Scanning Spheres (Multiple sizes) for Roundness of .00005"

[[Ri...]]

I am trying to come up with a method to scan Spheres that could range from .100 to .750 (estimated range), these are ground and then lapped.

At both grind and lapped, they have to be .00005 max roundness.

Looking for speeds, filters, outliers, etc. Right now, I am using a Ø1mm stylus tip. In some cases, my results are on target with a RondCom or about .000001 to .000002 more than the Rondcom. The Rondcom typically gives results in the .00003+ to max (Its slow, cumbersome and easy for an "operator" to make a mistake, I need a better solution).

If any users have information that may be of help in this, please post, email or message me.