I think Karl may have hit on the over current issue. The acceleration might be a bit high. On the other hand, I understand that hard acceleration makes for better cuts in a plasma system, so beefing up the drives might be a worthwhile endeavor.

I don't know what control you have from CamSoft, Karl is the expert there. But in the Galil you control the Acceleration and Deceleration with the ACn And DCn commands, where n = the axis letter.