Head positioning mechanism for magnetic disc memory device

Details Head positioning mechanism for magnetic disc memory device Head positioning mechanism for magnetic disc memory device

1981-03-24

1983-12-27

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360109, G11B 548, G11B 554

Patent

active

044234473

ABSTRACT:
A magnetic head positioning mechanism positions a magnetic head carried on a carriage at a specific location on a magnetic disc through the movement of a belt mounted to a motor spindle of a step motor. The magnetic head positioning mechanism pulls one end of a belt of which the other end is wound or unwound around a motor pulley, thereby to constantly apply a rotation torque and thereby to eliminate an adverse effect by a dead zone due to the hysteresis phenomenon of the step motor. Alternatively, the rotation torque is always applied to the step motor by pulling the carriage in an access direction, thereby to improve the positioning accuracy of the head.

REFERENCES:
patent: 3859662 (1975-01-01), Habich
patent: 3881189 (1975-04-01), Mayeda
patent: 4161004 (1979-07-01), Dalziel
patent: 4163996 (1979-08-01), Kaseta et al.
IBM TDB, E. L. Bailey, Idler System for Transducer Supporting Band, vol. 17, No. 11, Apr. 1975, pp. 3426-3427.
IBM TDB, D. S. Proper, Accurately Positioning Transducers to Rotating Disks, vol. 18, No. 7, Dec. 1975, p. 2066.
IBM TDB, D. S. Proper, in situ Sero Track Recording for a Record Storage Disk, vol. 20, No. 7, Dec. 1977, pp. 2074-2075.
IBM TDB, T. R. Fournier, Dual-Band Access Mechanism, vol. 19, No. 7, Dec. 1976, pp. 2675-2677.

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