Adaptive micro-actuated head gimbal assembly

Details Adaptive micro-actuated head gimbal assembly Adaptive micro-actuated head gimbal assembly

1997-05-15

1998-08-18

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360109, G11B 555, G11B 556

Patent

active

057965587

ABSTRACT:
A disk drive has a head stack assembly with head arms which extend between adjacent magnetic disks. Each head arm includes head gimbal assemblies. The head arm is capable of pivoting about a first axis of rotation for providing the head gimbal assembly with a macro-actuation movement relative to a selected track on a disk, and for positioning the head gimbal assembly in an initial position relative to the selected track. A micro-actuator is connected to the head gimbal assembly so that the head gimbal assembly is pivotally secured to the head arm about a second axis independently of the pivotal movement of the head arm. This provides the head gimbal assembly with a micro-actuation movement relative to the selected track, such that if there is skew between the head gimbal assembly and the track, a micro-actuator provides correction to minimize the skew angle. Also the micro-actuator provides cancellation of transient and harmonic vibrations.

REFERENCES:
patent: 4764829 (1988-08-01), Makino
patent: 5189578 (1993-02-01), Mori et al.
patent: 5216559 (1993-06-01), Springer
patent: 5303105 (1994-04-01), Jorgenson
patent: 5521778 (1996-05-01), Boutaghou et al.

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