Not sure but I assume I am losing steps. As I turned my motor tuning way down and got the same results, so I don't think I have a stepper stalling issue. If I run a square pattern, basically .010" off each side around a part for .250 or so whem I get done my zero has moved always in the same directions. Was about .100 but I turned off CV and set it for exact and now it's about .010". Any idea? Pulse width problem? I changed the active hi state of the step pins and it got worse so I put it back. Turned the motor down to a crawl and seems the same. I was just cutting 2 sides and was rapiding on the no cut sides, I change those to G1's and got the same results.
Don