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 axis move at the same time.. It does not happen if either axis alone or either two axis move at the same time. The 0.1 deviation changes if I change acceleration speed. Lower acceleration speed means lower deviation. The deviation also changes if I poke with FERROR and MIN_FERROR. Lower values result in higher deviation. If I set FERROR below about 0.05mm, the stepper will rattle over the whole travel (not just at the acceleration) and the deviation will be several millimeters. However, using high FERROR (1.0) and MIN_FERROR (0.2) values or even no FERROR and MIN_FERROR in the .ini file doesn't solve the problem. -- 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
