Machining, Measurement, and Control Laboratory

Analysis of Motion Error of CNC Machine Tools (1st Report) -- Analysis of Motion Error at the Corner --
Atsushi Matsubara, Takashi Hatozaki, Soichi Ibaraki

This paper deals with the analysis for motion errors of the XY table of NC machine tools. When the table moves along corners, the overshoot or undershoot occurs due to the several mechanical and control factors. In order to clarify the mechanism, the simulation model of feedforward and feedback control block as well as mechanical block is used. By comparing the simulated and measured motion trajectory on an existing machine, it was found that the simulation could predict the motion errors at the corner, which can be interpreted into servo errors and machanical errors.