Disk apparatus

Details Disk apparatus Disk apparatus

1998-03-13

2000-08-15

Hindi, Nabil

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4425, 369 4432, 369 32, G11B 700

Patent

active

061046817

ABSTRACT:
In the disk apparatus of the present invention, a head unit records and/or reproduces information on the disk while the disk is rotating. An actuator activates a positioning of the head at target position of the disk. An error detection section detects an error signal between the target position and a position of the head unit activated by the actuator. A tracking compensation section outputs a driving signal of the actuator in order according to the error signal. A decision section decides whether an absolute value of a difference between the driving signals is above a threshold. A predetermined value output section outputs a predetermined value to compensate the driving signal if the absolute value of the difference is above the threshold. An actuator driving section drives the actuator according to the driving signal and the predetermined value.

REFERENCES:
patent: 4562562 (1985-12-01), Moriya et al.
patent: 4866690 (1989-09-01), Tamaru
patent: 5048001 (1991-09-01), Moriya et al.
patent: 5065383 (1991-11-01), Tateishi et al.
patent: 5398221 (1995-03-01), Ogawa
patent: 5475663 (1995-12-01), Ogino
patent: 5477513 (1995-12-01), Onodera et al.

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