Positioner seek control system of a disk apparatus and method fo

Details Positioner seek control system of a disk apparatus and method fo Positioner seek control system of a disk apparatus and method fo

1991-05-17

1993-11-02

Pascal, Robert J.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 4428, G11B 700

Patent

active

052589668

ABSTRACT:
A positioner seek control system of a disk apparatus for seeking a target track on a medium by controlling a positioner during a positioner seek control period includes a tracking actuator accelerating unit for accelerating the tracking actuator in a seeking direction during a first predetermined period from the start time of the positioner seek control period, and a locking controlling unit for enabling the actuator locking means for a second predetermined period after the acceleration by the tracking actuator accelerating unit is finished. The first predetermined period, the second predetermined period, and the acceleration by the tracking actuator are determined so that the vector sum of the velocity of the positioner and the velocity of the tracking actuator after enabling the actuator locking means is in the seeking direction of the positioner.

REFERENCES:
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patent: 4914725 (1990-04-01), Belser et al.
patent: 5003524 (1991-03-01), Ikeda
patent: 5033037 (1991-07-01), Yanagi
patent: 5038333 (1991-08-01), Chow et al.
patent: 5121370 (1992-06-01), Yanagi
Copending U.S. patent application Ser. No. 265,460 (Filing date: Oct. 11, 1989).
H. Inada et al., C&C Systems Research Laboratories, NEC Corp., Tracking Servo for Small Size Optical Disk System, Aug. 18, 1986 SPIE, vol. 695, pp. 130-131, Optical Mass Data Storage II, Bellingham, Wash., USA.
Robert P. Freese et al., Optical Mass Data Storage II, Aug. 18-22, 1986, vol. 695, pp. 132-137, San Diego, Calif.
IBM Technical Disclosure Bulletin, Using Fine Servo For Managing Track Seeking on Optical Disks, Jan. 1988, vol. 30, No. 8, pp. 128-130, New York, USA.

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