Rotary disc drive actuator utilizing plural axially spaced and p

Details Rotary disc drive actuator utilizing plural axially spaced and p Rotary disc drive actuator utilizing plural axially spaced and p

1998-07-01

1999-11-23

Evans, Jefferson

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

G11B 554

Patent

active

059911247

ABSTRACT:
An improved rotary actuator for supporting heads relative to a disc of a disc drive for operation. The rotary actuator includes an actuator block pivotally connected to a chassis of a disc drive. The actuator block includes an actuator arm for supporting heads. The actuator block supports a coil assembly adapted for operation in a magnetic field to form a voice coil motor. The coil assembly includes a plurality of wound coils supported by the actuator block at spaced elevations and having a portion of spaced coils overlapped to reduce the operating area for the voice coil motor. The geometry of the coils reduces off-track force excitation of the rigid body resonance to allow for high bandwidth servo. The coil assembly also reduces off-track force during settle in for improved seek times.

REFERENCES:
patent: 5319512 (1994-06-01), Grapenthin
patent: 5448437 (1995-09-01), Katahara
patent: 5761007 (1998-06-01), Price et al.
patent: 5764441 (1998-06-01), Aruga et al.
patent: 5768061 (1998-06-01), Casey et al.

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