Machining, Measurement, and Control Laboratory

A Method to Calibrate Kinematic Parameters of Parallel Mechanism Machining Center
Tetsuya Matsushita (Okuma Corp.)
Soichi Ibaraki (Kyoto University)

To make Parallel Kinematics Mechanism Machine Tool accurate, the calibration of kinematic parameters is needed. A method to calibrate kinematic parameters with DBB (Double Ball Bar) was proposed. However this method does not calibrate kinematic parameters for table of the machine, and rotations of the calibrated coordinate with measurements for table are needed. Therefore this method needs a long time to do, and it is required to shorten them. This paper presents a new method of calibration with a special jig that consists of Ball Plate with 7 ball and Stoppers to table. With this jig, the calibration for table is not needed, and the time for the calibration is shortened.
Key Words: Parallel Mechanism, Kinematic Parameter, Calibration, Double Ball Bar