Method for reducing the rotation speed of an automatic ball balancing system of an optical disk reading device

摘要

An automatic ball balancing system for an optical disk reading device has a rotor mechanism that has a concave annular track formed on the rotor, with at least one ball placed on the annular track to perform automatic balancing. A surface with a low friction coefficient is also provided on the annular track in the gravity direction of the balls to reduce the movement resistance between the ball(s) and the annular track. In the meantime, the stable rotation speed of the rotor and the system phase angle of the ball(s) when the rotor reaches a stable rotation speed are also changed. One way of effecting this change is to bond or coat a material with a low friction coefficient on the annular track in the gravity direction of the balls. In this way, the balancing effect of the automatic ball balancing system can be improved.