Adaptive head positioning servo-mechanism

Details Adaptive head positioning servo-mechanism Adaptive head positioning servo-mechanism

1987-06-18

1991-03-26

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7704, 360 7812, 369 32, 369 4432, 318561, 318632, G11B 2108, G05D 23275

Patent

active

050034154

ABSTRACT:
A servo system for compensating for environmental forces acting on, for example, a disk drive. A circuit is provided for causing an electrical current to flow in the voice coil controlling a read/write head; the head is caused to seek a predetermined track; and a device adjusts the current delivered to the voice coil so that the force generated thereby at least approximately balances environmental forces acting upon the voice coil so that the read/write head does not move by more than a predetermined amount from said predetermined track.

REFERENCES:
patent: 4166970 (1979-09-01), Cardot et al.
patent: 4270073 (1981-05-01), Harman
patent: 4371960 (1983-01-01), Kroiss
patent: 4566046 (1986-01-01), Fujiki et al.
patent: 4697213 (1987-09-01), Kitamura
patent: 4698796 (1987-10-01), Kimura
patent: 4724370 (1988-02-01), Moraru et al.

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