Abstract
This paper deals with the analysis for motion error 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 mechanical errors.
