Method for reducing the rotation speed of an automatic ball balancing system of an optical disk reading device
View Patent ↗A method for reducing the stable rotation speed of an automatic ball balancing system is used with an automatic ball balancing system that has a rotor that has an annular track, with at least one ball provided for rotation inside the track. First, an optimum rotation speed w s that is between the unstable critical rotation speed w c of a ball and a working rotation speed w is first determined. In the next step, the rotor is accelerated to the optimum rotation speed w s . Next, the acceleration of the rotor is reduced until the balls are stationary relative to the track, and then the rotor is accelerated to the working rotation speed w.
1. A method of balancing an automatic ball balancing system in an optical disk reading device, the automatic ball balancing system having a rotor that has an annular track, with at least one ball provided for rotation inside the track, the method comprising:
determining an optimum rotation speed w s that is between the unstable critical rotation speed w c of a ball and a working rotation speed w;
accelerating the rotor at a first acceleration until the rotor reaches the optimum rotation speed w s ;
rotating the rotor at a second acceleration, which is different from the first acceleration, until the balls are stationary relative to the track; and
accelerating the rotor at a third acceleration until the rotor reaches the working rotation speed w.
2. The method of claim 1 , wherein the second acceleration is zero.
3. The method of claim 1 , wherein the second acceleration is less than the first acceleration.
4. The method of claim 1 , wherein the third acceleration is less than the first acceleration.
5. The method of claim 1 , wherein the third acceleration is different from the first and second accelerations.
6. A method of balancing an automatic ball balancing system in an optical disk reading device, the automatic ball balancing system having a rotor that has an annular track, with at least one ball provided for rotation inside the track, the method comprising:
determining an optimum rotation speed w s that is between the unstable critical rotation speed w c of a ball and a working rotation speed w;
accelerating the rotor at a first acceleration until the rotor reaches the optimum rotation speed w s ;
rotating the rotor at a second acceleration, which is less than the first acceleration, until the balls are stationary relative to the track; and
accelerating the rotor at a third acceleration until the rotor reaches the working rotation speed w.
7. The method of claim 6 , wherein the third acceleration is different from the first and second accelerations.