COMPUTING DEVICE AND METHOD OF COMPENSATING PRECISION OF MEASUREMENTS USING PROBES OF THREE-DIMENSIONAL MEASUREMENT MACHINES

摘要

In compensating precision of measurements using a probe of a measurement machine, a physical ball is provided. Surface of the physical ball is divided into horizontal slices. Points are selected on the slices, and coordinates and vectors of the points are computed. A rotating vector N3 is computed by cross-multiplying a vector N1 of a pole of the probe and a vector N2 of the physical ball, and a rotating matrix is generated by rotating the physical ball around the rotating vector N3. The coordinates in the reference point set are updated by multiplying the coordinates with the rotating matrix. A measuring program is generated according to the reference point set. The measurement machine measures points on the physical ball twice using the measuring program, to generate measuring point sets Refs and Meas. Compensation values for the probe are computed using the measuring point sets Refs and Meas.