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I've checked for vertical or laterial movement of shaft bearings and there isn't any. I do think I may have found the problem though. I was attempting to run my motor tuning pulse rates (step &...

I will re-check alighnment and for any dirt that may be present again. On some programs, if I watch for the hesitation on the initial z move and it doesn't get out of sinc with the DRO, the thing...

Thanks Jeff. Yes I have checked and everything seems to be working freely. Nothing loose on the ball screw, no couplings broken or loose.

Picked up a 3020T from inlaws using mach 3. Everything seems to be working fine except z axis movement. Using calibration on axis movement and dial indicator it is usually within .001-.002 on .100" ...