Patent ID: 6424486
Filing Date: 2002-07-23
Classification: G11B

Abstract:
A disk drive apparatus, comprising:a disk supported for rotation about an axis, and having thereon a magnetic surface for storage of information; a member supported for movement relative to said disk and said axis; an actuator for effecting controlled movement of said member relative to said disk and said axis; a microactuator disposed on said member; a read/write head supported by said microactuator for controlled movement in conjunction with said member, movement of said member by said actuator corresponding to movement of said read/write head adjacent to and in a direction approximately radially of said magnetic surface of said disk from said axis, aid movement of said read/write head by said microactuator corresponding to movement of said read/write head adjacent to and in a direction approximately radially of said magnetic surface of said disk from said axis; a position detector for generating a position signal representative of the position of said read/write head relative to said surface of said disk; and a control system responsive to the position signal and to an input signal specifying a target position of said read/write head relative to said surface of said disk concurrently controlling said actuator and said microactuator to position said read/write head at the target position with respect to said surface of said disk; said control system including a first control system portion responsive to said input signal for generating a microactuator control signal to control said microactuator and a second control system portion receiving a control input from said first control system portion and from said microactuator for generating an actuator control signal to control said actuator.