After homing, the right side is also ~2mm from the edge. However, after long carves (several hours), I find it offset. I went to Y=0 at the end of a carve and found it <1mm from the edge:
I’m not understanding how a few chips would cause this? Even if it got stuck, shouldn’t the closed loop either compensate for it or trigger an alarm? It moves very smoothly, I don’t get any jerkiness. It just accumulates some during the carve and I clean it off before the next carve.
I’d check the motor coupler on the offending y-rail. When I was calibrating my Elite Journeyman after upgrading it, I discovered that a Y-rail coupler was loose on the pre-installed side. Following that discovery, I went through and checked both sides of the couplers on ALL axes.