Patent ID: 6469863
Filing Date: 2002-10-22
Classification: F16C,G11B

Abstract:
A disc drive comprising:a recordable disc upon which a plurality of tracks are radially defined; a moveable actuator which supports a transducer adjacent the disc; a stationary active magnetic bearing assembly adjacent the actuator comprising a plurality of bearing coils configured to levitate the actuator along first, second and third orthogonal axes so that the actuator rotates about the first axis to move the transducer in a plane defined by the second and third axes; an active magnetic bearing control circuit, coupled to the active magnetic bearing assembly, which applies currents to the bearing coils to levitate the actuator; an actuator motor coupled to the actuator; and a servo control circuit which applies current to the actuator motor to position the transducer in relation to servo signals generated as the transducer reads servo data stored on the disc.