Device for detecting reference position of magnetic head

Details Device for detecting reference position of magnetic head Device for detecting reference position of magnetic head

1987-04-20

1989-05-09

Faber, Alan

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360106, 74665GA, G11B 554

Patent

active

048293946

ABSTRACT:
A device is disclosed for detecting a position of reference for the movement of a magnetic head when the magnetic head is moved by a driving force from a rotary driving source in the radial direction of a magnetic disc. A plurality of rotary members having speed reduction ratios different from each other are rotated by the rotary driving source, and a time, at which phases of these rotary members coincide with each other, is made to be the position of reference. Here, the speed reduction ratios of the plurality of rotary members are selected such that the phases of the plurality of rotary members coincide with each other only once during the movement of the magnetic head over the all of area of the magnetic recording.

REFERENCES:
patent: 3646261 (1972-02-01), Kinjo et al.
patent: 4313141 (1982-01-01), Yanagida et al.

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