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" <m...@bu3sch.de> To: <emc-users@lists.sourceforge.net> Sent: Sunday, March 01, 2009 2:33 PM Subject: [Emc-users] stepper gaining additional steps > 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 noises while doing this. > > So the Z axis will end up traveling about 0.1mm more than programmed. > The additional steps only happen at acceleration time. After the joint > accelerated to full > speed it runs smoothly. > It only happens if all three axis move at the same time. > > I first suspected electrical interference in the parport signals or > something like that. > But if X and Y would interfere with Z signals, I'd expect that the Z axis > does also move > randomly when only X and Y are supposed to move. But it doesn't. Z is only > doing additional > steps when moving all axis at the same time and it only happens when > accelerating. > > I already tried to reduce the acceleration speed, but it didn't help much. > It reduced it > by a certain amount, but it's still there. > > Does somebody have an advice on how to debug this? > > -- > Greetings, Michael. > -------------------------------------------------------------------------------- > ------------------------------------------------------------------------------ > Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, > CA > -OSBC tackles the biggest issue in open source: Open Sourcing the > Enterprise > -Strategies to boost innovation and cut costs with open source > participation > -Receive a $600 discount off the registration fee with the source code: > SFAD > http://p.sf.net/sfu/XcvMzF8H -------------------------------------------------------------------------------- > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -------------------------------------------------------------------------------- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: 270.11.5/1978 - Release Date: 03/01/09 07:04:00 ------------------------------------------------------------------------------ Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
