Data transducer position control system for rotating disk data s

Details Data transducer position control system for rotating disk data s Data transducer position control system for rotating disk data s

1980-09-24

1983-08-02

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 78, 310 49R, G11B 2110, G11B 2108, H02K 3700

Patent

active

043969593

ABSTRACT:
An improved apparatus and method is disclosed for controlling the position of one moveable member relative to another. In the disclosed preferred embodiment of a rotating disk memory system, the moving member is a head carriage structure and the other is a frame carrying a rotating data storage disk. From externally supplied position selectron information, and from internally determined polyphase position information, open loop position changing movements are determined and carried out in accordance with monitored incremental polyphase position information generated during the movement. When a destination location has been reached one or more servo systems close loop in order to maintain the moving member precisely at the newly commanded location. A rotor for moving the member is an aspect of the present invention.

REFERENCES:
patent: 3691543 (1972-09-01), Mueller
patent: 3737883 (1973-06-01), Sordello et al.
patent: 3864741 (1975-02-01), Schwarz
patent: 4096534 (1978-06-01), Brownback et al.
patent: 4103314 (1978-07-01), Case
patent: 4135217 (1979-01-01), Jacques et al.
patent: 4188646 (1980-02-01), Sordello et al.
H. P. Stickel, "New 50-Megabyte Disk Drive: High Performance and Reliability from High Technology Design", Aug. 77 Hewlett Packard Journal, pp. 2-15.
Shugart Associates, "8-Inch Fixed Disk Drive", Two page product bulletin dated 9/79.

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