Well, I lowered my acceleration by 50% and the problem went away!! As always, Brian, you KNEW!! I guess I should have been watching the Gecko fault LED, but I NEVER THOUGHT of acceleration.
Thanks for that.
Now, how DOES one determine acceleration? I've been running with my accels at 7 for a long time. Suddenly it goes berserk! I set it to 3 for Z and the peck drilling works great. I don't actually notice much difference. Is there a procedure for determining optimum acceleration values? I have Keling servo motors on all three axes, KL34-180-90s, the big bruisers, a 72 volt PS, Gecko 320X/320 drives. CUI AMT-102 encoders at 400 line count. X and Y 24000 Steps per, Z 19200 Steps per. X/Y 100 IPM, could go to 150, Z 40 IPM, could go 50, Z is counterweighted knee on BP clone. Is determining accel a trial and error thing and I just happened to stumble on the break point, or is there a "scientific method"?
Tom