Head seeking control apparatus with changeable speed references

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system

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Details

369 4425, 360 7806, 360 7807, G11B 700

Patent

active

054065356

ABSTRACT:
A head control apparatus of the invention includes a moving unit for moving an optical head to a given information track on an optical disk having concentric information tracks, a detector for detecting a direction of movement of the optical head from the a signal reproduced from the optical head, and a controller that, when the detector has detected the direction of movement of the optical head, controls the moving unit so that the optical head may move to a specified information track at a first speed, and that, when the detector has not detected the direction of movement the optical head, controls the moving unit so that the optical head may move to a specified information track at a second speed slower than the first speed.

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