Compensation for dimensional changes in a record medium

Details Compensation for dimensional changes in a record medium Compensation for dimensional changes in a record medium

1982-06-23

1984-06-19

Stellar, George G.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

318561, 318634, 318652, G11B 2108, G11B 555

Patent

active

044555830

ABSTRACT:
A track positioning apparatus for a (floppy) disk record medium to compensate for physical changes in the disk resulting from variations in temperature or humidity. A grating, used to position a read-write head, includes reference marks thereon corresponding to reference tracks on the disk. The grating is stretched or compressed proportionally during a calibration operation to compensate for changes in the flexible disk.

REFERENCES:
patent: 3720930 (1973-03-01), Elsing
patent: 3731292 (1973-05-01), Kelley
patent: 3815150 (1974-06-01), Stoddard et al.
patent: 3863266 (1975-01-01), Hoshino
patent: 3951264 (1976-04-01), Heidecker et al.
patent: 3959823 (1976-05-01), Heidecker et al.
patent: 4348624 (1982-09-01), Anderson et al.

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