Hi...hope someone can help...I have a problem with my 3 axis cnc router...
anytime the z axis goes up,followed by a postive direction move in xy at the same time (angle)..xy stalls and loses position..if z is moved down any amount the problem goes away.

I actually made a workaround for rapid travel by moving z down a smidge before any other motion.....problem is now I am  doing some ramp in and out and I am losing position

What make and model of stepper motor controller are you using ?
(a link or picture would be useful).

Tweakie.