Damped turntable/disk arculately positionable relative to a head

Details Damped turntable/disk arculately positionable relative to a head Damped turntable/disk arculately positionable relative to a head

1996-09-27

1998-08-25

Levy, Stuart S.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Specific detail of storage medium support or motion production

369248, 369263, 360 9909, G11B 2504, G11B 1920, G11B 1734

Patent

active

057989990

ABSTRACT:
A disk recording system for disks such as videodisks or compact disks has a turntable on which the disk is supported adjacent a recording head. A shaft defining the axis of rotation of the turntable rotates in a bearing and that bearing is itself movable about an axis defined by another shaft. The bearing of the shaft is an air bearing and there is a damper unit for damping that movement. There may be a sensor for detecting the rate of rotation of the shaft defining the axis of rotation of the turntable. The radial displacement of the head relative to the axis of the turntable may be determined on the basis of rotation of the other shaft, and the rotation of the turntable controlled on the basis of the product of signals representing the radial displacement and the rate of rotation of the shaft, respectively.

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