Servo control method for an opto-magnetic disc

Details Servo control method for an opto-magnetic disc Servo control method for an opto-magnetic disc

1996-12-17

1998-04-14

Tran, Thang V.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4426, 369 58, 369 54, G11B 709

Patent

active

057401373

ABSTRACT:
A servo control method and an apparatus for an opto-magnetic disc swiftly converts a servo control system corresponding to a changed area when a current servo area is abruptly changed while executing a servo control operation related to a specific area of the opto-magnetic disc by an optional servo system. A control section periodically detects that the current servo area is changed to a different are due to an external shock or excessive tracking operation while executing the servo control operation, and converts the current servo system into the servo system relevant to the changed area. Thus, the time required to resume the servo control operation is reduced when the servo area is abruptly changed during the servo operation by a servo control apparatus.

REFERENCES:
patent: 4761692 (1988-08-01), Yoshida et al.
patent: 5233584 (1993-08-01), Kulakowski et al.
patent: 5268883 (1993-12-01), Yamaguchi et al.

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