I have a problem with my x axis. I can do a G90 G01 X5.0 Y5.0 and then a X0 Y0 and the x axis does not return to where it started. It does it in feedrate and rapid. The DRO says it is where it is supposed to be. It loses about .10 for each move. Any ideas of what to check?? :)
-rob

What happens if you step it? Are you losing anything thay way? What feedrate are you using?
To lose exactlly .100 inches per move indicates a logic issue assuming that you are going in the same direction.

George