Optical disk device eliminating offset of actuator and offset el

Details Optical disk device eliminating offset of actuator and offset el Optical disk device eliminating offset of actuator and offset el

1990-08-17

1993-02-23

McElheny, Jr., Donald

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4434, G11B 700

Patent

active

051896532

ABSTRACT:
An optical disk device for eliminating an offset of an actuator which controls a fine adjustment of a tracking control. In the device, during an offset measuring mode, an electric drive current of the actuator is changed and the drive current is stored and held when a detection output at a neutral position in a position detector of the actuator is obtained. Then, during a usual operation mode, the obtained offset current is constantly supplied as the drive current of the actuator, whereby a spring force is cancelled and an offset of the tracking error signal is eliminated.

REFERENCES:
patent: 4330880 (1982-05-01), Van Dijk
patent: 4589102 (1986-05-01), Volleau et al.
patent: 4634853 (1987-01-01), Kanamaru
patent: 4674076 (1987-06-01), Hsieh et al.
patent: 4718050 (1988-01-01), Kurz et al.
patent: 4768180 (1988-08-01), Janssen et al.
patent: 4769803 (1988-09-01), Yamamiya
patent: 5029150 (1991-07-01), Kiyoshi

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