Method and apparatus for positioning head on reference track of

Details Method and apparatus for positioning head on reference track of Method and apparatus for positioning head on reference track of

1992-04-30

1994-05-24

Look, Edward K.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

318369, 318466, G11B 2108

Patent

active

053154584

ABSTRACT:
A head is moved toward an IGB1 at high speed until the IGB1 is detected, and then the head is moved toward an IGB2 at low speed until the IGB2 is detected. After the IGB2 is detected, a gradually increasing inverted drive current is fed to a VCM moving the head until an inversion of a direction of movement of the head is detected. After the IGB1 is not detected, a position control of the head is performed to position the head on a reference track. Rapid positioning of the head is attained even though an external force acting on a head actuator carrying the head varies.

REFERENCES:
patent: 3132855 (1992-07-01), Waugh et al.
patent: 3798427 (1974-03-01), Conners
patent: 4651073 (1987-03-01), Shimizu et al.
patent: 4796112 (1989-01-01), Mizukami et al.
patent: 4937689 (1990-06-01), Seaver et al.
patent: 5003415 (1991-03-01), Freeze
patent: 5050146 (1991-09-01), Richgels et al.

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