Mechanical damper for disk drives having band drive actuators

Details Mechanical damper for disk drives having band drive actuators Mechanical damper for disk drives having band drive actuators

1983-05-09

1986-07-01

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

74574, 369247, 360106, G11B 1700, G11B 5012

Patent

active

045983283

ABSTRACT:
To damp a stepper motor powered band drive for a disk drive, there is a relatively inexpensive, but efficient mechanical damper comprising a predetermined inertial mass which is concentrically coupled to the capstan of the band drive by an energy absorbing elastomer. The mass, its geometry, and the energy absorbing characteristics of the elastomer are selected to apply a dynamic force to the stepper motor which opposes and counteracts any unwanted oscillation of the stepper motor as the read/write head of the disk drive arrives at a selected data track. This damper is relatively free of potential contaminants and is, therefore, particularly attractive for Winchester disk drives.

REFERENCES:
patent: 3545301 (1970-12-01), Richter
patent: 3670593 (1972-06-01), Troyer
patent: 3901101 (1975-08-01), McGavern
patent: 4161004 (1979-07-01), Dalziel
patent: 4185309 (1980-01-01), Feldstein et al.
patent: 4307627 (1981-12-01), Sullivan
E. E. Zimmermann, "Torsional Vibration Damper", IBM TDB, Nov. 1981, vol. 24, No. 6, p. 3088.
Kordik, Kenneth S., "Reducing Overshoot and Oscillation in Variable Reluctance Step Motors", Proceedings, Ninth Annual Symposium on Incremental Motion Control Systems and Devices, University of Illinois, Jun. 2-5, 1980, pp. 65-78.

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