Good one Hood. I reversed the motor leads on the z-axis and it works correctly. Leads are also reversed on x, so I'll try that next. Y is connected correctly, but the y-direction on the mill seems to be mechanically locked and I cannot find any handle, etc that frees it up. It's a Rong Fu RF-45. Unfortunately I don't have a manual for it and can't find one on the net.
thanks, rex