Re: [Emc-users] spindle motor broke down, any(complete spindle) replacement suggestions?
This the cnc mill with washing machine motors: http://hackedgadgets.com/2008/12/16/cnc-machine-built-using-washing-machine-motors/ But these are used as steppers, not for the spindle. Dirk -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] spindle motor broke down, any( complete spindle) replacement suggestions?
On Sun, 12 Apr 2009 18:39:25 -0400, you wrote: KBIC range are available in the UK, never many on ebay. They aren't expensive new from http://www.stmuk.co.uk/ That link doesn't lead me to anything like the speed controller that came in my micromill, said to be a KBIC. It seems to be fawncy motors and gear trains ANAICT. Look on the left of the page, there's an email address, and a phone number, you could always ring them :) Just decide what part you want/need from KB first http://www.kbelectronics.com then ring STM and ask for price. If they are no longer doing them, try one of the other UK stockist's, you can get that info from KB's site. Is that the site that sells these sorts of dc controllers? You'll need to look at the different controller specs at KB to find one suitable for you. Chassis mount DC controllers are here. http://www.kbelectronics.com/catalog_chassis.htm Steve Blackmore -- -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] spindle motor broke down, any(complet e spindle) replacement suggestions?
At 10:29 AM 4/12/2009, you wrote: I have a nice 400 Hz washing machine motor that does 17,000 rpm that I pulled out of a dumpster, that I have been saving to pair up with a nice high speed spindle. I have test run it on a Danfoss vfd and it was reasonably well balanced at top speed. Like this: Snippage Horry Clap! 17,000 rpm washing machine motor? That's one hell of a spin cycle! ;-) Tom Mark -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [OT] AC Solid State Relay
Hello Kirk, small power applications such as dimmers must switch on the Triac at any time of the AC cycle. This produced a high current surge if it is near the peak of the sine and thus a lot of EM noise on the cables. High power appliances such as furnaces etc. turn on at the zero crossing monet thus producing less noise; they use packet control instead for power regulation. Energy suppliers mostly insist of zero crossing relays for high power devices above about 2 kW. This is why there are two different sorts of SSR. Best regards Peter Blodow At 03:32 13.04.2009, you wrote: For this relay: http://document.sharpsma.com/files/s108t01_e.pdf what does Non-zero crossing functionary mean? -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Users Locations
Hello Ian, I wonder what treasures you are sitting upon on your piece of property in Suffolk. As for my part, I'm very grateful to Alex and others to have made this view of the world transparent to all users. If someone wants to spot me it costs him only a line in Telefonbuch.de and Maps and Route, anyway, and he gets the address and even a satellite photo of my house and garden. Can't get out of it today. More: I joined this mail group beause I want to profit from the knowledge of others and to contribute when I can help, so we all can learn mutually from each other. I would be glad if there were someone near my property in Bavaria so we could excange directly and visit each others' places and workshops (and exchange rare or surplus parts, as has happened before). I can't see the use of anonymity here. Best regards Peter Blodow At 23:32 12.04.2009, you wrote: Steve Stallings wrote: OK, it is working well, now could we have the sign in on the main page give a clue to uninformed visitors as to why they might want to register and sign in? More particularly - why would anyone want to give out such detailed information on an unsecure registration page with no guarantees as to how the information might be used in the future? I used to be shown on the old map from way back but I see that I am not on the new one - however, I never will be if I am required to register and broadcast my exact property location to the world. Ian W. Wright Sheffield UK -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Users Locations
I have to agree with Aaron, a job well done! I think we are the lucky guys. User density in England and the Netherlands is higher (per square mile) than in he US :-) There are 408 registered users on linuxcnc.org but still less than 60 users on the map so there is still some work to do - for the users of linuxcnc that is. Cheers, Rob aaron moore wrote: Hi EMC Guys Really like the map, many thanks to to all those responsible. However I do feel a bit out on a limb down in Cornwall UK,but if anyone comes for a seaside holiday do drop in ; Cheers Aaron -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] probe_parport; what does it do?
Trying to make my EPP communication work today, works OK on builtin 0x378 but not on an EPP/ECP PCI card. That PCI card is OK with hal_parport (using SPP only at 0xBC00) so I started educating myself. Looking at probe_parport and trying to find out what it does, I put in some rtapi_print( at various places. The central function parport_pc_pnp_probe() seems not to ever execute. Maybe rtapi_print does not work in there so I put a while(1); in the beginning of parport_pc_pnp_probe but that did not have any effect either! I see my other printouts in dmesg so I am sure I have replaced probe_parport.ko and have it executed. The original thought was to make probe_parport tell me what ports it has found. Grateful for any ideas or pointers! Environment is 2.3.0beta2 on Hardy. -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] probe_parport; what does it do?
On Mon, Apr 13, 2009 at 03:31:18PM +0200, Lars Andersson wrote: Trying to make my EPP communication work today, works OK on builtin 0x378 but not on an EPP/ECP PCI card. If your card is NETMOS based, they are known not to work in EPP mode. http://thread.gmane.org/gmane.linux.distributions.emc.user/11010/focus=11233 -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] spindle motor broke down, any(complet e spindle) replacement suggestions?
Mark Wendt (Contractor mark.we...@... writes: Horry Clap! 17,000 rpm washing machine motor? That's one hell of a spin cycle! Mark I pulled mine out of dumpster, so at first I didn't even know what it was from, but at some point I spotted the same motor on ebay being sold as a replacement washing machine motor - so... Yup. If you look closely at the pictures, the output shaft has a very small diameter multi-groove pulley on it, similar to the fan belt drive on your Mercedes. Obviously the corresponding pulley on the washing machine basket must be huge! Interestingly, this points to the conclusion that most modern washing machines have to have some sort of 220V 3 phase variable frequency motor drive somewhere on the circuit board, complete with encoder speed feedback and PID loop. Hm Tom -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] spindle motor broke down, any(complet e spindle) replacement suggestions?
Hello Tom, I also cannibalized such a washing machine motor from a junk machine, with multi vee belt pulley etc. as described. It has brushes and separately accessible field coil terminals. This brings me to the conclusion that the motor is simply run with different field voltages to yield slow and fast movement like in the good, old DC times - no three phase motor, no variable frequency devices, but usable... :-( Best regards Peter Blodow At 18:51 13.04.2009, you wrote: Mark Wendt (Contractor mark.we...@... writes: Horry Clap! 17,000 rpm washing machine motor? That's one hell of a spin cycle! Mark I pulled mine out of dumpster, so at first I didn't even know what it was from, but at some point I spotted the same motor on ebay being sold as a replacement washing machine motor - so... Yup. If you look closely at the pictures, the output shaft has a very small diameter multi-groove pulley on it, similar to the fan belt drive on your Mercedes. Obviously the corresponding pulley on the washing machine basket must be huge! Interestingly, this points to the conclusion that most modern washing machines have to have some sort of 220V 3 phase variable frequency motor drive somewhere on the circuit board, complete with encoder speed feedback and PID loop. Hm Tom -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] What's coming in manufacturing
I am am almost 75 years old and some kind of excited about this new industrial revolution that is creeping up on us all. My grandson is programing cnc for several different companies running cnc at home building products and to a lesser degree subcontracting. These little home shops don't have to pay employee healthcare nor pay corporate taxes. They can likely pay the lower capital gains taxes on what their robots, cnc mills and Fab machines build. When I think that I can download and install Ubuntu and EMC 2 buy a driver box from a shop that may have built it at home and even go so far as to build my own mill from parts that may have been built in a home workshop it's exciting. Some guy in his back yard may well cast the parts in his back yard for me out of scrap metals. WOW This not a little thing it can be huge. It may well change government or it's tax methods. It may turn out that we will do away with income tax and have to tax these products when sold in the form of sales tax. These same people will not have to drive 20 miles to work everyday and may not wear out a car every ten years making that trip. Mass transit may be an idea that has come and is now going. I have been dreaming about this stuff since back in the late 1960's when I first began to use NC and then CNC. I think the Chinese have done us a huge favor by taking manufacturing away to free up the young, smart as can be young entrepreneur that are beginning this new economy. A lot of this, I think is inspired by the writing of free software like linux. Then from there moving on to free programs like Cinelerra and emc 2. I really believe free Linux has reached a kind of critical mass that is now allowing it to move into programs that can do physical work and manufacturing. I am presently repairing microscopes but will soon be making medical parts for hospital beds, Xray machines etc. These will go freely all over the world where they are sorely needed and a big part of this will be, because of EMC 2. I could not make enough of these without cnc. I will need to make some parts to sell as well. I can't run a backyard shop without some income from someplace so I will make and sell some parts for this purpose. I have also decided that some of this money needs to go to the writing of software like Emc 2 so I plan to donate some of what I make to help develop. It won't be much money but it will help. I have never done this before because I only used free software in playing with my computer but now this same software is doing my work for me so it only seems fair to return something. Wouldn't it be something if free software changed the economy of the whole world?? I find this really exciting stuff and it seems it may go as far as you can imagine. Doug -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [OT] AC Solid State Relay
Kirk Wallace wrote: On Sun, 2009-04-12 at 22:04 -0400, John Kasunich wrote: ... snip Regardless of the type of turn-on, once the Triac is on, it won't turn off until the current through it goes to zero - even if the LED is off. That's why SSRs only work for AC - in a DC circuit the current won't go to zero. Hope this helps, John Kasunich Thanks John. Did you mean That's why _SCR's_ only work for AC? Oh, boy! I sure did mean SCR and Triac-type SSRs, the ones marked for AC output. I was looking at two devices, both datasheets looked the same to me except: S108T02 has Zero crossing functionary (VOX : MAX. 35V) S108T01 has Non-zero crossing functionary I just want to turn a 24 VAC transformer on and off for my weathercam antenna rotor, so I suspect either one will work. Actually, zero-crossing SCRs are not real good for this. With little transformers with high winding resistance, such as in this case, either will work fine. With bigger power transformers, turning on at the zero crossing causes the transformer to be saturated every time it turns on, with a big HUMMMmm. A random-turn-on SSR will only do that when it happens to be turned on near the zero crossing. Best is a 90 degree turn-on, where it turns on at the voltage peak. I haven't seen that they sell such a device, but a PLC could do it for you. Jon -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] probe_parport; what does it do?
Thanks Chris, exactly on target, this one IS based on MOSCHIP MCS9805CV. Have to go find something else. In reference http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?PPMC_Board_Set I found these known good chips SMC37C665 (This is Multi I/O for MOBO IIRC) SMC37C666 SMC37C669 W83997TF SIIG PCI board Are there any other known good chips that are common out there? Not so easy to find out in advance what chip might be on a particular board. // Lars -Original Message- From: Chris Radek [mailto:ch...@timeguy.com] Sent: den 13 april 2009 16:53 To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] probe_parport; what does it do? On Mon, Apr 13, 2009 at 03:31:18PM +0200, Lars Andersson wrote: Trying to make my EPP communication work today, works OK on builtin 0x378 but not on an EPP/ECP PCI card. If your card is NETMOS based, they are known not to work in EPP mode. http://thread.gmane.org/gmane.linux.distributions.emc.user/11010/focus=11233 -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Question about encoders
cmg...@sover.net wrote: Kirk. Thank you. There is a lot here to absorb. The ways and means of programing are all new and a foreign language. But..it's coming. It looks like I need a few of those chips and sockets. The online supply houses are pretty good. Does adding statments relative to encoders such as loadrt encoder num_chan=2etc. (taken from the etch file) bring along any response on the AXIS display screen? Or is there more to be done? No, there is one more step - you have to connect the hal component to a thread so it gets executed. The command should be something like : addf encoder.0 servo-thread Without doing this, you would see the encoder.0.xxx hal pins in the show hal signals window, but they wouldn't change. After the addf, they would be updated with respect to the encoder inputs. BUT, you don't have any inputs. You would need to connect your parallel port input pins to the encoder input, and the enocder position output to the motion system. You would do well to look at some of the sample configs files which control servos directly through the parallel port to see how this is done. Jon -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [OT] AC Solid State Relay
Also when driving highly inductive loads you want to start triggering at voltage maximum and then inject a shower of pulses into the gate for maybe 45 degrees. Otherwise the SCR/Triac main current might not have risen enough at the end of the first trigger pulse to sustain conduction. If we try with a 45 deg. long trigger pulse we might overload the gate so a burst of short pulses is best. -Original Message- From: Jon Elson [mailto:el...@pico-systems.com] Sent: den 13 april 2009 19:15 To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] [OT] AC Solid State Relay Kirk Wallace wrote: On Sun, 2009-04-12 at 22:04 -0400, John Kasunich wrote: ... snip Regardless of the type of turn-on, once the Triac is on, it won't turn off until the current through it goes to zero - even if the LED is off. That's why SSRs only work for AC - in a DC circuit the current won't go to zero. Hope this helps, John Kasunich Thanks John. Did you mean That's why _SCR's_ only work for AC? Oh, boy! I sure did mean SCR and Triac-type SSRs, the ones marked for AC output. I was looking at two devices, both datasheets looked the same to me except: S108T02 has Zero crossing functionary (VOX : MAX. 35V) S108T01 has Non-zero crossing functionary I just want to turn a 24 VAC transformer on and off for my weathercam antenna rotor, so I suspect either one will work. Actually, zero-crossing SCRs are not real good for this. With little transformers with high winding resistance, such as in this case, either will work fine. With bigger power transformers, turning on at the zero crossing causes the transformer to be saturated every time it turns on, with a big HUMMMmm. A random-turn-on SSR will only do that when it happens to be turned on near the zero crossing. Best is a 90 degree turn-on, where it turns on at the voltage peak. I haven't seen that they sell such a device, but a PLC could do it for you. Jon -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] spindle motor broke down, any(complet e spindle) replacement suggestions?
Peter blodow p.blo...@... writes: Hello Tom, I also cannibalized such a washing machine motor from a junk machine, with multi vee belt pulley etc. as described. It has brushes and separately accessible field coil terminals. This brings me to the conclusion that the motor is simply run with different field voltages to yield slow and fast movement like in the good, old DC times - no three phase motor, no variable frequency devices, but usable... Best regards Peter Blodow Hi Peter, Yes, I am aware that there are several drive types for these motors. Mine is clearly 3 phase from the info on the data plate; 3-phase induction motor for automatic washer / 190V 5A 820W - 236Hz - Not to mention that I have tested it on a vfd up to around 24,000 rpm. When dumpster diving, just read the data plate ~ when ebaying ask the seller for the data plate info. regards, Tom -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] What's coming in manufacturing
Doug Pollard dougp...@... writes: BIG snip... Wouldn't it be something if free software changed the economy of the whole world?? I find this really exciting stuff and it seems it may go as far as you can imagine. Doug Hello Doug, What a nice thought. You just brightened my day! Sometimes I feel overwhelmed with the eternal to-do list... so it is nice to be reminded of the quiet revolution. Thanks, Tom -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Question about encoders
On Mon, 2009-04-13 at 10:10 -0400, cmg...@sover.net wrote: Kirk. Thank you. There is a lot here to absorb. The ways and means of programing are all new and a foreign language. But..it's coming. It looks like I need a few of those chips and sockets. The online supply houses are pretty good. There are a lot of variations on the chip I previously linked to. I believe I used this one on my HNC lathe: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detailname=296-6787-5-ND Four receivers chips (each with four channels) are on the board at the top center: http://www.wallacecompany.com/cnc_lathe/HNC/00012-1a.jpg http://www.wallacecompany.com/cnc_lathe/HNC/00013-1a.jpg Does adding statments relative to encoders such as loadrt encoder num_chan=2etc. (taken from the etch file) bring along any response on the AXIS display screen? Or is there more to be done? I believe AXIS looks at your .ini and .hal files for various 'key word = data' entries to figure out how to set up your screen. In my .ini file - ... [TRAJ] AXES = 3 COORDINATES = X Y Z ... My configuration files started as working samples that I modified to suit my machine, so I haven't needed to track down which keywords are needed. So if you can start with sample files that are close, AXIS should present what you need. I suppose the keywords could be tracked down from the AXIS source. Perhaps significant too is your references have shown me the search path on the LinuxCNC home page! Thanks Cal It took me a long time to figure out where a lot of the best information is, such as using man x in a terminal screen, the LXR link in Documentation at linuxcnc.org, using different search words for the same item in the wiki search box, searching the e-mail archives: http://sourceforge.net/mailarchive/forum.php?forum=emc-users I spent a lot of time just clicking on random links just to see what path it would take me. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] spindle motor broke down, any(complet e spindle) replacement suggestions?
On Mon, 2009-04-13 at 19:09 +0200, Peter blodow wrote: Hello Tom, I also cannibalized such a washing machine motor from a junk machine, with multi vee belt pulley etc. as described. It has brushes and separately accessible field coil terminals. This brings me to the conclusion that the motor is simply run with different field voltages to yield slow and fast movement like in the good, old DC times - no three phase motor, no variable frequency devices, but usable... :-( Best regards Peter Blodow The washing machine motors I am used to, are AC induction with, what appear to be, stator windings that are switched to change the number of stator poles. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [OT] AC Solid State Relay
Lars Andersson wrote: Also when driving highly inductive loads you want to start triggering at voltage maximum and then inject a shower of pulses into the gate for maybe 45 degrees. Otherwise the SCR/Triac main current might not have risen enough at the end of the first trigger pulse to sustain conduction. If we try with a 45 deg. long trigger pulse we might overload the gate so a burst of short pulses is best. Just to clarify for the original poster: The device in question is a simple opto-triac. Pulse gating is not required. Just turn on the LED when you want the load to turn on, and turn it off when you want the load to turn off. Regards, John Kasunich -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] What's coming in manufacturing
On Mon, 2009-04-13 at 13:14 -0400, Doug Pollard wrote: I am am almost 75 years old and some kind of excited about this new industrial revolution that is creeping up on us all. ... snip Wouldn't it be something if free software changed the economy of the whole world?? I find this really exciting stuff and it seems it may go as far as you can imagine. Doug I agree that the potential is there, but at this point it is hard to see where this potential will go. The subject of donations to EMC2 has come up before, and it was not received enthusiastically. I think that most of the developers feel that this is a pastime, and bringing money into the mix would diminish the fun. I am very curious about what could be done with EMC2 (and some sort of CAM) if a more commercial approach where pursued. This may be an indication that open source software and free software are are can be very different ideas. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] What's coming in manufacturing
Nice comments Doug. That's the spirit! Rainer On Mon, Apr 13, 2009 at 1:14 PM, Doug Pollard dougp...@verizon.net wrote: I am am almost 75 years old and some kind of excited about this new industrial revolution that is creeping up on us all. My grandson is programing cnc for several different companies running cnc at home building products and to a lesser degree subcontracting. These little home shops don't have to pay employee healthcare nor pay corporate taxes. They can likely pay the lower capital gains taxes on what their robots, cnc mills and Fab machines build. When I think that I can download and install Ubuntu and EMC 2 buy a driver box from a shop that may have built it at home and even go so far as to build my own mill from parts that may have been built in a home workshop it's exciting. Some guy in his back yard may well cast the parts in his back yard for me out of scrap metals. WOW This not a little thing it can be huge. It may well change government or it's tax methods. It may turn out that we will do away with income tax and have to tax these products when sold in the form of sales tax. These same people will not have to drive 20 miles to work everyday and may not wear out a car every ten years making that trip. Mass transit may be an idea that has come and is now going. I have been dreaming about this stuff since back in the late 1960's when I first began to use NC and then CNC. I think the Chinese have done us a huge favor by taking manufacturing away to free up the young, smart as can be young entrepreneur that are beginning this new economy. A lot of this, I think is inspired by the writing of free software like linux. Then from there moving on to free programs like Cinelerra and emc 2. I really believe free Linux has reached a kind of critical mass that is now allowing it to move into programs that can do physical work and manufacturing. I am presently repairing microscopes but will soon be making medical parts for hospital beds, Xray machines etc. These will go freely all over the world where they are sorely needed and a big part of this will be, because of EMC 2. I could not make enough of these without cnc. I will need to make some parts to sell as well. I can't run a backyard shop without some income from someplace so I will make and sell some parts for this purpose. I have also decided that some of this money needs to go to the writing of software like Emc 2 so I plan to donate some of what I make to help develop. It won't be much money but it will help. I have never done this before because I only used free software in playing with my computer but now this same software is doing my work for me so it only seems fair to return something. Wouldn't it be something if free software changed the economy of the whole world?? I find this really exciting stuff and it seems it may go as far as you can imagine. Doug -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- _ Rainer M. Schmidt Complex Consulting LLC b...@complexllc.com VoIP (646)-233-1002 FAX (646)-435-9216 -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [OT] AC Solid State Relay
-Original Message- From: John Kasunich [mailto:jmkasun...@fastmail.fm] Sent: den 13 april 2009 20:04 To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] [OT] AC Solid State Relay Lars Andersson wrote: Also when driving highly inductive loads you want to start triggering at voltage maximum and then inject a shower of pulses into the gate for maybe 45 degrees. Otherwise the SCR/Triac main current might not have risen enough at the end of the first trigger pulse to sustain conduction. If we try with a 45 deg. long trigger pulse we might overload the gate so a burst of short pulses is best. Just to clarify for the original poster: The device in question is a simple opto-triac. Pulse gating is not required. Just turn on the LED when you want the load to turn on, and turn it off when you want the load to turn off. Regards, John Kasunich Sorry, should have read the whole thread. I was carried away by seeing one of my favorite topics. // Lars -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Users Locations
Peter Blodow wrote I wonder what treasures you are sitting upon on your piece of property in Suffolk. Hi Peter, No use looking for me in Suffolk - I'm in Sheffield, South Yorkshire.. the one that's famous for the world's best cutlery, knives and steel !! You would also have to look quite hard to find any real treasures although my home made and designed desktop miller and lathe combination gives me a lot of pleasure in the odd minutes I can take away from my, almost constant, grandparenting duties I don't think I have ever been to Bavaria although I love Austria - I must have a browse around Bavaria on Google Earth.. Best wishes, Ian -- Ian W. Wright Sheffield, South Yorkshire, UK -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] spindle motor broke down
Hi, This reference may be of some interest - http://tinyurl.com/c2upze Ian -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Users Locations
I hacked the map some more, and now the markers should only be visible to registered users. So if you're not signed in, you can't see any data (except the data we publish, like the EMC Fest location for this year). We can also add other markers (NAMES maybe? or any other emc events..). If you're still uncomfortable with adding your address, the City name should be more than enough. Regards, Alex Peter Blodow wrote I wonder what treasures you are sitting upon on your piece of property in Suffolk. Hi Peter, No use looking for me in Suffolk - I'm in Sheffield, South Yorkshire.. the one that's famous for the world's best cutlery, knives and steel !! You would also have to look quite hard to find any real treasures although my home made and designed desktop miller and lathe combination gives me a lot of pleasure in the odd minutes I can take away from my, almost constant, grandparenting duties I don't think I have ever been to Bavaria although I love Austria - I must have a browse around Bavaria on Google Earth.. Best wishes, Ian -- Ian W. Wright Sheffield, South Yorkshire, UK -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] HAL Direction arrow conventions
As a new guy, I start my study of the HAL literature. Noting my questions, I thought to burden the group in a feeble jesture of participation ;-) this example quizzes me: To connect a signal to a pin we use the net command. halcmd: net X_vel = siggen.0.cosine To see the effect of the net command, we show the signals again: halcmd: show sigignals: Type Value Name float 0.0e+00 X_vel == siggen.0.cosine When a signal is connected to one or more pins, the show command lists the pins immediately following the signal name. The arrow shows the direction of data flow - in this case, data flows from pin siggen.0.cosine to signal X_vel. Now lets connect the X_vel to the velocity input of a step pulse generator: halcmd: net X_vel = freqgen.0.velocity We can also connect up the Y axis signal Y_vel. It is intended to run from the sine output of the signal generator to the input of the second step pulse generator. The following command accomplishes in one line what two net commands accomplished for X_vel: halcmd: net Y_vel siggen.0.sine = freqgen.1.velocity [end of quote] Why no arrow between Y_vel and siggen? Also, the machine reply == uses two =, is that significant? Perhaps additional study will explain it to me, but reading to this point has me wondering. TIA Cal -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] HAL Direction arrow conventions
I recently learned this myself... From the HAL manual section 1.1.4 net: The direction indicator = and = is only to make it easier to read for humans and is not used by net. HAL knows what can accept input and what can accept output and does what it needs to do automatically and will error if you try to make it do something it can't. Len -Original Message- From: cmg...@sover.net [mailto:cmg...@sover.net] Sent: Monday, April 13, 2009 4:51 PM To: Enhanced Machine Controller (EMC) Cc: Enhanced Machine Controller @sover.net Subject: [Emc-users] HAL Direction arrow conventions As a new guy, I start my study of the HAL literature. Noting my questions, I thought to burden the group in a feeble jesture of participation ;-) this example quizzes me: To connect a signal to a pin we use the net command. halcmd: net X_vel = siggen.0.cosine To see the effect of the net command, we show the signals again: halcmd: show sigignals: Type Value Name float 0.0e+00 X_vel == siggen.0.cosine When a signal is connected to one or more pins, the show command lists the pins immediately following the signal name. The arrow shows the direction of data flow - in this case, data flows from pin siggen.0.cosine to signal X_vel. Now let's connect the X_vel to the velocity input of a step pulse generator: halcmd: net X_vel = freqgen.0.velocity We can also connect up the Y axis signal Y_vel. It is intended to run from the sine output of the signal generator to the input of the second step pulse generator. The following command accomplishes in one line what two net commands accomplished for X_vel: halcmd: net Y_vel siggen.0.sine = freqgen.1.velocity [end of quote] Why no arrow between Y_vel and siggen? Also, the machine reply == uses two =, is that significant? Perhaps additional study will explain it to me, but reading to this point has me wondering. TIA Cal -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] HAL Direction arrow conventions
Thanks Len! I recently learned this myself... From the HAL manual section 1.1.4 net: The direction indicator = and = is only to make it easier to read for humans and is not used by net. HAL knows what can accept input and what can accept output and does what it needs to do automatically and will error if you try to make it do something it can't. Len -Original Message- From: cmg...@sover.net [mailto:cmg...@sover.net] Sent: Monday, April 13, 2009 4:51 PM To: Enhanced Machine Controller (EMC) Cc: Enhanced Machine Controller @sover.net Subject: [Emc-users] HAL Direction arrow conventions As a new guy, I start my study of the HAL literature. Noting my questions, I thought to burden the group in a feeble jesture of participation ;-) this example quizzes me: To connect a signal to a pin we use the net command. halcmd: net X_vel = siggen.0.cosine To see the effect of the net command, we show the signals again: halcmd: show sigignals: Type Value Name float 0.0e+00 X_vel == siggen.0.cosine When a signal is connected to one or more pins, the show command lists the pins immediately following the signal name. The arrow shows the direction of data flow - in this case, data flows from pin siggen.0.cosine to signal X_vel. Now let's connect the X_vel to the velocity input of a step pulse generator: halcmd: net X_vel = freqgen.0.velocity We can also connect up the Y axis signal Y_vel. It is intended to run from the sine output of the signal generator to the input of the second step pulse generator. The following command accomplishes in one line what two net commands accomplished for X_vel: halcmd: net Y_vel siggen.0.sine = freqgen.1.velocity [end of quote] Why no arrow between Y_vel and siggen? Also, the machine reply == uses two =, is that significant? Perhaps additional study will explain it to me, but reading to this point has me wondering. TIA Cal -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] probe_parport; what does it do?
probe_parport enables ISA PNP parallel ports which are not assigned an I/O address by the BIOS. probe_parport is expected to have no effect for PCI parports. Some on-board parports behave like ISA PNP ports, though. Jeff -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Users Locations
Winter event - Cabin Fever in York, PA every January or so. On Mon, Apr 13, 2009 at 5:34 PM, Alex Joni alex.j...@robcon.ro wrote: I hacked the map some more, and now the markers should only be visible to registered users. So if you're not signed in, you can't see any data (except the data we publish, like the EMC Fest location for this year). We can also add other markers (NAMES maybe? or any other emc events..). If you're still uncomfortable with adding your address, the City name should be more than enough. Regards, Alex Peter Blodow wrote I wonder what treasures you are sitting upon on your piece of property in Suffolk. Hi Peter, No use looking for me in Suffolk - I'm in Sheffield, South Yorkshire.. the one that's famous for the world's best cutlery, knives and steel !! You would also have to look quite hard to find any real treasures although my home made and designed desktop miller and lathe combination gives me a lot of pleasure in the odd minutes I can take away from my, almost constant, grandparenting duties I don't think I have ever been to Bavaria although I love Austria - I must have a browse around Bavaria on Google Earth.. Best wishes, Ian -- Ian W. Wright Sheffield, South Yorkshire, UK -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] HAL Direction arrow conventions
I think the hal syntax is a pretty neat way to wire up a directed acyclic graph. I've played with graph programming for a very long time and here is another syntax that, one day, we may want to think about: value= function( input1, input2, ..., inputN ) more_output = another_function( value, 5 ) repeat... etc What is nice about the syntax is that it looks like regular functional programming and yet it actually wires a graph at the same time. Everything to the right of '=' is an rvalue or input pin; everything to the left is an lvalue or output pin. Another idea is that anything that outputs multiple pins could be dereferenced using matrix or pointer notation. E.g. Output[0] or output.0 Just ideas for thought. - Mike -Original Message- From: cmg...@sover.net [mailto:cmg...@sover.net] Sent: Monday, April 13, 2009 7:36 PM To: Enhanced Machine Controller (EMC) Cc: 'Enhanced Machine Controller ' Subject: Re: [Emc-users] HAL Direction arrow conventions Thanks Len! I recently learned this myself... From the HAL manual section 1.1.4 net: The direction indicator = and = is only to make it easier to read for humans and is not used by net. HAL knows what can accept input and what can accept output and does what it needs to do automatically and will error if you try to make it do something it can't. Len -Original Message- From: cmg...@sover.net [mailto:cmg...@sover.net] Sent: Monday, April 13, 2009 4:51 PM To: Enhanced Machine Controller (EMC) Cc: Enhanced Machine Controller @sover.net Subject: [Emc-users] HAL Direction arrow conventions As a new guy, I start my study of the HAL literature. Noting my questions, I thought to burden the group in a feeble jesture of participation ;-) this example quizzes me: To connect a signal to a pin we use the net command. halcmd: net X_vel = siggen.0.cosine To see the effect of the net command, we show the signals again: halcmd: show sigignals: Type Value Name float 0.0e+00 X_vel == siggen.0.cosine When a signal is connected to one or more pins, the show command lists the pins immediately following the signal name. The arrow shows the direction of data flow - in this case, data flows from pin siggen.0.cosine to signal X_vel. Now let's connect the X_vel to the velocity input of a step pulse generator: halcmd: net X_vel = freqgen.0.velocity We can also connect up the Y axis signal Y_vel. It is intended to run from the sine output of the signal generator to the input of the second step pulse generator. The following command accomplishes in one line what two net commands accomplished for X_vel: halcmd: net Y_vel siggen.0.sine = freqgen.1.velocity [end of quote] Why no arrow between Y_vel and siggen? Also, the machine reply == uses two =, is that significant? Perhaps additional study will explain it to me, but reading to this point has me wondering. TIA Cal -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Users Locations
Perhaps the intent of my remarks were misunderstood, or at least buried by others concerns. My point was that a casual visitor to the web site would have no idea that the map or forums even existed. For me at least, it is not possible to see any of the above without registering and logging into the system. Steve Stallings -Original Message- From: Alex Joni [mailto:alex.j...@robcon.ro] Sent: Monday, April 13, 2009 5:34 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Users Locations I hacked the map some more, and now the markers should only be visible to registered users. So if you're not signed in, you can't see any data (except the data we publish, like the EMC Fest location for this year). We can also add other markers (NAMES maybe? or any other emc events..). If you're still uncomfortable with adding your address, the City name should be more than enough. Regards, Alex Peter Blodow wrote I wonder what treasures you are sitting upon on your piece of property in Suffolk. Hi Peter, No use looking for me in Suffolk - I'm in Sheffield, South Yorkshire.. the one that's famous for the world's best cutlery, knives and steel !! You would also have to look quite hard to find any real treasures although my home made and designed desktop miller and lathe combination gives me a lot of pleasure in the odd minutes I can take away from my, almost constant, grandparenting duties I don't think I have ever been to Bavaria although I love Austria - I must have a browse around Bavaria on Google Earth.. Best wishes, Ian -- Ian W. Wright Sheffield, South Yorkshire, UK -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] What's coming in manufacturing
Doug Pollard wrote: I am am almost 75 years old and some kind of excited about this new industrial revolution that is creeping up on us all. snip Wouldn't it be something if free software changed the economy of the whole world?? I find this really exciting stuff and it seems it may go as far as you can imagine. Well, you may be overestimating the impact of things like EMC, at least so far. And, there have been people making products out of their houses for quite some time. This may be more of a de-revolution than a revolution, going to back before the industrial revolution, except using high technology instead of a guy making a boot every couple days. Jon -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Users Locations
Alex, Thank you for your work. This is an awesome feature! Sincerely, Patrice Portland, OR -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Lathe Threading Issues
I'm quoting a message from an EMC user to see if anyone else has seen any signs of this problem. richard harris wrote: Jon, i got a chance to run halscope today and on coarse threads 13 tpi it will occasionally not reset the encoder count, count is numerically low when it does reset 25k. I do not see this when i run fine threads 18 tpi. When the count does not reset the threading cycle will rapid the tool. I verified that I am running emc2 2.2.6, UPC SN 33 rev 2.3, US digital 500 line encoder in a shielded cable with one side of the cable grounded. What should I look for in halscope to further diagnose the problem? I just ran several pieces at 12 TPI, using a program derived from the EMC sample program threading.ngc One interesting quirk I did see was that the finish end of the thread was compressed to a higher TPI. I re-ran it at lower spindle speed and it was fine. I'm not sure how that particular program figures out how soon to pull out at the end. It shows up on the coarser threads due to the Z motion beginning to decelerate earlier, I'm guessing? Anyway, I don't know how many passes the sample program performs, it looks like about 20. So, I have run it for at least 40 passes here without ANY blips at all. How occasionally is it? Once per thousand or once in ten passes? I am NOT running 2.2.6 here, the directory says 2.2.7, but I'm sure this was compiled from CVS source on 11/29/2008. I am also using a much finer resolution encoder, it has 1728 lines, or 6912 counts/rev. That also shouldn't make any difference. What is the date code either scribed or on a printed label on the EPROM chip (U4) on the UPC? The final version for those older boards with the 5V FPGA chip was 5/2/07. But, that is the same version I am using on my minimill to test this problem. Finally, after thinking about this some, I find NO WAY the UPC board's encoder counter can POSSIBLY know what TPI thread you want to cut! That simply doesn't make sense. All it could possibly be affected by is spindle RPM, and the possibility that your encoder index pulse is somehow different at different RPM. I have certainly seen the rapid effect when the encoder fails to start from zero when the driver believes that the encoder DID see the index pulse. That is not supposed to happen with the latest UPC firmware. One last thing, coarser threads require more spindle HP, and probably more Z-axis power, too. Any possibility that more load on these motors could increase system noise? Have you run the diagnostic program in the commtest mode? If the diags show communication errors between the PC and the UPC, all bets are off! You might need to run the tests with the spindle drive on. Jon _ end of quote and my reply Anyway, I am running a different version of EMC here, compiled from CVS on 11/29/2008. Richard is apparently running an older version, 2.2.6 says it was released on 10-Aug-08, but I don't know when the code was actually locked up for that. But, it should still be recent enough to have all the changes that were important, as of about July 2007. So, does anyone else have experience with lathe threading or rigid tapping at 12 or less TPI? I don't see why that should matter to the encoder counter reset on index function, but that is what Mr. Harris reports. Jon -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Lathe Threading Issues
On Mon, Apr 13, 2009 at 09:48:40PM -0500, Jon Elson wrote: richard harris wrote: Jon, i got a chance to run halscope today and on coarse threads 13 tpi it will occasionally not reset the encoder count, count is numerically low when it does reset 25k. I do not see this when i run fine threads 18 tpi. When the count does not reset the threading cycle will rapid the tool. I would love to see plots of the behavior showing at least delta, index-enable, index, and count. -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] What's coming in manufacturing
Doug, I get the feeling EMC2 is on the cusp of full acceptance in the control world. It is amazingly close to the capability needed to compete with the old line commercial controls. It is just as capable and just as flexible. I only hesitate to claim it is more capable and flexible because with enough money the current commercial controls can do some incredible things. EMC2 is getting there for free. REVOLUTIONARY EXCITING thanks Stuart On Mon, Apr 13, 2009 at 9:29 PM, Jon Elson el...@pico-systems.com wrote: Doug Pollard wrote: I am am almost 75 years old and some kind of excited about this new industrial revolution that is creeping up on us all. snip Wouldn't it be something if free software changed the economy of the whole world?? I find this really exciting stuff and it seems it may go as far as you can imagine. Well, you may be overestimating the impact of things like EMC, at least so far. And, there have been people making products out of their houses for quite some time. This may be more of a de-revolution than a revolution, going to back before the industrial revolution, except using high technology instead of a guy making a boot every couple days. Jon -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- you can lead a person to knowledge but you cannot make him think -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] What's coming in manufacturing
Hear hear, These little home shops don't have to pay employee healthcare nor pay corporate taxes. They can likely pay the lower capital gains taxes on what their robots, cnc mills and Fab machines build. Things are not that different on the other side of the world (the Netherlands). Some guy in his back yard may well cast the parts in his back yard for me out of scrap metals. Well, there are all kinds of environmental issues on this. I do remember that a steel construction company in my old town used to produce a lot of welding fumes but nowadays due to law they have to filter all their welding fumes (so the smell of burning brakes really were burning brakes last week ...) These same people will not have to drive 20 miles to work everyday and may not wear out a car every ten years making that trip. Mass transit may be an idea that has come and is now going. During the industrial age we noticed that a lot of the small companies where vanishing and people started working at large companies. In the beginning these persons got housing nearby there workplace but meanwhile this changed and now the Dutch government finds it normal to have your work on an hour travel distance from home. Rush hour, traffic jams and air pollution are partly because of this. Things are changing; there is a tendency to return to our roots. Start your own small company or work for smaller companies in the area - as it used to be years ago. Thanks to the current financial crisis I am now getting a chance to contribute to this change; ST-Ericsson was kind enough to 'set me free' with a bit of capital to invest into my own future but without EMC2, and the machine I built, I would never have made this step. I am presently repairing microscopes but will soon be making medical parts for hospital beds, Xray machines etc. These will go freely all over the world where they are sorely needed and a big part of this will be, because of EMC 2. In my case EMC2 is an enabler to get started. I am not starting a production company - there are some CNC companies in my area able to do a better job (in larger series) than I am. I am doing the design and part of the programming and EMC2 is used to control my large gantry style machine to do some prototyping only. Still an amazing job, the last two weeks the machine was running 24/7 to create some very large foam plugs and MDF molds. I have also decided that some of this money needs to go to the writing of software like Emc 2 so I plan to donate some of what I make to help develop. Sounds a good thing. There is nothing about donations on the cnclinux website (actually there is; some python scripts state you must donate to a local food bank :-) ) except for donating your knowledge and sharing your experiences with other users. I agree with Kirk Wallace that bringing money into the game is a tricky thing. It will change the rules we play by. My donations go to the local food bank and to 'customers' who are starting up their own small company and cannot (yet) afford the investment in the sometimes expensive prototypes. Also the enviroment is a goal I am donating to in a direct way: almost all my transportation is done by bike or via public transportation and when possible I use materials that are recyclable. While the EMC2 team thinks about accepting donations, I will continue donating to our local community and the environment. One other thing we can do to donate is to enlist ourselves as an EMC2 user on www.linuxcnc.org by creating a user account and make yourself visible on the user map. On one side it is an acknowledgement to the EMC2 developers that their system is being used world wide, on the other side it is nice to see for ourselves where other users are located. Regards, Rob -- This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! http://p.sf.net/sfu/www-ibm-com ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
