2012/1/28 Peter C. Wallace <p...@mesanet.com>: > > OK so commutation is ok, but somthing is funny here. You said it oscillated > even with a P of 1 and all else 0. Did it not oscillate with a P of 3? > what is the difference between the setup now and when it oscillates? >
I will try to explain: I am trying to tune 2 motors simultaneously, because it is a gantry machine. So what I did few minutes ago: For both motors: all PID parameters set to 0 P = 3 I tried to jog the gantry at slow speed. At 240 mm/min it is smooth, at 480 mm/min still smooth, but at 676 mm/min there are spots, when one of motors stalls and oscillates in small amount at high frequency. I suspect that the stalling is due to some uneven load to motor, when moving forward. Anyway, I d not know, how to overcome such stalls and subsequent oscillation. Hitting F2 to disable and re-enable motion stops oscillation and I can jog forward. Until one of motors stalls and starts vibrating again. I do understand that final settings for both gantry motors might differ, I just think that in the beginning they could be tuned together as both of them are stalling now. Viesturs ------------------------------------------------------------------------------ Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
