抄録
Quadrant glitches are one of the causes debased the machining accuracy in NC machine tools because those leave streaky marks on the machined surfaces. In this study, a compensation method of quadrant glitch by using friction force estimated from command values is proposed. When the circular trajectories are precisely observed, it is found that the amount of the preload in the ball screw affect the height and shape of quadrant glitch curves at low feed speed. In this study, a method for compensating two peaks observed in quadrant glitch curves due to the change of contact points between balls and groove of a ball screw is proposed. It is confirmed that the developed compensator can decrease the quadrant glitch in a wide feed speed range through simulation and experiment. Thus, the proposed compensator can correct the quadrant glitches in high accuracy.
