpage I was curious who it was. Cheers, Gene Weren't me. I can't even get to it from here. ;-) Mark -- Hi Gene, Mark, Well I got there by removing the excess HTTP:// at the front of the posted URL. I did look around at a bunch of your other photos, but the IP address you posted is not me. Mine begins with 70 in the first octet. Cheers, Steve Stallings -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] stepper power supply
Sorry, but a different opinion here Gecko publishes the 67% number based on real world experience with a large number of motors and power supplies tested. The reality of calculating the current needed is daunting. First you start by looking at power, which is what is really being delivered. The Gecko drivers are modern chopping drivers which behave somewhat like a switching power supply. They convert a high voltage moderate current into a lower voltage at a higher, but regulated, current to drive the motor. For the same driver and motor the current drawn from the power supply will be different (lower current) for a higher voltage power supply than for a lower voltage one. Indeed, I have seen drivers overheat simply because the power supply voltage was too low. This is a natural result of the driver delivering a mostly constant amount of power, but having to draw more current to do so. Heating in the driver is dominated by I squared R when the MOSFETs are fully turned on, and twice the current results in four times the heat losses. Things get complicated because the power required is the sum of: 1) mechanical power delivered by the motor 2) mechanical losses within the motor (bearing and air drag) 3) resistive losses ( I squared R ) 4) hystersis losses in the iron (this is often the main cause of motor heating) 5) efficiency of the driver itself Modeling all of the above is a lot of work, even if you do have accurate data to start from. Gecko has stated that the 67% is the most you are going to need assuming you have selected a reasonable power supply voltage and are driving the motor to deliver its maximum mechanical power output. The fact that most machines only move two axes at a time for most operations will mean that the mechanical part of the power is less, but the other factors are not much effected by the mechanical power output. I generally tell my customers that 50% is good enough for typical machines, 67% will provide for anything you can ever hope to achieve, and anything more is purely for bragging rights. Regards, Steve Stallings PMDX -Original Message- From: Dave Caroline [mailto:dave.thearchiv...@gmail.com] Sent: Wednesday, December 28, 2011 1:27 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] stepper power supply The reason they state 67% is because they are not getting the full torque from the motor They are not fully powering both windings and there is an assumption that the motors are not all in the same phase so some windings are partially powered. for full step and full power you power both windings fully. see half step and microstep sections http://en.wikipedia.org/wiki/Stepper_motor Dave Caroline -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Another off the wall thought
The tool cutting brass is one I found amongst some cutters at a clock and watch show It just suited the job, you can also use commercial thread mills eg http://www.kennametal.com/en-US/products_services/metalworking /tapping/t hread_mills/thread_mills_products.jhtml These of course have to be ordered per tpi, and Kennametal has any pricing hidden behind a login screen. Bad dog they be, no biscuit from me. Gene, Maybe try eBay. Item 180765422137 is one example from a seller who has several sizes. On the other hand, $45 for an easy to break carbide cutter is a bit of a thrill that I can live without. Single tooth thread mills like item 190567056928 are also available and offer the ability to cut a reasonable range of pitches with one tool. Again, somewhat pricy and fragile. Cheers, Steve Stallings -- Write once. Port to many. Get the SDK and tools to simplify cross-platform app development. Create new or port existing apps to sell to consumers worldwide. Explore the Intel AppUpSM program developer opportunity. appdeveloper.intel.com/join http://p.sf.net/sfu/intel-appdev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] I feel dumb
If I am not mistaken, your mill has a brushless spindle motor. That would use a different type of driver than the older X series manual mills which were typically equipped with brush type motors. Steve Stallings -Original Message- From: John Stewart [mailto:alex.stew...@crc.ca] Sent: Tuesday, November 15, 2011 9:45 AM To: Chris Reynolds; Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] I feel dumb I wonder - I got a Sieg KX1-NU CNC mill, without controller. It had two boards in it; one was a specific speed controller board, the other was, from my understanding, a common Sieg board. Go to littlemachineshop.com and look at the replacement parts for their smaller CNC mill. (look for replacement parts, CNC machines, 3993 control board, 3501 spindle; it plugs into the motor controller, 3501 spindle board) Ok - the little board had on the screw terminal connections: - isolated power supply; - 110v input; - isolated 5v output; - analog speed in; - ground; - direction; - something else. It was really, really easy to send the +5v, ground, and analog in lines to the Gecko G540 that I put in. I did have to adjust the on-board potentiometer on this little board to give me maximum speed with +5v; as it was probably set up for 0-10v. I wonder if this board would fit in your machine? A bit expensive, but a plug-n-play solution, if your motor controller board is the same. JohnS. -- RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] 3 phase power
-Original Message- From: Brian May [mailto:bri...@diezorlich.com] Sent: Friday, November 11, 2011 7:12 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] 3 phase power snip What is meant by bonded to the ground? Does that mean connecting the nuetral leg of the transformer to the ground? If so, why use the transformer at all when i can just go from a leg to ground? Using the safety ground as a path for the return current instead of using a neutral is not safe because, if the connection between the machine and the safety ground should be loose or fail, then the entire frame of the machine will become electrically hot with respect to the naturally occuring grounded objects nearby. It is also a violation of electrical code and will result in failed safety inspections and rejection of insurance claims if problems are traced to using safety ground as a neutral substitute. Steve Stallings -- RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Engaver Tool Changing
ISO 20 toolholders are nice, but you may wish to investigate the cost of them before making a commitment. They seem to be less readily available at cheap surplus prices. Steve Stallings -Original Message- From: Kirk Wallace [mailto:kwall...@wallacecompany.com] Sent: Monday, November 07, 2011 12:07 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Engaver Tool Changing On Mon, 2011-11-07 at 19:59 +1100, Frank Tkalcevic wrote: ... snip This is a good read. Movie at the end too... http://www.cncathome.com/spindles.html ... snip As Paul says in the video, that's pretty cool. The page saves me from finding out the hard way that something is unlikely to work. Thanks for the link Frank. I am tending towards having the same arrangement with the motor offset and driving the spindle with a belt. Then having the draw bar release cylinder offset opposite from the motor and pushing on the bar through a lever. The NMTB 40 taper will be above the spindle on piers. I think I'll stick with the ISO 20 tool holders. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA -- RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Dust-proof case?
-Original Message- From: Viesturs Lacis [mailto:viesturs.la...@gmail.com] Sent: Sunday, November 06, 2011 5:13 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Dust-proof case? Dave, Kirk, Jon, thanks! 2011/11/5 Dave e...@dc9.tzo.com: What I did to verify that the VFDs were the problem was to run the machine without the VFD powered up - pull the fuses or unwire them.. Then try running parts for an hour or so. Remove the cutters if need be.. . If the problem vanishes you likely have an VFD related noise problem. It is easy to switch the VFD off, but I am having difficulties to come up with a plan, how to check, if the tool takes correct path. I will consult with client's specialists - maybe they can suggest something. 2011/11/5 Kirk Wallace kwall...@wallacecompany.com: My experience seems to indicate: _Always_ have a filter on VFD power inputs. I have a question here: Filters on VFD input lines have been mentioned several time here. Is this something close to what is meant here: http://www.newark.com/tyco-electronics-corcom/10vr6/rfi-power- line-filter-10a-700ua/dp/52K3303 Viesturs, When choosing a filter for the mains power into the VFD, be sure to choose one with a large enough current rating to supply the VFD safely. Your VFD manual should give a rating for the input power source. Do not try to use this type of filter on the output of the VFD. These filters are designed to operate on power that has 50 or 60 Hertz as the fundamental frequency. The output of a VFD will have the inverter frequency (usually between 2,000 and 20,000 Hertz) as its dominant frequency. A motor does not mind because it is an inductive load and will act as its own filter. The interference filter will have capacitors to ground and depending on filter design, these may see much more current than they are designed to handle when the fundamental frequency is above 60 Hertz. There are filters designed for use on the output side of a VFD, but they are larger and more expensive. These are usually sold by the VFD manufacturer. For cost reasons it is usually more practical to try to shield the VFD output by using conduit or a shielded cable. Also note, this is one case where the shield of the cable should be grounded at both ends, unlike most cables that carry signals instead of power. Steve Stallings 2011/11/5 Jon Elson el...@pico-systems.com: You can run memtest86 from the install CD and let it run for at least several hours. This program gets the CPU warmed up and exercises memory heavily. If it finds even a single error, don't bother with anything else until it can run without error overnight. Also, you can run the latency test for a few hours, and exercise web browsers, USB memory stick inserts/removals, glxgears and other operations to see if the latency gets bad. I ran latency test with glxgears and tried to open/close firefox last time I was there. But I think that I ran the test for 15-20 minutes. It was pretty fine - max jitter on base-thread was reaching 25000 ns, but base thread is not used and max jitter on servo thread was around 16000 ns, servo period is standard 1 ms. I recall that I ran latency tests, when I initially installed EMC2 on the machine and there were cases, when max jitter reached 800K ns - almost another servo period. Also that time I ran the test for less than 15 minutes. I will try to figure out, how can I these tests for longer time period without sitting next to the machine - it is several hours to drive from my place. And I think that client will not be happy about machine idling for a whole working day, but I will handle that. Viesturs -- RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Servo PSU
When selecting a transformer, it is not sufficient to just get a 1:1 ratio. The core must not be allowed to saturate. If you take a 120 VAC rated 1:1 ratio isolation transformer and try to operate it on 240 VAC it will likely saturate. When the core is in saturation the normal back EMF does not develop and the winding will look nearly like a short circuit. Not a good thing! Going the other way, operating a winding at less than its rated voltage, is OK. You just get less than the full power that the core is capable of handling. Steve Stallings -Original Message- From: andy pugh [mailto:bodge...@gmail.com] Sent: Wednesday, September 07, 2011 4:35 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Servo PSU On 7 September 2011 07:53, Peter Blodow p.blo...@dreki.de wrote: Yes, but I can't find one. (or not one rated at 15A / 240V anyway) Andy, I have one here that will deliver this power easily. It used to power a hospital supply where all electrical gear must be floating. The only problem would be the shiping since it is very heavy. Where are you, anyway? I am in the UK, and I just realised that I do have a transformer, on fact I have been using it all along during the development phase, a safety isolating transformer. It is interesting watching this conversation develop, as Pete and Dave are both of the opinion that what I have is entirely conventional for a servo drive. I have also just noticed that the transformer I rescued from the skip at work (A 1160VA Siemens one) might work, if I can find a combination of winding taps that gives 1:1. Thanks for the offer, though. -- atp Torque wrenches are for the obedience of fools and the guidance of wise men -- Using storage to extend the benefits of virtualization and iSCSI Virtualization increases hardware utilization and delivers a new level of agility. Learn what those decisions are and how to modernize your storage and backup environments for virtualization. http://www.accelacomm.com/jaw/sfnl/114/51434361/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Using storage to extend the benefits of virtualization and iSCSI Virtualization increases hardware utilization and delivers a new level of agility. Learn what those decisions are and how to modernize your storage and backup environments for virtualization. http://www.accelacomm.com/jaw/sfnl/114/51434361/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OpenCNC paper
I thought Will was still at NIST. He is currently listed as staff there. Steve Stallings -Original Message- From: Eric H. Johnson [mailto:ejohn...@camalytics.com] Sent: Monday, August 29, 2011 8:19 AM To: 'Enhanced Machine Controller (EMC)' Subject: Re: [Emc-users] OpenCNC paper Anders, Will Shackleford went on to work for MDSI. He was there circa 2005 when I visited for training, but at that point I had not realized who he was. OpenCNC was the product that indirectly introduced me to EMC and the reason I ported the VTI driver from EMC to EMC2, as that was the board we were using with OpenCNC. I started out using OpenCNC while playing with EMC as a side project. Needless to say, in the end we went with EMC and dropped both OpenCNC and the VTI board in the process. There really is not much commonality that I could see between the two products. I still have a copy (original CDs) of OpenCNC V6.5. Regards, Eric While browsing the interwebs I came across this new paper Performance analysis of cross-coupled controllers for CNC machines based upon precise real-time contour error measurement http://www.sciencedirect.com/science/article/pii/S0890695511001659 or http://dx.doi.org/10.1016/j.ijmachtools.2011.08.015 It uses MDSI:s OpenCNC controller. Does anyone know if there is any common history of the EMC-project and MDSI's open architecture OpenCNC ? Drop me an email if you are interested in the PDF but are not sitting on a campus with access :) -- EMC VNX: the world's simplest storage, starting under $10K The only unified storage solution that offers unified management Up to 160% more powerful than alternatives and 25% more efficient. Guaranteed. http://p.sf.net/sfu/emc-vnx-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- EMC VNX: the world's simplest storage, starting under $10K The only unified storage solution that offers unified management Up to 160% more powerful than alternatives and 25% more efficient. Guaranteed. http://p.sf.net/sfu/emc-vnx-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Fwd: OT git linix emc marked as phishing site
A couple of months ago, there was indeed an incident related to phishing support on the LinuxCNC.org web site. It was not obvious to regular users of the site because it was just acting as the mule to host the phishing content, not linked to it in any way. A weakness in the older version of Joomla content managment allowed the hack to happen. The phishing content was removed and no one using the site in the intended manner ever noticed. There have now been additional incidents and the hosting company took the precaution of turning the site off. The site maintainers are aware, and are in the process of trying to update the Joomla install and restore the content. Regards, Steve Stallings -Original Message- From: Steve Blackmore [mailto:st...@pilotltd.net] Sent: Saturday, August 20, 2011 2:30 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Fwd: OT git linix emc marked as phishing site On Fri, 19 Aug 2011 22:40:26 -0500, you wrote: re git.linux.org reported as phishing site Summat wrong with linuxcnc.org too Likely been hacked as a plain google search for linux.org shows LinuxCNC.org www.linuxcnc.org/ 28 Mar 2011 - Online store discount with -126% price off for Adobe Acrobat 9 Problems. Our prices: Windows 7 ultimate ($129.90), Microsoft Office ... Photoshop Cs Adobe www.linuxcnc.org/.../lang,english/ Online store discount with -183 ... Download www.linuxcnc.org/.../lang,en/ Online store sale with -142% price ... Documentation www.linuxcnc.org/.../lang,en/ Welcome to LinuxCNC.org. Home of ... Using EMC2 wiki.linuxcnc.org/emcinfo.pl?... Using EMC2. Start EMC2 by choosing ... Forum www.linuxcnc.org/.../lang,english/ Online store discount with -192 ... Office Suite 2010 www.linuxcnc.org/.../lang,english/ Software store sale with -199 ... Online store discount with -199 ... Ocr Word 2010 www.linuxcnc.org/.../lang,en/ Software store sale with -162 ... About www.linuxcnc.org/.../lang,english/ Online store discount with -136 ... EMC2 Supported Hardware wiki.linuxcnc.org/emcinfo.pl?... EmcKnowledgeBase | RecentChanges ... Adobe Online Photo Editing www.linuxcnc.org/index.php?... Online store discount with -105 ... More results from linuxcnc.org ? Bing shows Adobe Acrobat 9 Problems - Sale -127% price off Welcome to LinuxCNC.org Home of users of the Enhanced Machine Controller - EMC a free and powerful machine controller www.linuxcnc.org Steve Blackmore -- -- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] bad news, xylotex died
In general, the G540 has a good reputation. Unlike Xylotex, Geckodrive will repair their products, usually for free. The speed and power of your motors will improve noticably. The G540 does have one design quirk. The inputs are optocouplers driven from just the power of the parallel port buffers. This works OK for motherboard ports that can be put into EPP mode, but may cause issues with PCI based cards if you cannot convince them to run in EPP mode. The difference is that EPP mode drives the control signals (as opposed to data ones) using a totem pole with active pull up. Non-EPP mode uses a passive 4.7K pull up typically and the G540 does not work well with that. In particular the charge pump will fail to operate, but I suspect the same issue applies to the other 3 control pins. I seem to remember you using a PMDX-106 for spindle control. Interfacing that to the G540 could be interesting. You may be able to do without it entirely as the G540 includes an isolated analog output and two open collector relay drivers. Some rewiring will be needed, but it should be workable. Regards, Steve Stallings -Original Message- From: gene heskett [mailto:ghesk...@wdtv.com] Sent: Saturday, July 30, 2011 4:51 PM To: Enhanced Machine Controller (EMC) Subject: [Emc-users] bad news, xylotex died Greetings all; My xylotex went pop,pop,pop when I hit the keyboard for a x move about 2 hours ago. Also the odor of burnt parts was in the air. So, since this will be the 3rd xylotex to expire on me, I am inclined to look elsewhere for the next set of drivers. Looking at the Gecko G540, which isn't that much bigger, but would allow me to raise the motor voltage about 20 volts above what I have now. Its a package that puts 4 each 50 volt, 3.5 amp, 10 microstep G250's in an easily mountable package. I see I can get it for $242 + ship, which is more than the xylotex. What has been the general experience of this group with the G540? Cheers, gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) Be not anxious about what you have, but about what you are. -- Pope St. Gregory I -- Got Input? Slashdot Needs You. Take our quick survey online. Come on, we don't ask for help often. Plus, you'll get a chance to win $100 to spend on ThinkGeek. http://p.sf.net/sfu/slashdot-survey ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Got Input? Slashdot Needs You. Take our quick survey online. Come on, we don't ask for help often. Plus, you'll get a chance to win $100 to spend on ThinkGeek. http://p.sf.net/sfu/slashdot-survey ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Stepperworld FET4 timing and EMC2 Wiki
Aside from the boatload of Acrobat PDF issues common to all web sites when using Firefox, I have no problems reading the EMC WIKI using Firefox 5.0 on W2K. Steve Stallings -Original Message- From: gene heskett [mailto:ghesk...@wdtv.com] Sent: Sunday, July 24, 2011 12:49 PM To: emc-users@lists.sourceforge.net Subject: Re: [Emc-users] Stepperworld FET4 timing and EMC2 Wiki On Sunday, July 24, 2011 01:46:39 PM Christopher Purcell did opine: stepperworld.com does not have anything useful, and no tech support to speak of. Yes. Nothing on EMC2 wiki other than an empty entry. By the way, the EMC wiki is no longer viewable with Safari on the latest Apple Lion (Mac OS 10.7) or on the IPad. Trying to view the EMC2 Wiki results in a too many redirects error. Firefox on Ubuntu 8.04 gives a similar message the page isn't redirecting properly, so that's a clue that this is not a Mac problem. True, I just got it with FF5.02 on linux (copy/paste): Firefox has detected that the server is redirecting the request for this address in a way that will never complete. Different error messages, but common in that all are pointing at the wiki page, or maybe FF. christopherpurc...@mac.com From: John Thornton bjt...@gmail.com Subject: Re: [Emc-users] Stepperworld FET4 timing Date: 24July, 2011 10:41:19 AM ADT To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Reply-To: Enhanced Machine Controller \(EMC\) emc-users@lists.sourceforge.net Do you have a link? Did you check the stepper drive timing page on the wiki? John -- Magic Quadrant for Content-Aware Data Loss Prevention Research study explores the data loss prevention market. Includes in-depth analysis on the changes within the DLP market, and the criteria used to evaluate the strengths and weaknesses of these DLP solutions. http://www.accelacomm.com/jaw/sfnl/114/51385063/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) Corruption is not the #1 priority of the Police Commissioner. His job is to enforce the law and fight crime. -- P.B.A. President E. J. Kiernan -- Magic Quadrant for Content-Aware Data Loss Prevention Research study explores the data loss prevention market. Includes in-depth analysis on the changes within the DLP market, and the criteria used to evaluate the strengths and weaknesses of these DLP solutions. http://www.accelacomm.com/jaw/sfnl/114/51385063/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Magic Quadrant for Content-Aware Data Loss Prevention Research study explores the data loss prevention market. Includes in-depth analysis on the changes within the DLP market, and the criteria used to evaluate the strengths and weaknesses of these DLP solutions. http://www.accelacomm.com/jaw/sfnl/114/51385063/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Anyone coming to the CNC Workshop?
21-24 June 2011 in Ann Arbor, MI full details here: http://bbs.homeshopmachinist.net/showthread.php?t=36635 -Original Message- From: gene heskett [mailto:ghesk...@wdtv.com] Sent: Friday, June 10, 2011 10:03 PM To: emc-users@lists.sourceforge.net Subject: Re: [Emc-users] Anyone coming to the CNC Workshop? On Friday, June 10, 2011 11:02:31 PM Matt Shaver did opine: Steve Stallings and I are coming, and I figure Jon Elson will probably show up as he's a vendor. I think Jeff Epler said he couldn't make it this year on account of prior engagements. How about the rest of you? Hoping to see you soon, Matt -- EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users Where is it to be held, Matt? Cheers, gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) An ambassador is an honest man sent abroad to lie and intrigue for the benefit of his country. -- Sir Henry Wotton, 1568-1639 -- EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] YAGC
There are a couple of other factors that can influence how a G320X acts. The following error limit is presumably set high enough that the drive is not faulting. The encoder resolution will affect the error gain. You can set the pulse multiplier to influence this even if your encoders do not have settable resolution like the CUI ones that Geckodrive favors currently. The G320X is a torque mode drive with settable gain in the current amplifier. See switches 8, 9, and 10. Based on your symptoms, I might suggest trying a lower gain setting. The description in the Current Limit section of the manual incorrectly references switch 10 where it should reference switch 7. This could cause you to set the gain incorrectly. Regards, Steve Stallings -Original Message- From: Tom Easterday [mailto:tom-...@bgp.nu] Sent: Wednesday, May 25, 2011 8:37 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] YAGC On May 23, 2011, at 12:13 PM, Viesturs Lacis wrote: Cool, AXES=8 and COORDINATES=XYZV worked! No more angular jog slider. Good to hear (read)! Thanks! Now on to tuning the servos... Want to share, what are You using? Motors drives? We are using Keling servo motors (http://www.kelinginc.net/KL34-180-90.pdf) and Gecko 320X drives. Pictures: http://gallery.me.com/easterdays#100897 We are having a hard time getting the X axis driver tuned. The Y-axis (with 2 motors) seem to be pretty close to working though we need to better tune the Geckos - need to spend time with the oscilloscope. However, we cannot get the X-axis to work enough to even try to tune it. We get a constant stutter. Depending on the settings of the PID and current limit pots it is either a quick pulsating stutter, or a complete stop, then go, stop, then go kind of stutter.It is more pronounced if we are moving slow (50-150 in/min) and (mostly) not even noticeable if we are moving fast (300-1200 ipm). It may still be there at higher speeds - I may be able to feel a slight vibration - but it is slight if at all at that fastest speeds. Also depending on our pid pot settings we will have faults on every move or if we tune it just right, no faults, but just the bad stutter. We have tried swapping out all the hardware in the path. In fact I wired that axis though completely different path (the Z-axis which is not yet set up) and no matter what I try we cannot get rid of this. We can lessen it by tuning the pots but never fully eliminate it. If we fight the motion of the X-axis carriage (that is, try to pull/push) it as we move it, we can stop the shudder but still feel a vibration during travel. We are really about to give up on the 320X and buy Granites. The only thing I haven't tried is swapping out the motor itself, but I really find it hard to believe that the motor is the problem. Changing the motor is a major ordeal so I will only do this as a last resort. -Tom -- vRanger cuts backup time in half-while increasing security. With the market-leading solution for virtual backup and recovery, you get blazing-fast, flexible, and affordable data protection. Download your free trial now. http://p.sf.net/sfu/quest-d2dcopy1 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- vRanger cuts backup time in half-while increasing security. With the market-leading solution for virtual backup and recovery, you get blazing-fast, flexible, and affordable data protection. Download your free trial now. http://p.sf.net/sfu/quest-d2dcopy1 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Charge Pump on PMDX-131
If you cannot see the signal on pin 17 of your parallel port using an real oscilloscope, then you may have issues with your HAL file bringing the signal to the actual output pin. Also, I would caution that the signal should be somewhere between 100 Hertz and 10 kHz in frequency. Normally the EMC servo thread defaults to 1 kHz which is fine, but since this is a stepper based system, are you sure that you don't have your charge pump signal generator running at the much higher base thread rate? Regards, Steve Stallings -Original Message- From: Mike Cinquino [mailto:mcinqu...@gmail.com] Sent: Saturday, May 21, 2011 2:58 PM To: emc-users@lists.sourceforge.net Subject: [Emc-users] Charge Pump on PMDX-131 Hello, I am attempting to get the charge pump on a PMDX-131 working. I have had this board for years and am just getting around to trying to get this working. I have a charge pump output setup on pin 17 as described in the PMDX-131 manual. Because I was unable to get this to work I also attempted to use a CNC4PC external charge pump board through a PMDX-131 output (Pin 16). This did not work either. I used Halscope to watch the output pin signal and I am getting a signal from EMC2 as expected (at least internally). I then hooked an oscilliscope to the output and did not get a matching signal. I have no signal at all. I connected the CNC4PC charge pump to a signal generator and it worked as advertised. I also have a spindle motor working through PMDX output 1 relay K1. Has anyone used the charge pump on the PMDX-131 with EMC2 successfully? Is there anything obvious that I am missing? My thought is that maybe the buffer on the PMDX can't handle the HZ. I am basing the signal off my servo thread and have manipulated that up and down to but see no output. I changed parallel port cables also. Thanks, Mike -- What Every C/C++ and Fortran developer Should Know! Read this article and learn how Intel has extended the reach of its next-generation tools to help Windows* and Linux* C/C++ and Fortran developers boost performance applications - including clusters. http://p.sf.net/sfu/intel-dev2devmay ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- What Every C/C++ and Fortran developer Should Know! Read this article and learn how Intel has extended the reach of its next-generation tools to help Windows* and Linux* C/C++ and Fortran developers boost performance applications - including clusters. http://p.sf.net/sfu/intel-dev2devmay ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] DTG stands for?
Distance To Go ...? -Original Message- From: forget color [mailto:forgetco...@gmail.com] Sent: Wednesday, March 16, 2011 8:03 PM To: Enhanced Machine Controller (EMC) Subject: [Emc-users] DTG stands for? I've looked in the documentation and can't find an answer. In AXIS, under the DRO pane (adjacent to Preview), what do the DTGX, DTGY, and DTGZ values represent? For that matter, what does DRO stand for? And does the asterisk after each DTG number represent anything? thx! -- Colocation vs. Managed Hosting A question and answer guide to determining the best fit for your organization - today and in the future. http://p.sf.net/sfu/internap-sfd2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Colocation vs. Managed Hosting A question and answer guide to determining the best fit for your organization - today and in the future. http://p.sf.net/sfu/internap-sfd2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Single Phase Lathe spindle motor question
I would recommend against putting 240 VAC into a transformer winding originally designed for 120 VAC. While it would seem that a transformer is a simple ratio device, this assumption falls apart if the iron core cannot support the resulting magnetic flux density. Too little iron and it will saturate. When this happens the winding begins to approximate a very small resistance, almost a short circuit. Using a transformer for voltages lower than rated is generally OK as is running them in reverse. The ratio may prove to be slightly off because the manufacturer may have adjusted the stated ratio to compensate for the losses in the windings but this is typically only a few percent. Steve Stallings -Original Message- From: Kirk Wallace [mailto:kwall...@wallacecompany.com] Sent: Wednesday, March 09, 2011 2:21 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Single Phase Lathe spindle motor question On Tue, 2011-03-08 at 18:52 -0800, Clint Washburn wrote: Are there any VFD's you recommend that would support such a motor? -Original Message- From: Kirk Wallace [mailto:kwall...@wallacecompany.com] Sent: Tuesday, March 08, 2011 12:00 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Single Phase Lathe spindle motor question On Mon, 2011-03-07 at 22:03 -0800, Clint Washburn wrote: I am in the process of converting my 1978 Hitachi Seiki CNC lathe to EMC. It currently has a 7.5 KW dc motor that used to be powered by FUJI SCR ... snip It might be hard to find a VFD rated higher than a few HP that can run on 240VAC input. http://www.automationdirect.com/adc/Overview/Catalog/Drives/GS 2_%28115_-z-_230_-z-_460_-z-_575_VAC_V-z-Hz_Control%29 Short URL: http://alturl.com/qhdpo The higher HP drives seem to need 460VAC. I bought a VFD from eBay and forgot to check the input voltage. It turned out to be a 460VAC unit. I have a left over 240 to 120 transformer that I now have 240 feeding the 120 end, and get 480 out the other. The VFD works fine on this, but the transformer is quite a bit bigger and heavier than the VFD. My guess is that if you scan eBay for a 10 HP VFD that you will only find units that need 460VAC. A transformer could fix this, but it would need to be big and probably expensive. 10 HP would need around 35Amps at 240 so keep this in mind too. I suppose a 40Amp dryer outlet would work. You will most likely need a mains filter too. I kind of like Jon's idea of trying to keep the DC motor. I was thinking a golf cart driver might work, but I think the output voltage will be too low. Maybe an EV controller? http://www.evsource.com/tls_controllers.php These seem too expensive though. Maybe AC is the way to go. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA -- Colocation vs. Managed Hosting A question and answer guide to determining the best fit for your organization - today and in the future. http://p.sf.net/sfu/internap-sfd2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Colocation vs. Managed Hosting A question and answer guide to determining the best fit for your organization - today and in the future. http://p.sf.net/sfu/internap-sfd2d ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Multiplexers
HI John, Here are two links that might help: This one is an off the shelf Arduino shield that uses the Max6675 with an ADG608 Multiplexer IC http://www.oceancontrols.com.au/KTA-259.html This one is an application note from AD about thermocouples. See page 7 for multiplexer hints. http://www.analog.com/static/imported-files/application_notes/34661261AN369. pdf Cheers, Steve Stallings -Original Message- From: John Thornton [mailto:bjt...@gmail.com] Sent: Sunday, February 13, 2011 9:00 AM To: EMC Mailing List Subject: [Emc-users] Multiplexers In my continuing search to get temperature information into the computer at a reasonable cost I came across a neat thing called a multiplexer. I'm sure all of you know about them all ready :) but I'm a little slow in electronics. Anyway my thought is to use a multiplexer to get 4 thermocouples into one MAX6675. This would make the MAX6675 a much more attractive way to read temperatures. The big question is what multiplexer to use, there are thousands of them! On my prototype shield on the Arduino Uno I have one SOIC pad for the MAX6675 and one DIP area that can handle up to a 20 pin DIP chip. Googling for Arduino and multiplexer I came across one example that mentions using a 4051 chip. Doing a search on DigiKey for 4051 turns up quite a bit to pick from and after drilling down to 16 pin DIP packages a page full. Seems like most of the differences are on-state resistance, voltage supply source, voltage supply, current supply... I also came across this package from down under that is doing the same thing using an ADG608 multiplexer. Searching for that on Digikey I see it comes in a 16 pin DIP package. I wonder if that would be a better choice? http://www.oceancontrols.com.au/KTA-259.html Any suggestions are welcome on picking one. Thanks for all the help so far on this. John Thornton -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: a fun toy, the Best Buy Insignia Infocast
Well according to the schematics posted here: http://files.chumby.com/bunnie/silvermoon_oem/silvermoon_OEM_ref_v3.pdf ... the processor is a Marvell 88AP166-A0-BJD2C008 http://www.marvell.com/products/processors/applications/armada_100/ http://www.marvell.com/products/processors/applications/armada_100/armada_16 8/pxa_168_pb.pdf -Original Message- From: Jon Elson [mailto:el...@pico-systems.com] Sent: Monday, September 27, 2010 11:27 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] OT: a fun toy, the Best Buy Insignia Infocast Oh, wow! Not only the processor, but the touch screen too, for $170! I've been working with the Beagle board, which is a quite impressive CPU, with USB and SD card for hard drive, plus XDVI video. Runs Linux of your choice great. The ARM maintainer for RTAI is currently working on an RTAI port, but it isn't done yet. It uses the OMAP3530 CPU. What CPU is in the Infocast? Jon -- Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Do I understand the EMC/HAL/UI - source for MPG encoders
Pardon me, but I want to do a small bit of marketing here. PMDX offers the same encoder for a lower price and with less shipping cost. We sell for $63.00 and ship for $7.00 in the USA. http://www.pmdx.com/MPG-01 Our delivery times should also be quite a bit faster given the time it takes to ship from Hong Kong is estimated as 7-10 days and we ship USPS Priority Mail which offers delivery in 2-3 days in the continental USA. We also offer E-Stop switches, motor connectors, and other accessories, in addition to our line of circuit boards for CNC interfaces. Regards, Steve Stallings PMDX -Original Message- From: Jon Elson [mailto:el...@pico-systems.com] Sent: Monday, August 30, 2010 11:38 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Do I understand the EMC/HAL/UIarchitecture properly? Igor Chudov wrote: Jon, do you have some examples of this that I can look at online, thanks a lot I thought I had a picture of my new pendant on my web pages, but I don't see it. Here's a link to an eBay auction for the encoder : http://cgi.ebay.com/?item=260507682751 Jon -- This SF.net Dev2Dev email is sponsored by: Show off your parallel programming skills. Enter the Intel(R) Threading Challenge 2010. http://p.sf.net/sfu/intel-thread-sfd ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net Dev2Dev email is sponsored by: Show off your parallel programming skills. Enter the Intel(R) Threading Challenge 2010. http://p.sf.net/sfu/intel-thread-sfd ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Quieting The Variable Frequency Drive (VFD) Noise.How To.
A common-mode choke is designed to act on the effect of the net current that flows through all of the lines at the same time. This is opposite of the differential receivers that try to ignore the voltages that arrive common mode from a cable. The major reason to use a common mode choke on the output of a VFD is because, the VFD output is PWM modulated which causes large voltage swings even when not much motor current is needed. These swings will produce high frequency current spikes due to capacitive coupling between the motor windings to each other and to the metal used for magnetic poles in the motor. A choke is an inductor, and thus tries to inhibit high frequency current spikes. Inductors suffer from a problem called magnetic saturation. The core material can only support so much magnetic field. Once the current is great enough to cause saturation, the apparent inductance drops dramatically and the filtering effect is reduced. Because motors consume large amounts of current, large magnetic cores would be needed to support these large currents if three individual chokes were used on the 3 phase lines. Common mode chokes take advantage of the nature of the 3 phase power waveform. If you sum the currents in the 3 phases, the net result is zero, assuming no leakage and ignoring the effects of capacitance. Therefore, if you build the choke so that the current in the three phases is adding field strength into the same magnetic circuit in the core, the net field is zero and a smaller inductor can be used. The 3 phase power is effectively differential and causes no net field. Now the inductance only has to deal with the current spikes caused by the PWM voltage waveforms exciting the capacitive coupling and a smaller magnetic core can be used. Regards, Steve Stallings -Original Message- From: Don Stanley [mailto:dstanley1...@gmail.com] Sent: Friday, July 30, 2010 3:20 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Quieting The Variable Frequency Drive (VFD) Noise.How To. On Thu, Jul 29, 2010 at 1:17 AM, Jon Elson el...@pico-systems.com wrote: Hi Jon; My 3 phase experience is mostly practical with a basic knowledge of the principles. I think you are saying much more than I am getting in the following statements. I will say what I think I am getting for each and where there is more could you please elaborate? If the windings for each phase run parallel, Three cores in a row sharing the ends. The coils are advertised as patented bobbin windings. that is a common-mode choke, I understand common-mode in cabling and assume the same principal but not sure of all this means. and there the main motor currents all cancel out, This is a ?? for me. so laminated cores should be fine. My question is, in what circumstance would it not work, so I can avoid that in the future. When I teach technical classes my first statement is the only stupid question is the one you never ask. I know this is not a class but you have knowledge I am lacking. Jon, I hope this is not a bother. Many Thanks Don (Details) -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://p.sf.net/sfu/dev2dev-palm ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://p.sf.net/sfu/dev2dev-palm ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://p.sf.net/sfu/dev2dev-palm ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Lathe ATC integration
Sorry, but the pawl is essential to how it operates. The counter rotation is limited by the pawl to the exact position where the tool should rest. These tool turrets will only work with the spindle rotating in the normal direction, pushing the tool back against the pawl, but they do work well for such a simple design. They were used by Southbend, Emco Maier, and many others. Steve Stallings -Original Message- From: Stuart Stevenson [mailto:stus...@gmail.com] Sent: Sunday, July 25, 2010 6:33 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Lathe ATC integration I don't know the physical requirements. If the pawl is not needed for rigidity but is only used for positioning then with an encoder the pawl can be removed. On Sun, Jul 25, 2010 at 5:10 PM, Chris Radek ch...@timeguy.com wrote: On Sun, Jul 25, 2010 at 06:44:31PM +0100, John Prentice wrote: For an 8 position turret you have a ratchet with 8 teeth and a spring-loaded pawl. Assuming you know where you are now (say tool 2) and each click needs 100 steps. To move to tool 5 you output 330 steps. You now know that ratchet is about 30 steps after a click. Send 40 reverse steps. The stepper stalls, as you say, but you are in the known position for tool 5. Next move to say tool 6 just outputs 130 steps forward and 40 back. OK, that's kind of what I was afraid of. Sounds like you need a position mode stepgen, so you can issue the particular number of steps you want. But when you are done with your +130 and -40, your position mode stepgen doesn't know the position anymore because the motor has stalled. The position commands for the next tool change would then have to be slipped by 10 steps worth of position to make up for the lossage (which you assume is 10 but probably isn't exactly.) I don't see a good way to do this with the stock stepgen. Maybe a totally different component is needed. You still have the problem of not knowing what position it's in when you start up (or even if it's in a valid position). If it starts between positions, it won't correct itself. Now let me continue on with what I'd do in this position: If you add an encoder with index, all these problems are solved. Upon startup you can seek the index position. Once you have done that, you have exact position information forever, no matter what the stepper does. You can use velocity mode stepgen then, and you know exactly when (at what position) you have to reverse to find the pawl. You know whether the tool change has completed successfully because the turret will be in the correct position. Then the tool change procedure would look like: 1. If you have not yet found index this run, do that, then continue on 2. Turn forward until the reversal position for the requested tool 3. Turn backward until the lock position for the requested tool 4. Tell stepgen to stop 5. If still at the lock position, report that the tool change is OK Note that between 4 and 5, the stepgen will decelerate to a stop, so extra steps will be issued. If the pawl didn't lock for some reason, step 5 will fail and you won't go on to crash with an unlocked turret. While you can manage without feedback, I think adding it would change this troubled design into a system that works reliably and safely. After typing all that I see that neither configuration is going to be very simple to set up. Chris -- This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- dos centavos -- This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://ad.doubleclick.net/clk;226879339;13503038;l? http://clk.atdmt.com/CRS/go/247765532/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Spindle Noses
These bolt holes are used for mounting large face mills. They use a centering plug in the taper but do not rely on a drawbar to hold them into the spindle. The plug is not a permanent part of the face mill, but rather an accessory used with an other face mills. -Original Message- From: Andy Pugh [mailto:a...@andypugh.fsnet.co.uk] Sent: Wednesday, June 30, 2010 10:03 AM To: Enhanced Machine Controller (EMC) Subject: [Emc-users] Spindle Noses My milling machine has 4 M10 holes on the face of the spindle. (It is a 30 INT). it appears that these are part of the specification for 30INT. Has does anyone know what they are for? http://i200.photobucket.com/albums/aa294/oldtiffie/machine_tap ers/Machine-taper5.jpg -- atp -- This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Jog under PAUSE / tool cnange
One of the many problems with Jog under Pause is that a pause can interrupt a partial move. Run From Here can get you back to the beginning of the interrupted move. How hard would it be to have EMC figure out how to break the interrupted move into two pieces so that it could bring you back to the splice point? Could this be successfully managed even if the interrupted move was in a subroutine? If it could be done, it should be a way to allow tool offsets to be altered during the pause. Regards, Steve Stallings -Original Message- From: Kenneth Lerman [mailto:kenneth.ler...@se-ltd.com] Sent: Monday, May 17, 2010 7:39 AM To: emc-users@lists.sourceforge.net Subject: Re: [Emc-users] Jog under PAUSE / tool cnange I've taken the liberty of memorializing John's post (without what he refers to as a rant that may be removed) at: http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?WhyManualWhilePausedIsHard I've also added a link to it from the page: http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?ManualWhilePaused [I've assumed that is OK with John -- if not, please delete it.] Regards, Ken -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Jog under PAUSE / tool cnange
Normally I am a top poster, but I will try to insert my replies below as Stephen did. -Original Message- From: Stephen Wille Padnos [mailto:spad...@sover.net] Sent: Monday, May 17, 2010 10:15 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Jog under PAUSE / tool cnange Steve Stallings wrote: One of the many problems with Jog under Pause is that a pause can interrupt a partial move. Neglecting specially-shaped cutters (keyway, T-slot), and also neglecting niceties like tangent arc entries to arc moves (probably impossible since EMC doesn't know what the part is), this isn't a huge issue. Linear moves are trivial to continue from where they were left off, and arc moves aren't terribly hard (simply save the center point and radius, and you can figure out where in the arc the program was stopped. It's not necessary to go to exactly that spot, and in fact it would be nice to have an option of backtracking along the move a little anyway) Backtracking would be nice, but I figure it is best to keep the problem and proposed solution as simple as possible at first. Run From Here can get you back to the beginning of the interrupted move. This is probably the best thing to do in most cases anyway, the notable exceptions being loong moves (boring!) or canned cycles. In this case, I am only considering Run From Here as that seems to me to be the only way to reliably restore the machine state. How hard would it be to have EMC figure out how to break the interrupted move into two pieces so that it could bring you back to the splice point? Or close to the splice point - easy. In fact, I think there's a variable in the motion controller that goes from 0 to 1 as a move is executed - it lets the motion controller know how far it has to go in this move. (I don't know the specifics, I just recall that there's a variable for that) Yes, I was hoping that after Pause brought the machine to rest, that there would be information available about exactly where along the cut path the machine stopped. Reversing the math of offsets etc. to determine the proper values in G code to represent the location where the machine Paused will be tough because (I assume) that this information is only available in absolute machine coordinates. Could this be successfully managed even if the interrupted move was in a subroutine? Depends on where you do the interrupting. The motion controller sees a bunch of motions in the queue, not a loop or subroutine. It does arcs and lines, and manages blending between them (as well as accel/vel constraints and such). A subroutine or loop just results in more than one motion being put in the queue. Note that variable values, loop conditions, etc. are all irrelevant at the motion controller level - all the motion parameters are just numbers at this level. Hopefully using the Run From Here approach would recreate the current machine state accurately. The only place I expected to get down to the motion control level was in extracting the information needed to break the motion command into two parts. If it could be done, it should be a way to allow tool offsets to be altered during the pause. It seems a lot of people either didn't fully read John's email, or didn't fully understand the implications of it. (I'm just responding to Steve because this happens to be the last email I read - nothing personal :) ) Offsets are applied in the interpreter, and the already-offset motions are queued for the motion controller to execute. If you change the tool offset, the queue has to be discarded and re-filled with a new set of offset motions. Executing G-code can change the interpreter state, e.g. by changing variable values (or coordinate offsets, G90/91 motion modes ...). This increases the complexity of re-running code quite a lot, since we would need a way of returning the interpreter to the state it was in when the executing motion was queued. That's not an easy problem. No offense taken about understanding John's comment. I acknowledge that I am trying to fiddle with the design of something that I have not taken the time to fully understand. In my defense, I did say that I only expect the proposed approach to work if you are willing to use Run From Here to re-read and process the file to re-establish the valid machine state. One thing I now see that I overlooked is the effect of blending on the data available for constructing the splice point. Steve Stallings -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Jog under PAUSE / tool cnange
Big misunderstanding on my part here. I thought that Run From Here would re-read and reprocess the entire program up to the point that you wanted to start cutting. Steve Stallings -Original Message- From: Slavko Kocjancic [mailto:esla...@gmail.com] Sent: Monday, May 17, 2010 10:52 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Jog under PAUSE / tool cnange Offsets are applied in the interpreter, and the already-offset motions are queued for the motion controller to execute. If you change the tool offset, the queue has to be discarded and re-filled with a new set of offset motions. Executing G-code can change the interpreter state, e.g. by changing variable values (or coordinate offsets, G90/91 motion modes ...). This increases the complexity of re-running code quite a lot, since we would need a way of returning the interpreter to the state it was in when the executing motion was queued. That's not an easy problem. - Steve There is one (nasty) thing when run from line is applied. The queue is cleaned and program resume from selected line but not with correct modal parameters! For example: I run the program and somewhere hit stop. I do whatever I want and after that resume from selected line. Or example 2: I just finish very long roughting part and decide to turnoff machine beacouse is time to go to sleep. In next day just turn on machine select proper point on program (eg finishing pass) and start from selected line. ... and got error like F parameter not set or similar nonsense As run from selected line just do RUN FROM SELECTED LINE! and if machine is metric and in 1'st line you have G20 then part come out realy big. and if somwhere within program some variables are set after Run from selected line they have big chance to be wrong. So be aware from STOP / JOG(go to take beauty sleep) / Run from selected Line sequence. Can be very unpredictable. The solution is that when Run from selected line is executed the parser run program from start without motion til got selected line. Of course this is not easy too. Just imagine probe move here :D Slavko. -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
