Re: [Emc-users] stepper gaining additional steps

2009-03-01 Thread Lars Andersson
: Re: [Emc-users] stepper gaining additional steps On Sunday 01 March 2009 15:17:34 Michael Buesch wrote: > On Sunday 01 March 2009 14:37:30 Michael Dark wrote: > > what happens when you swap drives z/y > > You mean swap the electronics parts that drive the axis (not swap > Z an

Re: [Emc-users] stepper gaining additional steps

2009-03-01 Thread Michael Buesch
On Sunday 01 March 2009 15:53:07 Michael Buesch wrote: > On Sunday 01 March 2009 15:17:34 Michael Buesch wrote: > > On Sunday 01 March 2009 14:37:30 Michael Dark wrote: > > > what happens when you swap drives z/y > > > > You mean swap the electronics parts that drive the axis (not swap > > Z and Y

Re: [Emc-users] stepper gaining additional steps

2009-03-01 Thread Dave Caroline
noise is a sure sign of stepper miss behaviour, slow the Z one down away from resonance Dave Caroline -- Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open

Re: [Emc-users] stepper gaining additional steps

2009-03-01 Thread Michael Buesch
On Sunday 01 March 2009 15:17:34 Michael Buesch wrote: > On Sunday 01 March 2009 14:37:30 Michael Dark wrote: > > what happens when you swap drives z/y > > You mean swap the electronics parts that drive the axis (not swap > Z and Y on the machine)? Sure, I can try that next. Just need to > swap th

Re: [Emc-users] stepper gaining additional steps

2009-03-01 Thread Michael Buesch
On Sunday 01 March 2009 14:35:54 Dave Caroline wrote: > Scope the signals, test using Stepconf on repeated reversals. > coupled noise could be on the power supply when all are running. > I had to add pull-ups and buffers to guarantee driving the stepper I use. Yeah well. I experimented with buffer

Re: [Emc-users] stepper gaining additional steps

2009-03-01 Thread Michael Buesch
On Sunday 01 March 2009 14:37:30 Michael Dark wrote: > what happens when you swap drives z/y You mean swap the electronics parts that drive the axis (not swap Z and Y on the machine)? Sure, I can try that next. Just need to swap the HAL pins and the high current connectors to the motors. -- Gree

Re: [Emc-users] stepper gaining additional steps

2009-03-01 Thread Michael Buesch
On Sunday 01 March 2009 14:59:40 Alex Joni wrote: > I notice you have compensation tables for each axis, > maybe that's where the extra 0.1 mm come from? No it's clearly additional steps being injected from somewhere. You can hear that from the motor noise. And it _only_ happens when all three axi

Re: [Emc-users] stepper gaining additional steps

2009-03-01 Thread Alex Joni
I notice you have compensation tables for each axis, maybe that's where the extra 0.1 mm come from? Regards, Alex - Original Message - From: "Michael Buesch" To: Sent: Sunday, March 01, 2009 2:33 PM Subject: [Emc-users] stepper gaining additional steps > H

Re: [Emc-users] stepper gaining additional steps

2009-03-01 Thread Michael Dark
what happens when you swap drives z/y On Sun, Mar 1, 2009 at 6:33 AM, Michael Buesch wrote: > Hi, > > I've got an interesting problem with my software-stepping desktop mill. > It works fine if I move one or two axis at the same time. But if I move 3 > axis at > the same time, the Z axis (which i

Re: [Emc-users] stepper gaining additional steps

2009-03-01 Thread Dave Caroline
Scope the signals, test using Stepconf on repeated reversals. coupled noise could be on the power supply when all are running. I had to add pull-ups and buffers to guarantee driving the stepper I use. Dave Caroline -- Ope

[Emc-users] stepper gaining additional steps

2009-03-01 Thread Michael Buesch
Hi, I've got an interesting problem with my software-stepping desktop mill. It works fine if I move one or two axis at the same time. But if I move 3 axis at the same time, the Z axis (which is the slowest) gains additional steps when it accelerates. I notice that the stepper motor makes strange