Apparatus for positioning magnetic head to position correspondin

Details Apparatus for positioning magnetic head to position correspondin Apparatus for positioning magnetic head to position correspondin

1981-03-27

1983-07-19

Kilgore, Robert M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 722, 360106, G11B 2108, G11B 555, G11B 1700

Patent

active

043946968

ABSTRACT:
Apparatus for positioning a magnetic head at a position corresponding to a reference track for use in a magnetic tape apparatus, in which the magnetic head is moved by a stepper motor in a direction perpendicular to the running direction of a magnetic tape formed with a plurality of data tracks. A detector such as a microswitch for detecting the arrival of the magnetic head at the neighborhood of a position corresponding to the reference track is provided. A control circuit stops the stepper motor for stopping the magnetic head at the reference position in response to the excitation of a previously selected phase winding of the stepper motor after detection of the arrival of the magnetic head at the neighborhood of the position corresponding to the reference track by the detector.

REFERENCES:
patent: 3676609 (1972-07-01), Coyle
patent: 4313141 (1982-01-01), Yanagida
patent: 4315286 (1982-02-01), Copeland
patent: 4323935 (1982-04-01), Koizumi
patent: 4333116 (1982-06-01), Schoettle
Hall et al., "Self-Contained Magnetic Stripe Reader/Encoder", IBM Tech. Disc. Bull., vol. 20, No. 5, pp. 1879-1880, Oct. 1977.

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