Irving,

Let me be sure I understand. You want the thread pitch (angle of the face of the thread) for the short axis on my machine? I have gotten the calibration under control though and down to .05mm repeatable tolerances. Which is good enough for now. I cut off a bit of the X axis as it was butting against the axle of the nema motor when mounted in properly. So that is fixed and is now running very well.

Michael