Exact position control of a relative position between a magnetic

Details Exact position control of a relative position between a magnetic Exact position control of a relative position between a magnetic

1988-07-15

1991-10-01

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7702, G11B 5596

Patent

active

050538993

ABSTRACT:
For controlling a relative position between a magnetic head (15) and a recording medium (10) having a control area (14) indicative of a tracking axis for the magnetic head, a position controlling unit comprises a producing arrangement (28) for producing a position signal, and a control arrangement (29) for controlling the relative position in response to the position signal in a predetermined direction which intersects the tracking axis. More particularly, the producing arrangement comprises a first producing, a second producing, and a processing arrangements (31, 32, 33). Responsive to the detection signal, the first producing arrangement produces a first signal. The processing arrangement processes the first signal into a second signal. Responsive to the first and the second signals, the second producing arrangement produces the position signal. Preferably, the control area has a main area (17) indicative of the tracking axis, and a supplementary area (18) preceding the main area. The magnetic head is for detecting the main and the supplementary areas to produce a main and a supplementary detection signal which collectively serves as the detection signal.

REFERENCES:
patent: 4188646 (1980-02-01), Sordello et al.
patent: 4424543 (1984-01-01), Lewis et al.
patent: 4843493 (1989-06-01), Furuhata et al.

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