Patent ID: 8107210
Filing Date: 2012-01-31
Classification: G11B

Abstract:
1. A control method of a magnetic actuator system having a light intercepting element, a magnetic actuator, a position sensor and a limiting element, comprising the steps in sequence of: an initial step to define two end points corresponding to the operative range of the magnetic actuator, comprising: moving the magnetic actuator to a first position in accordance with a first position signal corresponding to one of the end points such that the light intercepting element contacts one side of the limiting element; generating a first position sense signal by the position sensor while the light intercepting element contacts one side of the limiting element; storing the first position signal and the first position sense signal to a microprocessor; moving the magnetic actuator to a second position in accordance with a second position signal corresponding to the other one of the end points such that the light intercepting element contacts the other side of the limiting element; generating a second position sense signal by the position sensor while the light intercepting element contacts the other side of the limiting element; storing the second position signal and the second position sense signal to the microprocessor; an orientation step to perform an interpolation in accordance with the first position signal, the first position sense signal, the second position signal, the second position sense signal, and a target position signal so as to obtain a target position sense signal by the microprocessor; a moving step to move the magnetic actuator to an actual position in accordance with the target position signal; a sensing step to output an actual position sense signal in accordance with the actual position by the position sensor; and an adjustment step to move the magnetic actuator from the actual position to a target position in accordance with the comparison of the target position sense signal and the actual position sense signal.