Machining, Measurement, and Control Laboratory

A Stick Motion Compensation System with a Dynamic Model
Y. Suzuki (Yamazaki Mazak Corp.)
A. Matsubara (Kyoto University)
Y. Kakino (Kyoto University)
K. Tsutsui (Mitsubishi Electric Corp.)

This paper deals with a stick motion compensation system. Stick motion damages extremely the accuracy and the quality of workpieces in circular motions or on free form surfaces. In the conventional compensation system, it needed to tune parameters for each combination of radius and feed rate. This research proposes a new stick motion compensation system. The new system has a dynamic model that simulates the friction. The simulated friction consists of two components. One is spring resistance in proportion to a reverse distance from quadrant change. The other is viscous damping friction in proportion to velocity. The system can compensate stick motions suitably for wide range conditions of radii and feed rate.

Key words: Machine tools, stick motion, compensation, dynamic model.