Patent ID: 7191535
Filing Date: 2007-03-20
Classification: G01B

Abstract:
1. A method of calibrating an electronic touch probe for the on-machine measurement of selected features of a workpiece in a lathe rotary table, which measures dimensions by the c-axis rotation of the table, comprising the steps of: locating the workpiece on the table at a first known radial position with respect to said c-axis, said workpiece having selected features of desired dimensions; locating an artifact having selected features with known dimensions, on the table at a second known radial position with respect to said c-axis; using the touch probe to contact the surfaces related to said artifact selected features, measuring the nominal dimensions thereof; comparing said nominal dimensions with said known dimensions to obtain a sum of errors; measuring said workpiece selected features to obtain the nominal dimensions thereof; and applying said sum of errors to said workpiece nominal dimensions to obtain the actual dimensions thereof.