Head positioning using a disk drive mounted to a rotating table

Details Head positioning using a disk drive mounted to a rotating table Head positioning using a disk drive mounted to a rotating table

1995-08-27

1996-10-22

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7703, 360106, C11B 5596

Patent

active

055683371

ABSTRACT:
A device for detecting the position of an information recording or reproducing head relative to a recording medium; the head is relatively rotatable around a first axis with respect to the recording medium, and rotatable around a second axis parallel to the first axis. The device includes an autocollimator for measuring a relative positional relationship of the head substantially along the direction of the rotation around the second axis, a rotating table on which either the combination of the recording medium and the head or the autocollimator is mounted to activate the rotational movement substantially around the second axis, and a control unit. The control unit rotates the rotating table in response to the obtained position of the head with respect to the recording medium. According to the measurement result by the autocollimator, the control unit accomplishes a relative positional controlling in which a relative positional relationship between the autocollimator and the head is kept constant. As a result, a compact and high-accuracy head positioning device is achieved.

REFERENCES:
patent: 4980783 (1990-12-01), Moir et al.
patent: 5000572 (1991-03-01), Nose et al.
patent: 5162955 (1992-11-01), Burdenko
patent: 5268801 (1993-12-01), Hazel et al.
patent: 5325349 (1994-06-01), Taniguchi
Patent Abstracts of Japan, Kokai No. 62-234280, vol. 12, No. 102, Apr. 1988 .

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