Contura with Calypso and Rotary Table

[[To...]]

When scanning an outer diameter of a bearing ring without the rotary table (verticle probe head scan),   and performing the same scan with the rotary table, the center of the circle the the rotary table  is shifted in the X direction  +.026, and the Y direction with zero shift.    Calibrating the rotary table axis doesn't fix the problem.    Any advice is appreciated.   Thanks.  

[[Pa...]]

So there's the rotary table axis, but then there's the axis of rotation of your workpiece.  Have you measured the difference?

There are lots of ways to handle this.  Many folks use their base alignment.  My parts are all cylindrical so the following assumes yours are too.  You should be able to get from here to there if not.

I typically instruct the workpiece axis when rotated about the RT axis should measure less than .005" TIR, though you can probably tolerate more.  Stylus clearance is the big concern.

Probe an accessible feature with RT at 0°.

Rotate RT to 180°, probe the same feature again.

Use a symmetry of those two features as the spatial rotation and X/Y origin (I assume your RT axis is vertical).

Hope this helps!