Track-following control system for magnetic disk drive

Details Track-following control system for magnetic disk drive Track-following control system for magnetic disk drive

1989-01-13

1990-12-11

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 77080, G11B 5596

Patent

active

049774700

ABSTRACT:
A track-following control system for a magnetic disk drive according to the present invention includes a magnetic disk, a magnetic head, a position error signal generator, a controller, and a stepping motor. One or more track position signals indicating a position of a track are recorded in the magnetic disk in numbers of sectors. The magnetic head writes and reads out normal data in and from the magnetic disk, and reads out the track position signal from the magnetic disk in the same manner. The position error signal generator generates a position error signal indicating a position error between the magnetic head and the track based on a track position signal. The controller calculates intra-sector errors by calculating an average position error of each sector and a desired number of estimated position errors of the corresponding sector by interpolation. Then, the controller produces, in numbers of the secotrs, position error signals having a larger number than that of the sectors by using a position error signal supplied from the position error signal generator. The stepping motor 18performs positioning of the magnetic head in accordance with the position error signals having the larger number than that of the sectors.

REFERENCES:
patent: 4412165 (1983-10-01), Case et al.
patent: 4530020 (1985-07-01), Sutton
patent: 4589037 (1986-05-01), Jen et al.

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