Self-calibration method for 2.5-dimensional on-machine measurement of workpiece geometry

Abstract

This paper proposes a self-calibration method for 2.5-dimensional measurement of workpiece geometry performed on five-axis machine tools. The objective of the proposed method is to identify the geometry of a workpiece in the vertical Z-direction by on-machine measurement using a touch-trigger probe, when the machine tool has unknown error motions in the Z-direction. The part shape error determined by the proposed method is compared with a CMM measurement.