On a cmm the probe can be calibrated around a reference ball in multiple directions to get the effective diameter of the stylus ball, this should be done whenever the stylus is changed.
This can also calibrate out the variation in different directions caused by the variation in contact force needed to break the contact, some probes have a contact force adjustment at the rear which forces the stylus downwards, while lightening the force reduces stylus bending it also makes the electrical contact less good so is a compromise. More modern probes use a force sensor to get around the kinematic design problem. Dave Caroline ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
