Head position controlling circuit for disk unit including servo

Details Head position controlling circuit for disk unit including servo Head position controlling circuit for disk unit including servo

1988-12-23

1991-10-01

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 61, 360 7704, 360 7804, G11B 5596, G11B 2110

Patent

active

050538977

ABSTRACT:
A head position controlling circuit for a disk unit, which includes a timer for enabling periodical detection of differences of respective heads from a reference position, a memory for storing the detected differences, a reference head selected from the heads, and a device for reading the differences from the memory when a certain head is specified for access and computing a difference between differences of the specified head and the reference head for making correction to the head position.

REFERENCES:
patent: 4068267 (1978-01-01), Inouye
patent: 4371960 (1983-02-01), Kroiss
patent: 4700244 (1987-10-01), Fasen et al.
IBM TDB, vol. 17, No. 6, "Correction of Data Track Misregistration in Servo Controlled Disk Files", Paton, 11/74, pp. 1781-1783.

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