Patent ID: 6320720
Filing Date: 2001-11-20
Classification: G11B

Abstract:
A head-positioning system having comprising:a head-positioning mechanism including:a slider holding a read/write head;a slider supporting spring for supporting the slider;a carriage fixed to a carriage supporting shaft for rotating the slider supporting spring which is set rotatably to the carriage;a fine tracking actuator for driving the slider supporting spring in a rotational direction relative to the carriage; anda main actuator for rotating the carriage supporting shaft around a center axis of the carriage supporting shaft; anda head-position control circuit performing the functions of:obtaining deviation information of the read/write head relative to a designated position from positional information defect by the read/write head;generating a positioning correcting signal for feedback-controlling the fine tracking actuator to drive the slider supporting spring with a torque value to make the read/write head follow the designated position, according to the deviation information; andforward-controlling the main actuator to maintain an angular position of the carriage to be fixed when the slider supporting spring is driven by the fine tracking actuator.