Re: [Emc-users] Well, thats the end of aliexpress.com for me

On 02/01/2016 12:01 PM, andy pugh wrote: > On 1 February 2016 at 17:40, Jon Elson wrote: >> The US was the ONLY developed country that was not left in >> total ruin in 1945. (Well, Britain wasn't all that bad.) > Britain had intact government and institutions, but the maj

Re: [Emc-users] Well, thats the end of aliexpress.com for me

On 02/01/2016 12:44 AM, John Dammeyer wrote: > So the deck is stacked against Canadian companies in all sorts of > directions. > Well, the only hope is to find a niche so small that the Chinese copycats can't be bothered to copy what you are doing. Jon -

Re: [Emc-users] Well, thats the end of aliexpress.com for me

On 02/01/2016 12:44 AM, John Dammeyer wrote: > Hi Jon, > I can buy 100 pieces at $8.622 each in Cdn. which is about $6.15US or > $862.20 Cdn total ($615.00 US). > http://www.digikey.ca/product-detail/en/DSPIC30F5011-20I%2FPT/DSPIC30F5011-2 > 0I%2FPT-ND/691581 > > The US site lists 100 pieces at $5

Re: [Emc-users] Well, thats the end of aliexpress.com for me

On 01/31/2016 11:29 PM, Jon Elson wrote: > On 01/31/2016 11:10 PM, John Dammeyer wrote: >> In Canada we pay in Canadian dollars and the prices of the parts are >> suitably inflated past just the exchange rate. There is no minimum and >> shipping is a flat $8. I'm on

Re: [Emc-users] Well, thats the end of aliexpress.com for me

On 01/31/2016 11:10 PM, John Dammeyer wrote: > In Canada we pay in Canadian dollars and the prices of the parts are > suitably inflated past just the exchange rate. There is no minimum and > shipping is a flat $8. I'm on Vancouver Island and FedEx delivers the > Digikey stuff overnight unless the

Re: [Emc-users] Well, thats the end of aliexpress.com for me

On 01/31/2016 06:34 PM, Leonardo Marsaglia wrote: > A question about pricing on FPGAs, and just out of my curiosity. Why is it > the most expensive ones cost over 50k dolars? I know they have great > paralelism capabilities and a lot of IOs but god those are expensive! > > Well, seems their only cu

Re: [Emc-users] Well, thats the end of aliexpress.com for me

On 01/31/2016 05:18 PM, Gene Heskett wrote: > Both of the above have minimum orders for me that are quite costly for a > 10 pak of anything in the transistor 10 cent to 5 dollar price range. Hmmm, I guess I order enough stuff at a time that I totally forgot there's a minimum order! But, if you hav

Re: [Emc-users] Well, thats the end of aliexpress.com for me

On 01/31/2016 08:50 AM, Gene Heskett wrote: > The cro-magnun filling the order has no clue about the care and feeding > of mosfet transistors, so the 10 pack I ordered were arranged as 2 rows > of 5, with the legs interdigitated, bound in scotch tape as a slab to > fit nicely in a China Post envelo

Re: [Emc-users] Creating G-code?

On 01/30/2016 11:03 AM, Chris Albertson wrote: > What are people here using to create G-code? I am looking for options. > > I have an old version of Bobcad/CAM, but it is cumbersome to use, so I rarely use it. Instead, I have written a bunch of c programs that write efficient G-code for the typ

Re: [Emc-users] VFD

On 01/29/2016 03:19 PM, Gene Heskett wrote: > Greetings; > > The VFD, on closer inspection, has its terminals for power input labeled > as for a 3 phase power input unit. So I guess I contact the vendor thru > ebay and ask for a single phase 220-250 volt model. > > I've been running two 3-phase onl

Re: [Emc-users] VFD Noise

On 01/28/2016 08:14 AM, Jim Craig wrote: > An update and semi success story. > > After dinking with the noise from the GS1 VFD for way to many hours. I > was finally able to get rid of the noise. I removed the drive. I put in > a run capacitor and have the coolant pump running off the original > co

Re: [Emc-users] Rigid tapping speed advice

On 01/23/2016 02:27 AM, Gene Heskett wrote: > I would appreciate a PM'd copy of that, "just in case". It is online, at http://pico-systems.com/gcode.html Look near the bottom for "Thread Milling". You need to bore the hole to about the minor diameter of the thread first. Jon --

Re: [Emc-users] Rigid tapping speed advice

Hmmm, one other way to do this, if you don't have a lot of holes to do, is a single-row thread mill. traditional thread mills are good for only one thread pitch. Single row thread mills only have one row of cutting edges, so you run a pass much like a single point threading operation, but with

Re: [Emc-users] Rigid tapping speed advice

On 01/22/2016 09:58 AM, tom-...@bgp.nu wrote: > I need some advice rigid tapping on an Emco120p lathe. > When I ran my first attempt at 300 rpm the tap went in, perhaps to full > depth, and then stalled. Well, if your spindle stalled, I'm not sure you have any real options. Even peck tapping is

Re: [Emc-users] Not as useful as I thought

On 01/22/2016 04:08 AM, andy pugh wrote: > I was having trouble sleeping last night, I was obsessing about CNC > machine wiring. > In an attempt to break the cycle I went on eBay and bought > http://www.ebay.co.uk/itm/291551363807 That's an amazing device, at that price! Thanks! > > In the cold

Re: [Emc-users] 4 ton project?

On 01/21/2016 06:45 PM, lloyd wilson wrote: > I just went to look at a '80s Bridgeport VMC with Heidenhain controller > and Fanuc yellow cap servos (didn't get inside a cabinet for closer > investigation - yet). The beast has a tool changer and a bad controller. > Anyone have experience with that p

Re: [Emc-users] mesa card choice and config

On 01/21/2016 04:26 PM, claude wrote: > I did have expectation to deliver some hardware interface solution for > linuxcnc (I'm hardware electronic senior), but honestly, between the > definition of the product, the conception, the driver and the continuous > evolution of linux, with all the differ

Re: [Emc-users] mesa card choice and config

On 01/21/2016 12:41 PM, John Dammeyer wrote: > I'm a little puzzled. > > Lately the discussion on servos and LinuxCNC appears to give the impression > that the only solution is a PC and boards from Mesa. Does that mean > LinuxCNC has now become a defacto Mesa product? > Well, I sure hope not! Pic

Re: [Emc-users] VFD Tweaking

On 01/20/2016 05:17 PM, andy pugh wrote: > I will get the lathe fully functional first, then decide > on head bearings. Bearings are listed as 387/382B Which > are available and not as frightening as I feared: > http://simplybearings.co.uk/shop/p40679/Major-Brand-387/382B-Imperial-Taper-Roller-B

Re: [Emc-users] camview-emc?

On 01/20/2016 06:55 AM, Gene Heskett wrote: > I take it you've not made it work with our wheezy install > either? I tend to lag the pack quite a bit! I think I'm still running 2.5.x here. Jon -- Site24x7 APM Insight:

Re: [Emc-users] camview-emc?

On 01/19/2016 09:30 PM, Gene Heskett wrote: > On Tuesday 19 January 2016 22:02:13 Jon Elson wrote: > >> >> UGH! Camview is a TOTAL can of worms. > > Burns a huge hunk of cpu time when its running, so you have to creep up > on the target at about 5 thou a minute bec

Re: [Emc-users] camview-emc?

On 01/19/2016 10:25 PM, Jon Elson wrote: > On 01/19/2016 09:30 PM, Gene Heskett wrote: >> On Tuesday 19 January 2016 22:02:13 Jon Elson wrote: >> >>> >>> UGH! Camview is a TOTAL can of worms. >> Burns a huge hunk of cpu time when its running, so you have

Re: [Emc-users] camview-emc?

On 01/19/2016 06:37 PM, Gene Heskett wrote: (Darn, hit the wrong button again...) > the next step is to make camview-emc work > again as it stopped working when I update to the hybrid.iso, which is > mostly wheezy. > UGH! Camview is a TOTAL can of worms. I DID manage to get it working on two sy

Re: [Emc-users] camview-emc?

On 01/19/2016 06:37 PM, Gene Heskett wrote: > Greetings; > > > I sent an email to the address in the README, asking if a fix for wheezy > had been done, this about 24 hours ago, but no reply has been received > yet. > > Is anybody else any smarter about this than I am? > > I have 2 ea 13watt daylig

Re: [Emc-users] very low speed motion

On 01/19/2016 10:24 AM, Peter C. Wallace wrote: > > What I think happens in a step /dir system is this: > > Linuxcnc uses floating point numbers for positions and velocities and these > vary in a stepwise manner at the the servo thread period. If you command a > move with a .001 mm/sec velocity and

Re: [Emc-users] very low speed motion

On 01/19/2016 09:45 AM, TJoseph Powderly wrote: > > clear me up on in this... > about very slow motion with steppers and servos > > assuming the minimum position change is .001mm > ( commanded step or feedback unit > so: a single step moves .001" > and any feedback has .001 resolution ) >

Re: [Emc-users] Question about closed loop CNC

On 01/19/2016 01:04 AM, Chris Albertson wrote: > I've read that it is hard to use steppers for closed loop CNC. If this is > still true could some one explain the theory. Stepper drivers have fixed current settings for the windings. When the load increases, the voltage applied by the driver may

Re: [Emc-users] A heads up on IDC ribbon connectors from China

On 01/13/2016 06:15 PM, Gene Heskett wrote: > Greetings; > > A heads up on Chinese made DB25's. > > Always before, the 'merican db25 IDC's I have used, have had a 26th track > that is not connected to anything within the cap and cable seating area > so they fitted 26 conductor cable nicely. > > The

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

On 01/13/2016 11:26 AM, Wayde Allen wrote: > I just joined the email list since I'm wondering about using Linux CNC to > retrofit the control system on an old Cincinnati/Milacron CNC system. The > motor control amplifier for these machines seems to be a Kollmorgen BDS4. > Has anyone here created an

Re: [Emc-users] Stepper Motors/Drives

On 01/13/2016 10:09 AM, Rick Lair wrote: > Hey Guys, > > I have never dealt with stepper motors/drives and one of the guys at our > shop is kicking around converting and old 9x30 Southbend lathe to cnc > using Linuxcnc. Are there any recommendations on maybe some kits with > all the power stuff (mo

Re: [Emc-users] VFD Tweaking

On 01/07/2016 05:14 PM, Stephen Dubovsky wrote: > FWIW, I have a 7hp hitachi vfd on my Sheldon R15 (5hp motor.) running from > 1ph 240V. I found the drive cheap so I simply oversized it vs building an > external rectifier/cap. > > HAH! I can top that! I have an 11 KW Tosvert VFD on MY Sheldon R

Re: [Emc-users] Resetting rotary movement count

On 01/05/2016 03:33 AM, Gene Heskett wrote: > > I've not seen a rotary that could not turn forever. Can you supply a URL > to such a device? > > Yes, stacked rotary axes. We use one at work. they have a little Yuasa rotary table bolted to a HUGE Yuasa rotary table. The small table has a contro

Re: [Emc-users] Rewiring the BP

On 01/01/2016 11:37 AM, andy pugh wrote: > On 1 January 2016 at 17:29, Bertho Stultiens wrote: >> The reason for /not/ connecting the ground on a secondary winding is to >> prevent a capacitively coupled ground path. > Another reason is that if you connect either secondary winding end to > ground

Re: [Emc-users] Rewiring the BP

On 01/01/2016 06:02 AM, John Thornton wrote: > Hi Jon, > > So tie say the 48v side to ground to create the neutral? I > attached the drawing of what I have so far on the VFD side. > With power off, use an Ohmmeter to verify the secondary is isolated from the frame. If so, tie either end to groun

Re: [Emc-users] Rewiring the BP

On 12/31/2015 03:24 PM, John Thornton wrote: > I went and checked the control transformer and one side is 48v to ground > and the other side is 79v to ground. I guess I was confused by that. > Do you have a ground connected to that winding? If not, then the capacitance of that winding to other wi

Re: [Emc-users] Waterjet at TX/RX Labs

On 12/30/2015 02:08 PM, Jason Burton wrote: > That's what the bricks do in the clip. It takes surprisingly little > clamping to make good parts on waterjet. > Yes, but I could see the workpiece in the video jumping when the pierce went through. So, the bricks were not in the right place, I guess.

Re: [Emc-users] Rookie Question - Direct wire or connectors

On 12/30/2015 09:58 AM, John Alexander Stewart wrote: > On Sat, Dec 26, 2015 at 6:22 PM, Gene Heskett wrote: > >> On Saturday 26 December 2015 17:39:11 John Thornton wrote: >> >>> Gene got a link to one? >>> >>> JT >> < >> http://www.ebay.com/itm/10pcs-Aviation-Plug-Male-Female-Wire-Panel-Metal-Co

Re: [Emc-users] Waterjet at TX/RX Labs

On 12/27/2015 10:42 PM, Chris Kelley wrote: > There's now one more LinuxCNC waterjet in the world. Retrofit of a c. 2000 > Flow Waterjet, 4' x 4' cutting area and a 40K psi intensifier. > > This video was from yesterday (Dec. 26): > https://youtu.be/CEA0XdIvBQY > > Tonight we got the abrasive hoppe

Re: [Emc-users] BIOSTAR J1900MH2 Ver. 6.x

On 12/22/2015 12:20 PM, Peter C. Wallace wrote: > > Its true 4 core (and has no hyperthreading option) > > Hmm, not sure LinuxCNC can really use more than 2 cores, most of the time. Jon -- ___

Re: [Emc-users] BIOSTAR J1900MH2 Ver. 6.x

On 12/22/2015 11:14 AM, Jim Craig wrote: > Does anyone have any experience with this motherboard? I am thinking > about using it on my upcoming builds. I like it since it is a J1900 and > a Micro ATX which gives additional PCI express slots. > > http://www.newegg.com/Product/Product.aspx?Item=N82E1

Re: [Emc-users] Grounding Issues

On 12/20/2015 05:06 PM, John Thornton wrote: > Well it works fine till I plug in the VFD so I guess I'll have to rewire > the machine and my shop again :( > > Well, that is now very important information! Just plugging in the VFD, without having it start the spindle motor causes the problem? The

Re: [Emc-users] Pico systems web pages off-line this morning

On 12/16/2015 08:21 AM, Gene Heskett wrote: Yup, we had a couple hour power outage. Seems that everything is back up and stable. Thanks, Jon -- ___ Emc-users mailing list Emc

Re: [Emc-users] Soft starting my mills spindle supply

On 12/12/2015 08:32 PM, Gene Heskett wrote: > > As I'd druther not have to listen to those contactors humm & buzz when > powered by 120 AC, my thoughts are to use that transformer as a step > down, feeding the nominally (I haven't measured it yet) into a bridge, > feeding the contactor coils with s

Re: [Emc-users] Hardinge Conquest 42 Conversion

On 12/07/2015 11:02 PM, Jeremy Jones wrote: > Thanks everyone. Sarah, thanks for that great link. Not sure how I haven't > come across that yet. I'm gonna look into everything. Thinking I might just > got this route off the bat. Looking it might be a minimum of $1500 to fix > the controls. I think

Re: [Emc-users] Linuxcnc on Fujitsu Siemens FUTRO S400

On 12/07/2015 08:22 AM, Paul Lacatus (Personal) wrote: > Hi everybody, > > I am using for some time Linux CNC on a small proxxon MF70 > for small PCB or small faceplate . Right now the computer > is a tower PC with a celeron 900MHz that is bigger than > the MF70. I found a thin client computer

Re: [Emc-users] Poor mans soft turnon

On 12/07/2015 06:11 AM, Gene Heskett wrote: > I definitely need to restore some means of bleeding them > off when powered down. IIRC I saw some mini-candelabra > sockets at Wallies a while back so I need to get 2 of them > and put a lamp across each half of the supply. Its 2 in > series and 2 o

Re: [Emc-users] Poor mans soft turnon

On 12/06/2015 10:42 PM, Gene Heskett wrote: > On Sunday 06 December 2015 22:57:52 Rafael wrote: > >> On 12/06/2015 07:25 PM, Gene Heskett wrote: >>> Greetings all; >>> >>> Before tv's lost their crt's, there was a component in the power >>> inlet circuit that had a very high negative temp coefficie

Re: [Emc-users] debris collection

On 12/01/2015 05:34 AM, andy pugh wrote: > On 1 December 2015 at 06:46, Gene Heskett wrote: >> I'd have some concern about the heat rise of its motor if it was that >> confined. > The motor is probably cooled by the airflow. > All Shop Vacs built for wet/dry use have a separate airflow through th

Re: [Emc-users] On skipping over a broken tool embedded in workpiece

On 11/25/2015 09:36 AM, Gene Heskett wrote: > Now if someone could suggest a feed rate for 2500 revs on > a 2 flute thats not digging near as deep on a per pass basis? Any way you can turn up your RPM? These tiny cutters are made to go 25K to 50K RPM. They actually cut wood WAY better at highe

Re: [Emc-users] On skipping over a broken tool embedded in workpiece

On 11/25/2015 06:21 AM, Gene Heskett wrote: > But in reducing the depth of cut from about 77 thou, to 21 thou in > deference to the fragility of a 1/32 end mill, I am probably not getting > the correct chip load, so at 2500 revs for a 2 flute 0.03125 diameter > solid carbide end mill, what would be

Re: [Emc-users] A thank you, and an unrelated question thats been asked lots of times.

On 11/24/2015 05:25 AM, Gene Heskett wrote: > On Tuesday 24 November 2015 00:21:15 Jon Elson wrote: > >> On 11/23/2015 10:23 PM, Gene Heskett wrote: >>> But can someone take a look at the screenshot attached, and tell me >>> how to get rid of the nuisance erro

Re: [Emc-users] A thank you, and an unrelated question thats been asked lots of times.

On 11/23/2015 10:23 PM, Gene Heskett wrote: > But can someone take a look at the screenshot attached, and tell me how > to get rid of the nuisance error its showing? Preferably for good? > > Put an M02 at the end of your program? Jon --

Re: [Emc-users] Configuring New PCI Parport

On 11/20/2015 06:56 PM, jeshua wrote: >> > So I have installed the card, see that it has the parport_pc kernel > registered, but cannot get it to go to epp. > > 08:00.0 Parallel controller: Oxford Semiconductor Ltd OX9162 Mode 0 (parallel > port) (prog-if 03 [IEEE1284]) > Subsystem: Siig In

Re: [Emc-users] Configuring New PCI Parport

On 11/20/2015 11:19 AM, Sarah Armstrong wrote: > i have quite a collection of parallel port cards that don't work with > Linuxcnc both pci & pcie > the only ones so far i have found to work are the startech ( after patching > the epp ) & one's with Oxford semi chipsets > are the only ones so far i

Re: [Emc-users] Configuring New PCI Parport

On 11/19/2015 11:24 PM, Gene Heskett wrote: > Did I see the number 9815 in the chipset someplace back in > the beginning of this thread? IIRC thats a netmos number, > and is known to not work at this location from several > years ago. I then bought a StarTech card, which did work. > But that wh

Re: [Emc-users] Configuring New PCI Parport

On 11/19/2015 10:20 PM, Jeshua Lacock wrote: > On Nov 19, 2015, at 2:05 PM, Todd Zuercher wrote: > >> Are you sure that is actually the right listing for your pci card? > > Hi Todd, > > Yes, I am sure, if the card isn’t in the machine the listing isn’t there. > >> The listing for my card (albei

Re: [Emc-users] Hardinge Conquest 42 Conversion

On 11/12/2015 05:47 PM, Jeremy Jones wrote: > Thinking about picking up a Conquest 42. The machine is supposedly in good > shape but the Fanuc OT control might be shot and the motherboard would need > to replaced. Will try to resurrect but I'm thinking linuxcnc anyway since I > did a Bridgport rece

Re: [Emc-users] could Linux cnc control of unconventional ... hydraulic

On 11/09/2015 02:34 AM, Andrew wrote: > 2015-11-09 8:49 GMT+02:00 Eric Keller : > >> there were hydraulic milling machines sold based on Moog hydraulics >> and Bridgeport iron. I assume those two companies could screw things >> up, but the world has moved on. To move a long distance takes a lot >

Re: [Emc-users] could Linux cnc control of unconventional ... hydraulic

On 11/08/2015 09:54 PM, TJoseph Powderly wrote: > moog or pegasus. brands, those are the big names. > they were used to move really heavy cast iron slides, often dovetail. > > messy ( plan on leaks and kitty litter ) > the hydraulic supply tops up the volume from a reservoir that you keep full > th

Re: [Emc-users] Desktops and OS's

On 11/04/2015 07:21 AM, Pete Matos wrote: > Man I so need to do that in my shop. This sneakernet stuff gets old LOL... > Peace > > I didn't use any of this sharing stuff, but I have used ftp (now sftp) since 1998 with Ethernet. It may take just a couple more keystrokes (password, directory, etc.

Re: [Emc-users] Desktops and OS's

On 11/03/2015 12:19 PM, Dave Cole wrote: > Hi Jon, > > I didn't write that. I wrote a reply to that. > > Sorry, I tried to unwind the attribution, but must have missed a level. Jon -- ___

Re: [Emc-users] Desktops and OS's

On Tue, Nov 3, 2015 at 11:28 AM, Dave Cole wrote: >>> US Postal System shipping labels (via PayPal, via Pitney Bowes, using >>> their Java craplet) is fraught with peril. Dragons be here! But who >>> knows? It might work in Debian... for a week or two. Hmm, strange, I've had no trouble, and I

Re: [Emc-users] Carousel Component

On 10/31/2015 10:15 PM, Gene Heskett wrote: > > I have 3, 8 wire motors, I presume intended for direct 24 volt operation > since the coil ohms is 145, and the current/phase matched that at 166 > mills per coil. Ugh, these motors will have HORRIBLE performance. Maybe they could work for a tool car

Re: [Emc-users] tool changers

On 10/30/2015 07:56 AM, andy pugh wrote: > On 30 October 2015 at 03:09, Jon Elson wrote: > >> MT3 is a "self holding taper". So, if a clean, burr-free >> holder is driven into a clean, burr-free socket, it should >> resist normal machining forces with NO drawbar

Re: [Emc-users] tool changers

On 10/29/2015 07:09 PM, rayj wrote: > Thanks for the reply. > > That's what I was thinking, but some MT3 adapters are just rammed in > place or tapped lightly with a hammer and function adequately. MT3 is a "self holding taper". So, if a clean, burr-free holder is driven into a clean, burr-free s

Re: [Emc-users] machine motion

On 10/29/2015 02:41 PM, Stuart Stevenson wrote: > Ok, > > new information > > new ram installed > new ppmc boards > no change in machine motion on the Y axis - the other axes run fine (they > might have been fine before and it may have been my misunderstanding). > once y motion has been started the

Re: [Emc-users] machine motion

On 10/29/2015 01:53 PM, Stuart Stevenson wrote: > Shannon at MPM will change the ram on the machine. He said it has been > acting SLOW and strange lately. When I mentioned Dave's comment Shannon > agreed instantly that could be the problem. > Hmmm, has the computer been rebooted? It could just hav

Re: [Emc-users] machine motion

On 10/29/2015 12:48 PM, Stuart Stevenson wrote: > Gentlemen, >re: the cinci at MPM > When they push the arrow key to move an axis the machine keeps moving. A > couple weeks ago the X axis was the only one doing this but now other axes > demonstrate this feature. > They disconnect the keyboard,

Re: [Emc-users] Minimum hardware?

On 10/21/2015 08:20 PM, rayj wrote: > What's the minimum hardware that the current version will run on? I > looked at the wiki and the .org pages and the information I could find > is for Ubuntu 8 requirements. > > I'm just playing and exploring, I'm not actually running a machine, so > speed and

Re: [Emc-users] Cheap Chinese Spindles?

On 19 October 2015 at 16:15, Todd Zuercher wrote: >> Anyone have any opinion on a spindle like this? >> http://www.ebay.com/itm/7-5KW-18000rpm-380V-15-5A-Square-Spindle-Motor-ER32-Air-cooled-CNC-Woodworking-/201181719622?_trksid=p2141725.m3641.l6368 >> for 1/3 the price of the Perske it is hard n

Re: [Emc-users] using tool table offsets with G41 or 42

On 10/17/2015 09:47 PM, Gene Heskett wrote: > So I went to Shop & Save & got the only re-usable mouse > traps they had, the other choices being sticky pads or > DeCon. Made out of thin galvanized steel these days, a > very very poor design. I've been bending parts around to > make them more sen

Re: [Emc-users] using tool table offsets with G41 or 42

On 10/16/2015 11:21 PM, Gene Heskett wrote: > Greetings; > > 1: I am trying to get past the infamous, permanently programmed into LCNC > error of: > > "length of cutter compensation entry move is less than the tools radius" > > The tool diameter in the tool_table is 0.030 just for test. and the to

Re: [Emc-users] Here's Gene's new pocket O'scope

On 10/06/2015 01:16 AM, Philipp Burch wrote: > This is sometimes called the "equivalent-time sampling": Yes, that's how sampling scopes work. But, I SERIOUSLY doubt that $49 contraption does that! Jon -- ___

Re: [Emc-users] Here's Gene's new pocket O'scope

On 10/05/2015 10:16 AM, Mark Wendt wrote: > > Well, it does say the "analogue bandwidth" is 2 MHz. It could be > using sub-sampling to acheive that bandwidth. > > Even if the analog BW is 2 MHz, if you feed in a 2 MHz signal with a 2.5 MSa/sec sampling rate, you are bound to get a seriously alias

Re: [Emc-users] Here's Gene's new pocket O'scope

On 10/05/2015 04:28 AM, Mark Wendt wrote: > http://www.banggood.com/DSO112-2MHz-Touch-Screen-TFT-Digital-Mini-Handheld-Oscilloscope-p-977991.html > > 2 MHz only, but that covers a lot of territory. Battery powered. > > Bogus specs! The sample rate is 2.5 Msa/sec. So, MAYBE you can display a 1.2

Re: [Emc-users] Amazon playing tricks?

On 10/03/2015 11:00 AM, Gene Heskett wrote: > So I go to fleabay, and their search engine sends me 4 damned pages of 12 > volt supplies for a search term of "24 volt switching power supply". > All at 2-5x the amazon prices. For small power supplies, MP Jones used to be the best. They are still qu

Re: [Emc-users] Very cheap stepper drives

On 09/30/2015 10:55 AM, Roland Jollivet wrote: > > And does anyone know why Gecko has shied away from 3ph drives? It seems a > step away from 2 phases ;-) > > Yes, Mariss mentioned this years ago. In a simple drive with minimal configuration setup, the only reasonable way to go is a six step dri

Re: [Emc-users] Very cheap stepper drives

> On Wed, Sep 30, 2015 at 10:58 AM, Dave Cole wrote: > > >> Hey, did I see that you are no longer a Washingtonian? Does that mean >> that you now live in the land of the left hand (MI) ? ;-) >> My daughter lives in Chevy Chase and I continually hear about the cost >> of this and that. For her

Re: [Emc-users] Very cheap stepper drives

On 09/29/2015 09:47 PM, Dave Cole wrote: >> > If it makes you feel better Walmart is using their website to sell other > peoples products now. OK, so that is just like Amazon, then. That is better! Jon -- ___

Re: [Emc-users] Very cheap stepper drives

On 09/29/2015 07:04 PM, andy pugh wrote: > On 30 September 2015 at 00:33, Dave Cole wrote: >> I purchased some very cheap stepper drives based on the TB6660 Toshiba >> chip a little while ago for a very much "budget driven" controller build >> using LinuxCNC for a Sherline Mill and Lathe. > Talkin

Re: [Emc-users] Yaskawa or not

On 09/29/2015 10:55 AM, Marius Liebenberg wrote: > Hi All > I have been asked to upgrade a machine that has a very old > control system still running on DOS. It is fitted with > Yaskawa SGDB-03VDY1 drives. I cannot seem to find > reference to that extract number. There are two 2.9Kw > motors an

Re: [Emc-users] Yaskawa or not

On 09/29/2015 11:49 AM, Marius Liebenberg wrote: > The Servopack number is SGDB-03VDY1 like I mentioned below > The motors are AC servos - USAGED-30V22 and USAGED-05V22K > > Oh, the USA motors may well have industry-standard commutation signals, not the proprietary form I mentioned before. Jon

Re: [Emc-users] Porting LinuxCNC(EMC) to Windows was CAD/CAM for LinuxCNC

On 09/20/2015 12:45 PM, Dave Cole wrote: > John, > > Using the BBB is bleeding edge. But you should know that if you are > frequenting the Machinekit email list. > > Actually, it is not so bleeding edge anymore. There are apparently thousands of people using it, mostly on 3D printers, but also

Re: [Emc-users] CAD/CAM for LinuxCNC

On 09/19/2015 11:17 AM, Dave Cole wrote: > On 9/19/2015 11:56 AM, John Dammeyer wrote: >> But then not everyone runs closed loop servos with LinuxCNC. Or perhaps >> they do? > Just a guess, but I would say that less than 25% of LinuxCNC systems run > Servos via analog boards. > > Remember, you can

Re: [Emc-users] Learning LinuxCNC Youtube Channel

On 09/18/2015 08:26 AM, andy pugh wrote: > On 18 September 2015 at 14:23, Erik Christiansen > wrote: > >> Looking forward to the one on using the probe with LinuxCNC. > Have you seen the probe tab that "verser" created? > http://www.linuxcnc.org/media/kunena/attachments/20614/ProbeIssue.png > > Wo

Re: [Emc-users] near module has me confused

On 09/16/2015 08:32 PM, Gene Heskett wrote: > > I also told the missus that I'll break this belt, and the spare I bought > with it, but then I strip it for the goodies and buy a real lathe. > Throw money at it IOW. > > This BS has not just begun to get old, its turning grey. > > The toy mill needs

Re: [Emc-users] 2.7.0 Docs

On 09/13/2015 01:38 PM, Gene Heskett wrote: > On Sunday 13 September 2015 12:08:29 Jon Elson wrote: > >> On 09/13/2015 08:59 AM, John Thornton wrote: >>> Thanks, in the standard PDF viewer that comes with Debian Wheezy >>> they show up fine. All the images used are .p

Re: [Emc-users] A curious correlation

On 09/13/2015 09:44 AM, andy pugh wrote: > Why are so many LinuxCNC users called John Doe? I suspect that they > are registering pseudonymously. > Hmmm? Where do you see these John Does? I haven't seen any of them in the several LinuxCNC-related places I haunt. Jon

Re: [Emc-users] 2.7.0 Docs

On 09/13/2015 08:59 AM, John Thornton wrote: > Thanks, in the standard PDF viewer that comes with Debian Wheezy they > show up fine. All the images used are .png type. I don't have kpdf and > it does not show up in the package manager so I can't test it. > > I'm using "document viewer" in Ubuntu 12

Re: [Emc-users] Knurling with a threading tool using spindle coordinated motion (G33) on EMCOTurn 120P CNC lathe

On 09/12/2015 07:38 AM, sam sokolik wrote: > Great work! I wondered how well that would work. (files that video > away under 'linuxcnc is awesome') > > I did this a LONG time ago, on a manual lathe. I set it for the coarsest thread it could do, and then hand-cranked the leadscrew (which drove

Re: [Emc-users] G33 and motion-spindle-speed-in, motion-spindle-revs (2.7.0-pre7)

On 09/10/2015 10:00 AM, Tom Easterday wrote: > Sorry, that was the plot when using G1 (smooth). Here is the plot using G33, > notice all the noise on the joint velocity command: > http://bgp.nu/~tom/pub/noise-velocity-G33.png > -Tom > > Why is the command jumping all over the place? It appears

Re: [Emc-users] Winter Machining Project

On 09/10/2015 12:36 AM, Gregg Eshelman wrote: > On 9/9/2015 10:57 AM, Jon Elson wrote: > >> I have a rough design already made up, uses wheels that are >> advanced when the balls hit levers. Different length pins >> on the wheels allow the levers to drop the ball to tw

Re: [Emc-users] Winter Machining Project

On 09/09/2015 01:45 PM, Marcus Bowman wrote: > On 9 Sep 2015, at 17:57, Jon Elson wrote: > >> On 09/09/2015 04:17 AM, andy pugh wrote: >>> On 9 September 2015 at 02:36, Jon Elson wrote: >>>> I've wanted to make a clock that worked by having one ball >>&

Re: [Emc-users] Winter Machining Project

On 09/09/2015 04:17 AM, andy pugh wrote: > On 9 September 2015 at 02:36, Jon Elson wrote: >> I've wanted to make a clock that worked by having one ball >> lifted up a track per minute, and the ball rolling down the >> track flips levers to advance the clock and carry t

Re: [Emc-users] Universal Stepper Driver 4th Axis Config

On 09/08/2015 08:59 PM, Jeshua Lacock wrote: > So the enable goes where again? Note for this 4th axis it is just a stepper I > am trying to drive not a servo like my other axes… > > The driver has: > > 5V Enable Dir StepGnd Power > > I have dir, step gnd, power and

Re: [Emc-users] Universal Stepper Driver 4th Axis Config

On 09/08/2015 07:30 PM, Jeshua Lacock wrote: > Greetings, > > I am trying to add a 4th axis to my USC from Pico Systems. My set of config > files is at: > > > > I defined the new axis as W and set it up the way the other axes are setup as > far as I can t

Re: [Emc-users] Winter Machining Project

On 09/08/2015 11:47 AM, Kirk Wallace wrote: > With Fall starting soon, it might be good to start planning a project to > get one through the idle times during Winter. Here is one idea for a > project: > > http://www.my-time-machines.net/Astro_intro7.jpg > http://www.my-time-machines.net/my_current_

Re: [Emc-users] Supported Servo Motors

On 09/04/2015 12:16 PM, John Kasunich wrote: > > > You need pull-ups on at least the high voltage side. OK, NOW it makes sense! Can't be terribly fast if it needs resistive pull-up though. Thanks! Jon -- __

Re: [Emc-users] Supported Servo Motors

On 09/04/2015 03:58 AM, andy pugh wrote: > On 4 September 2015 at 02:16, Jon Elson wrote: >> Apparently, this device can't do bidirectional translation. >> It can do 22 channels of conversion all going to a lower >> voltage, or all going to a higher voltage. But, when w

Re: [Emc-users] Supported Servo Motors

On 09/03/2015 10:58 AM, Gene Heskett wrote: > On Thursday 03 September 2015 10:49:23 Jon Elson wrote: > >> On 09/03/2015 06:17 AM, andy pugh wrote: >>> I made a small run of DB25 to RaspberryPi breakouts that were >>> bidirectional using the almost-magic GTL2000 >

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