Re: [Emc-users] slow speed stepping - am I missing something?

2013-08-06 Thread John Alexander Stewart
Hi all; Just for the email record in case others come by and google: The Sieg KX1 mill I have has on X/Y axis YK57HB76-03A and on the Z axis YK60HB86-04A steppers. This mill is sold by ArcEuroTrade, and LittleMachineShop (pn# 3501), plus others, I'd guess. Mine came as a "KX1-NU" from Novakon o

Re: [Emc-users] slow speed stepping - am I missing something?

2013-08-06 Thread John Alexander Stewart
Hi Kirk; Can you get single steps to move the motor? I would try ... All interesting suggestions. I did wish that the G540 could have microstepping disabled, but does not seem possible. It would appear (more stress testing today) that the issue was that I was close to the speed limit on the op

Re: [Emc-users] slow speed stepping - am I missing something?

2013-08-05 Thread Kirk Wallace
On 08/05/2013 11:38 AM, John Alexander Stewart wrote: ... snip > > This is a little Seig KX1 that I got with steppers but without the > electronics - 5i25, g540, 48v switching power supply have been added. > > I do everything in metric. > > I'll be able to get to the machine in a couple of hours a

Re: [Emc-users] slow speed stepping - am I missing something?

2013-08-05 Thread Steve Blackmore
On Mon, 5 Aug 2013 16:26:21 +0100, you wrote: >On 5 August 2013 16:05, John Alexander Stewart wrote: > >> 2) Here's my 5i25 config section for the G540: > >> setp hm2_5i25.0.stepgen.01.position-scale [AXIS_1]SCALE >> setp hm2_5i25.0.stepgen.01.steplen 1500 >> setp hm2_5i25.0.stepgen.01.stepspace

Re: [Emc-users] slow speed stepping - am I missing something?

2013-08-05 Thread Lars Andersson
I have two G540 units. One of them refuses to step on the Y channel when the step rate is below 110Hz. If the step rate is slowly lowered the stepping stops very cleanly at 110 Hz. This is not affected by step pulse length. I communicated with Geckdrive about this and it was a suspected fault i

Re: [Emc-users] slow speed stepping - am I missing something?

2013-08-05 Thread John Alexander Stewart
I'm testing a 1mm/min move, repeating {g1 x1.0, pause, g0 x0, pause} kind of tests. With > setp hm2_5i25.0.stepgen.01.steplen 1500 > setp hm2_5i25.0.stepgen.01.stepspace 2500 > setp hm2_5i25.0.stepgen.01.dirhold 2000 > setp hm2_5i25.0.stepgen.01.dirsetup 2000 changed to 6,000 for each parameter

Re: [Emc-users] slow speed stepping - am I missing something?

2013-08-05 Thread John Alexander Stewart
Peter; What is the stepgens ferror limit? (If ferror is set for a reasonably small > limit, this will check that the stepgen hardware generated the correct > number > of step pulses) > It's probably better if I don't try to second guess what may be of importance. The ini and hal files are attache

Re: [Emc-users] slow speed stepping - am I missing something?

2013-08-05 Thread Gene Heskett
On Monday 05 August 2013 12:55:21 andy pugh did opine: > On 5 August 2013 16:05, John Alexander Stewart wrote: > > 2) Here's my 5i25 config section for the G540: > > > > setp hm2_5i25.0.stepgen.01.position-scale [AXIS_1]SCALE > > setp hm2_5i25.0.stepgen.01.steplen 1500 > > setp hm2_5i25.0.stepg

Re: [Emc-users] slow speed stepping - am I missing something?

2013-08-05 Thread Peter C. Wallace
On Mon, 5 Aug 2013, John Alexander Stewart wrote: > Date: Mon, 5 Aug 2013 11:05:30 -0400 > From: John Alexander Stewart > Reply-To: "Enhanced Machine Controller (EMC)" > > To: "Enhanced Machine Controller (EMC)" > Subject: Re: [Emc-users] slow s

Re: [Emc-users] slow speed stepping - am I missing something?

2013-08-05 Thread andy pugh
On 5 August 2013 16:26, andy pugh wrote: > I would try doubling all these as an experiment. I would also try inverting the step pin. It isn't clear to me if the drive uses positive or negative logic. My drives are opto-input and definitely use negative logic. -- atp If you can't fix it, you do

Re: [Emc-users] slow speed stepping - am I missing something?

2013-08-05 Thread andy pugh
On 5 August 2013 16:05, John Alexander Stewart wrote: > 2) Here's my 5i25 config section for the G540: > setp hm2_5i25.0.stepgen.01.position-scale [AXIS_1]SCALE > setp hm2_5i25.0.stepgen.01.steplen 1500 > setp hm2_5i25.0.stepgen.01.stepspace 2500 > setp hm2_5i25.0.stepgen.01.dirhold 2000 > setp

Re: [Emc-users] slow speed stepping - am I missing something?

2013-08-05 Thread Gene Heskett
On Monday 05 August 2013 11:12:43 John Alexander Stewart did opine: > Ok, so bumping up current to 3A from 2.2A this morning did not change > anything. > > The power supply is a 48v switcher from Keiling; I'm thinking of > removing all other axes and just testing one axis, and/or find another > p

Re: [Emc-users] slow speed stepping - am I missing something?

2013-08-05 Thread John Alexander Stewart
Ok, so bumping up current to 3A from 2.2A this morning did not change anything. The power supply is a 48v switcher from Keiling; I'm thinking of removing all other axes and just testing one axis, and/or find another power supply to see if it might be the issue. Two questions, for those who are br

Re: [Emc-users] slow speed stepping - am I missing something?

2013-08-05 Thread John Alexander Stewart
Two interesting suggestions to check - two that I would not have thought of. We'll see what happens today - I should have a good few hours to work on it. Thanks - JohnS. -- Get your SQL database under version control now!

Re: [Emc-users] slow speed stepping - am I missing something?

2013-08-04 Thread andy pugh
On 4 August 2013 21:51, John Alexander Stewart wrote: > Should I be able to? Absolutely. Going very slowly is what steppers are best at. I wonder if something is (Accidentally) AC-coupled somewhere? -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ---

Re: [Emc-users] slow speed stepping - am I missing something?

2013-08-04 Thread Marius Liebenberg
Stewart Have a look at the timing requirements for the G540. As far as I recall it needs some longer pulses. You have to set the step pulse length as well as some other settings. There is some wiki stuff about this. On 2013/08/04 10:51 PM, John Alexander Stewart wrote: > I have a stepper based m