Re: [Emc-users] G540, 5i25, missing steps, once again.
Ben, Riccardo; Maybe I have to re-think this issue on my G540. Been off doing other things recently, so no more work done on my mill. Q: no documents close by, so maybe a dumb question. How did you invert the step outputs? Q2: What timing parameters are you using? (steplen, stepspace, dirhold, dirsetup) Thank you - JohnS -- Slashdot TV. Video for Nerds. Stuff that matters. http://tv.slashdot.org/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] G540, 5i25, missing steps, once again.
I had had similiar issues quite awhile back. Looking at my my ini. I have DIRSETUP = 400 DIRHOLD = 400 STEPLEN = 5000 STEPSPACE = 5000 On Fri, Aug 22, 2014 at 8:29 AM, John Alexander Stewart ivatt...@gmail.com wrote: Ben, Riccardo; Maybe I have to re-think this issue on my G540. Been off doing other things recently, so no more work done on my mill. Q: no documents close by, so maybe a dumb question. How did you invert the step outputs? Q2: What timing parameters are you using? (steplen, stepspace, dirhold, dirsetup) Thank you - JohnS -- Slashdot TV. Video for Nerds. Stuff that matters. http://tv.slashdot.org/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Slashdot TV. Video for Nerds. Stuff that matters. http://tv.slashdot.org/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] G540, 5i25, missing steps, once again.
My old thread: http://comments.gmane.org/gmane.linux.distributions.emc.user/38373 On Fri, Aug 22, 2014 at 9:23 AM, Bryce Johnson sie...@gmail.com wrote: I had had similiar issues quite awhile back. Looking at my my ini. I have DIRSETUP = 400 DIRHOLD = 400 STEPLEN = 5000 STEPSPACE = 5000 On Fri, Aug 22, 2014 at 8:29 AM, John Alexander Stewart ivatt...@gmail.com wrote: Ben, Riccardo; Maybe I have to re-think this issue on my G540. Been off doing other things recently, so no more work done on my mill. Q: no documents close by, so maybe a dumb question. How did you invert the step outputs? Q2: What timing parameters are you using? (steplen, stepspace, dirhold, dirsetup) Thank you - JohnS -- Slashdot TV. Video for Nerds. Stuff that matters. http://tv.slashdot.org/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Slashdot TV. Video for Nerds. Stuff that matters. http://tv.slashdot.org/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] G540, 5i25, missing steps, once again.
On Friday 22 August 2014 09:29:21 John Alexander Stewart did opine And Gene did reply: Ben, Riccardo; Maybe I have to re-think this issue on my G540. Been off doing other things recently, so no more work done on my mill. Q: no documents close by, so maybe a dumb question. How did you invert the step outputs? If you have mentioned your interface method, I have forgotten it, so its possible there is a better way than below. One of the easiest ways, if your G540 brings out both ends of the opto's led, is to swap the two opto's leads around at the + and - terminals. I can do that with my 2M542's also, but no idea unless its in the data on the g540 on the Gecko web pages. I do not know enough about the G540 to know if they do make both ends of the opto's leds available. I just downloaded the manual, and cannot find anything to indicate that it is possible to self invert the signals. This also depends on the output power of your BOB, BreakOut Board. The board I have used twice now is the cnc4pc C1G, which can sink or source 24 milli-amps, more than enough to drive an opto. It can also do a polarity swap on a more global basis by selecting whether the com pins are at ground or at the 5 volt rail, which would select the active polarity, but does it for several of the com pins together, inverting things more wholesale if you need a lot of its control inverted. But again, this demands that the opto's being driven have both the + and - terminals exposed for your use. Some of the Mesa cards such as the 5i25 can be programmed in your .hal file so that the output is inverted, and I have done that on two of its stepgen modules because the dir output was backwards. I also could have done this by interchanging the wires to the dir opto in my 2M542's, but that would have required wiring up individual - terminals, which I did not do when I assembled that box originally. I don't know if anyone is making a by the line invertor but I could see a market for a few of them. A card with 4 each 4 wide xor CMOS IC's would allow any line of 24 to be inverted individually, doubly useful for you if rigged to db25's on both sides. UNK if anyone is making it though... Q2: What timing parameters are you using? (steplen, stepspace, dirhold, dirsetup) The gecko g540 pdf says 2000ns for steplen and stepspace, and 200ns for dirsetup dirhold. Those latter 2 sound a bit short to me, but thats just an old CET's opinion. There is a page in the wiki that gives recommended times for quite a lengthy list of drivers, see wiki.linuxcnc.org if you have not already. Thank you - JohnS --- --- Slashdot TV. Video for Nerds. Stuff that matters. http://tv.slashdot.org/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene Heskett -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) Genes Web page http://geneslinuxbox.net:6309/gene US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS -- Slashdot TV. Video for Nerds. Stuff that matters. http://tv.slashdot.org/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] G540, 5i25, missing steps, once again.
On 22 August 2014 14:29, John Alexander Stewart ivatt...@gmail.com wrote: Q: no documents close by, so maybe a dumb question. How did you invert the step outputs? With software step generation you either tick the invert box in stepconf, or add a line to the HAL. ( http://linuxcnc.org/docs/html/hal/parallel_port.html#_parameters ) With a Mesa board you set the invert_output parameter on the GPIO pin that corresponds to the stepgen step line: http://linuxcnc.org/docs/html/man/man9/hostmot2.9.html#General Purpose I/O -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Slashdot TV. Video for Nerds. Stuff that matters. http://tv.slashdot.org/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] G540, 5i25, missing steps, once again.
From: John Alexander Stewart Sent: 22 August 2014 14:29 Subject: Re: [Emc-users] G540, 5i25, missing steps, once again. Ben, Riccardo; Maybe I have to re-think this issue on my G540. Been off doing other things recently, so no more work done on my mill. Q: no documents close by, so maybe a dumb question. How did you invert the step outputs? Andy has got in before me - but: setp hm2_5i25.0.gpio.xxx.invert_output true where xxx is the pin number for the stepgen step output. Q2: What timing parameters are you using? (steplen, stepspace, dirhold, dirsetup) 2000, 2000, 700, 700 - these are probably a bit higher than is actually needed - but allow a high enough step rate for my machine. Good luck. Ben -- Slashdot TV. Video for Nerds. Stuff that matters. http://tv.slashdot.org/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] G540, 5i25, missing steps, once again.
Couldnt agree more with Ben Potter comment about inverting stepgen signals . I pull my hair out trying to debug this, hundreds of test later i came to the same conclusion. The problem was on one axis only in mine too.. regards rick 2014-08-10 18:51 GMT-03:00 Ben Potter b...@bpuk.org: Very late to this discussion. I had this problem about a month back, with an incredible amount of frustration. In the end I found that on my G540 I had to invert the stepgen output. When inverted, no problems, when noninverted - one axis only would slowly slip regardless of step timings. I'm stuffed if I know _why_ inverting the step output would affect the drives behaviour to this degree - but if all else fails... -Original Message- From: John Alexander Stewart [mailto:ivatt...@gmail.com] Sent: 10 August 2014 22:21 To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] G540, 5i25, missing steps, once again. Yes! Success! setp hm2_5i25.0.stepgen.00.position-scale [AXIS_0]SCALE setp hm2_5i25.0.stepgen.00.steplen 2500 setp hm2_5i25.0.stepgen.00.stepspace 2500 setp hm2_5i25.0.stepgen.00.dirhold 2500 setp hm2_5i25.0.stepgen.00.dirsetup 2500 worked, no axis slip over a 4 hour test. I think I'll set everything up with even more time, and call it a day (or, 4 weekend days, to tell you how long I've been looking at this) Thanks all! -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Slashdot TV. Video for Nerds. Stuff that matters. http://tv.slashdot.org/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] G540, 5i25, missing steps, once again.
On Thursday 21 August 2014 10:56:33 Ricardo Moscoloni did opine And Gene did reply: Couldnt agree more with Ben Potter comment about inverting stepgen signals . I pull my hair out trying to debug this, hundreds of test later i came to the same conclusion. The problem was on one axis only in mine too.. regards rick Just to clarify this in my own wet ram, I am used to seeing, for a slow speed command, a narrow positive pulse at my BOB's output on an external oscilloscope. However, with the 2m542 drivers, I could use either polarity as the BOB can drive both ways, and the 2m542 input is independent therefore reversible, so the drive would not be aware of the difference. I don't know anything about the G540's, do they bring out both ends of the opto? If they do, the same trick should work for them. I suspect, from the conversations I've copied here, that the gecko drives only accept a direction change in the between steps state. And if the step polarity is wrong, the dirhold and dirsetup constraints are probably being violated. If micro-stepping, its not going to be very much per direction reversal and would take a while for the error to be noticeable. But there it is. One way to possibly check this is to setup a dial on the axis, and let the stepgen configuration run it back and forth 20 thou at a speed that won't kill the indicator gears and see if the dial stops at the same place over an extended period of time. 2014-08-10 18:51 GMT-03:00 Ben Potter b...@bpuk.org: Very late to this discussion. I had this problem about a month back, with an incredible amount of frustration. In the end I found that on my G540 I had to invert the stepgen output. When inverted, no problems, when noninverted - one axis only would slowly slip regardless of step timings. I'm stuffed if I know _why_ inverting the step output would affect the drives behaviour to this degree - but if all else fails... -Original Message- From: John Alexander Stewart [mailto:ivatt...@gmail.com] Sent: 10 August 2014 22:21 To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] G540, 5i25, missing steps, once again. Yes! Success! setp hm2_5i25.0.stepgen.00.position-scale [AXIS_0]SCALE setp hm2_5i25.0.stepgen.00.steplen 2500 setp hm2_5i25.0.stepgen.00.stepspace 2500 setp hm2_5i25.0.stepgen.00.dirhold 2500 setp hm2_5i25.0.stepgen.00.dirsetup 2500 worked, no axis slip over a 4 hour test. I think I'll set everything up with even more time, and call it a day (or, 4 weekend days, to tell you how long I've been looking at this) Thanks all! - --- -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users - - ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users --- --- Slashdot TV. Video for Nerds. Stuff that matters. http://tv.slashdot.org/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene Heskett -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) Genes Web page http://geneslinuxbox.net:6309/gene US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS -- Slashdot TV. Video for Nerds. Stuff that matters. http://tv.slashdot.org/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] G540, 5i25, missing steps, once again.
On Sun, 10 Aug 2014, John Alexander Stewart wrote: Date: Sun, 10 Aug 2014 12:52:19 -0400 From: John Alexander Stewart ivatt...@gmail.com Reply-To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Subject: [Emc-users] G540, 5i25, missing steps, once again. Hi all; I thought I had this fixed. running a 4 hour engraving process, and the X axis slowly moves. At the end, it is off, maybe, 0.3mm or so. (using centre drill before and after, you can see different points) I thought I had this fixed, because I've had this problem for a long time, now I find that the error is small, but still exists. - 5i25 has stepdir, etc, parameters set to 2,000 (all 4 of them) You might try setting the steptime a little longer, I have seen other cases where more margin is needed, unless your maximum steprate is getting close to 1/(steplength+stepspace), there is no disadvantage to using longer times and they improve your overall margins - The G540 motor is tuned as per directions. (tuned more than once) - Only X axis affected, and only in 1 direction. - machine slowed down, currently trying one where I increased accel parameters to slow down any jerking. I'm beginning to think that the G540 is not working quite right, as I've spent (probably, over the last year) about 1 week on fixing this X axis slip. What would you guys try? -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your ()_() signature to help him gain world domination. -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] G540, 5i25, missing steps, once again.
divide and conquer eg swap driver to another axis, that eliminates the driver leaving mechanics or the interface to the driver (timing/levels) mechanics, I have had couplings slip interfacing, bad timing delay from the reversal to the first step driver not seeing levels correctly (opto not driven hard enough) Dave Caroline On 10/08/2014, John Alexander Stewart ivatt...@gmail.com wrote: Hi all; I thought I had this fixed. running a 4 hour engraving process, and the X axis slowly moves. At the end, it is off, maybe, 0.3mm or so. (using centre drill before and after, you can see different points) I thought I had this fixed, because I've had this problem for a long time, now I find that the error is small, but still exists. - 5i25 has stepdir, etc, parameters set to 2,000 (all 4 of them) - The G540 motor is tuned as per directions. (tuned more than once) - Only X axis affected, and only in 1 direction. - machine slowed down, currently trying one where I increased accel parameters to slow down any jerking. I'm beginning to think that the G540 is not working quite right, as I've spent (probably, over the last year) about 1 week on fixing this X axis slip. What would you guys try? -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] G540, 5i25, missing steps, once again.
Thanks guys - will try the increase for steptime to 2500; let it run for another 4 hours (no spindle speed; not much noise) Dave - had thought of doing this - X and Y axes are identical steppers; have to peek at the config again and see if the limit switches need moving wires. We'll see if the steptime helps first, though. Sigh! Thanks - JohnS. On Sun, Aug 10, 2014 at 1:18 PM, Dave Caroline dave.thearchiv...@gmail.com wrote: divide and conquer eg swap driver to another axis, that eliminates the driver leaving mechanics or the interface to the driver (timing/levels) mechanics, I have had couplings slip interfacing, bad timing delay from the reversal to the first step driver not seeing levels correctly (opto not driven hard enough) Dave Caroline On 10/08/2014, John Alexander Stewart ivatt...@gmail.com wrote: Hi all; I thought I had this fixed. running a 4 hour engraving process, and the X axis slowly moves. At the end, it is off, maybe, 0.3mm or so. (using centre drill before and after, you can see different points) I thought I had this fixed, because I've had this problem for a long time, now I find that the error is small, but still exists. - 5i25 has stepdir, etc, parameters set to 2,000 (all 4 of them) - The G540 motor is tuned as per directions. (tuned more than once) - Only X axis affected, and only in 1 direction. - machine slowed down, currently trying one where I increased accel parameters to slow down any jerking. I'm beginning to think that the G540 is not working quite right, as I've spent (probably, over the last year) about 1 week on fixing this X axis slip. What would you guys try? -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] G540, 5i25, missing steps, once again.
The G540 has four identical plug-in modules inside the box. You could pop the lid off the box and swap two modules without undoing any wiring. -- Ralph From: John Alexander Stewart [ivatt...@gmail.com] Sent: Sunday, August 10, 2014 11:02 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] G540, 5i25, missing steps, once again. Thanks guys - will try the increase for steptime to 2500; let it run for another 4 hours (no spindle speed; not much noise) Dave - had thought of doing this - X and Y axes are identical steppers; have to peek at the config again and see if the limit switches need moving wires. We'll see if the steptime helps first, though. Sigh! Thanks - JohnS. On Sun, Aug 10, 2014 at 1:18 PM, Dave Caroline dave.thearchiv...@gmail.com wrote: divide and conquer eg swap driver to another axis, that eliminates the driver leaving mechanics or the interface to the driver (timing/levels) mechanics, I have had couplings slip interfacing, bad timing delay from the reversal to the first step driver not seeing levels correctly (opto not driven hard enough) Dave Caroline On 10/08/2014, John Alexander Stewart ivatt...@gmail.com wrote: Hi all; I thought I had this fixed. running a 4 hour engraving process, and the X axis slowly moves. At the end, it is off, maybe, 0.3mm or so. (using centre drill before and after, you can see different points) I thought I had this fixed, because I've had this problem for a long time, now I find that the error is small, but still exists. - 5i25 has stepdir, etc, parameters set to 2,000 (all 4 of them) - The G540 motor is tuned as per directions. (tuned more than once) - Only X axis affected, and only in 1 direction. - machine slowed down, currently trying one where I increased accel parameters to slow down any jerking. I'm beginning to think that the G540 is not working quite right, as I've spent (probably, over the last year) about 1 week on fixing this X axis slip. What would you guys try? -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] G540, 5i25, missing steps, once again.
On Sunday 10 August 2014 13:10:15 Peter C. Wallace did opine And Gene did reply: On Sun, 10 Aug 2014, John Alexander Stewart wrote: Date: Sun, 10 Aug 2014 12:52:19 -0400 From: John Alexander Stewart ivatt...@gmail.com Reply-To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Subject: [Emc-users] G540, 5i25, missing steps, once again. Hi all; I thought I had this fixed. running a 4 hour engraving process, and the X axis slowly moves. At the end, it is off, maybe, 0.3mm or so. (using centre drill before and after, you can see different points) I thought I had this fixed, because I've had this problem for a long time, now I find that the error is small, but still exists. - 5i25 has stepdir, etc, parameters set to 2,000 (all 4 of them) You might try setting the steptime a little longer, I have seen other cases where more margin is needed, unless your maximum steprate is getting close to 1/(steplength+stepspace), there is no disadvantage to using longer times and they improve your overall margins I will concur with Peter, but would also lengthen the dirsetup and dirhold times by another 1000ns, or one microsecond of additional time for all 4 of those signal specs. There is a page in the wiki that lists the required times for a quite long list of drivers, and I have had zero problems since adding 1 microsecond to all 4 timing specs listed for my 2M542 drivers. - The G540 motor is tuned as per directions. (tuned more than once) - Only X axis affected, and only in 1 direction. - machine slowed down, currently trying one where I increased accel parameters to slow down any jerking. I'm beginning to think that the G540 is not working quite right, as I've spent (probably, over the last year) about 1 week on fixing this X axis slip. What would you guys try? Cheers, Gene Heskett -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) Genes Web page http://geneslinuxbox.net:6309/gene US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] G540, 5i25, missing steps, once again.
I can offer something to look for, but no fix. I have 2 G540 drivers, looks identical. One is without problems. The other very distincly stops stepping on the Y channel when the step rate goes below 150 Hz. (So a circle will have two flat spots) This can be seen also when feeding with a lab type pulse generator. I do not know why. The pulse timing I use is very conservative. I have discussed this problem with Gecko, the only solution is to send the drive for repair. (Shipping cost from Sweden easily buys me a new one) I live with this, the faulty drive sits on a machine that only needs three stepper channels. Hi all; I thought I had this fixed. running a 4 hour engraving process, and the X axis slowly moves. At the end, it is off, maybe, 0.3mm or so. (using centre drill before and after, you can see different points) I thought I had this fixed, because I've had this problem for a long time, now I find that the error is small, but still exists. - 5i25 has stepdir, etc, parameters set to 2,000 (all 4 of them) - The G540 motor is tuned as per directions. (tuned more than once) - Only X axis affected, and only in 1 direction. - machine slowed down, currently trying one where I increased accel parameters to slow down any jerking. I'm beginning to think that the G540 is not working quite right, as I've spent (probably, over the last year) about 1 week on fixing this X axis slip. What would you guys try? -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] G540, 5i25, missing steps, once again.
Yes! Success! setp hm2_5i25.0.stepgen.00.position-scale [AXIS_0]SCALE setp hm2_5i25.0.stepgen.00.steplen 2500 setp hm2_5i25.0.stepgen.00.stepspace 2500 setp hm2_5i25.0.stepgen.00.dirhold 2500 setp hm2_5i25.0.stepgen.00.dirsetup 2500 worked, no axis slip over a 4 hour test. I think I'll set everything up with even more time, and call it a day (or, 4 weekend days, to tell you how long I've been looking at this) Thanks all! -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] G540, 5i25, missing steps, once again.
Very late to this discussion. I had this problem about a month back, with an incredible amount of frustration. In the end I found that on my G540 I had to invert the stepgen output. When inverted, no problems, when noninverted - one axis only would slowly slip regardless of step timings. I'm stuffed if I know _why_ inverting the step output would affect the drives behaviour to this degree - but if all else fails... -Original Message- From: John Alexander Stewart [mailto:ivatt...@gmail.com] Sent: 10 August 2014 22:21 To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] G540, 5i25, missing steps, once again. Yes! Success! setp hm2_5i25.0.stepgen.00.position-scale [AXIS_0]SCALE setp hm2_5i25.0.stepgen.00.steplen 2500 setp hm2_5i25.0.stepgen.00.stepspace 2500 setp hm2_5i25.0.stepgen.00.dirhold 2500 setp hm2_5i25.0.stepgen.00.dirsetup 2500 worked, no axis slip over a 4 hour test. I think I'll set everything up with even more time, and call it a day (or, 4 weekend days, to tell you how long I've been looking at this) Thanks all! -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
