Working with a new Thunder Laser w/ Ruida controller trying to calibrate steps/rev under tightly controlled conditions, I discovered that if you frame a rectangle about the height size of the circumference of the object, the origin doesn’t return exactly to the starting point. Without touching anything, a few more framing operations reveals that the origin drifts. Steps/rev, diameters of drive wheels, etc. have no effect on remedying this issue. It should be noted that the object is a perfect cylinder, no tapers. The rotary device is new, solid, nothing appears to be slipping or unusual noises. The belt drive and pulleys are ribbed.
Any help with this issue would be most appreciated.