Help! I have been working on this machine for over 6 weeks and we cannot understand why we keep loosing position on all 3 axis. Today i reset all 3 zero positions for X, Z and B (rotary head). I ran one dry cycle, and my X zero position changed by : -.00081, the Z: +.00159 and the B by .002 degrees. We have replaced the Drive in the B-axis before we noticed all 3 axis moving. We have replaced the SDU module, and a new power supply. Can anyone think of a reason for all 3 axis to be loosing position? If we leave indicators set up on machine, after a few hours you can see the axis move, but not consistantly. Sometimes +, sometime - . Was leaning towards some sort of electrical noise or grounding problem. Anyone ever experienced this before? Thanks for any help!