Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1994-04-29
1995-12-12
Epps, Georgia Y.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 4429, 369 4434, 369 4435, 260 7806, G11B 709
Patent
active
054756634
ABSTRACT:
An information recording/reproducing apparatus is provided with a velocity control device for moving a recording and/or reproducing head from a current track to a target track under velocity control. A target velocity for the head is determined and the moving velocity of the head is detected by a detector. An instruction value for an actuator for moving the head is generated at every predetermined calculating interval on the basis of the target velocity and the detected velocity so that the head follows the target velocity. In the generation of the instruction value for the actuator for the head, the calculating interval can be switched into plural values by a switching device until the head reaches the target track.
REFERENCES:
patent: 4524398 (1985-06-01), Fujiki
patent: 4677507 (1987-06-01), Elliott
patent: 4719610 (1988-01-01), Bates et al.
patent: 5072434 (1991-12-01), Uchikoshi et al.
patent: 5077716 (1991-12-01), Takeda et al.
patent: 5146440 (1992-09-01), Yamauchi et al.
Mizoshita, et al., "Head-Positioning Servo Design for Disk Drives," Fujitsu-Sci. Tech. Jour., vol. 18, No. 1, Mar. 1982, pp. 101 through 115.
Canon Kabushiki Kaisha
Edun Muhammad N.
Epps Georgia Y.
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