Optical disk drive device for positioning a carriage to a retrac

Details Optical disk drive device for positioning a carriage to a retrac Optical disk drive device for positioning a carriage to a retrac

1988-03-24

1989-12-12

Richardson, Robert L.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

360 7804, 360 721, 360 7814, 369 41, G11B 700, G11B 2108

Patent

active

048872547

ABSTRACT:
A retract device includes a signal instruction circuit for providing the number of tracks to be traversed, the access start instruction, and the retract instruction and the reference voltage generating circuit responsive to these instructions to provide the residual track number and the carriage moving signal and operates such that, immediately before the drive device is to stop operating a carriage having an optical head mounted thereon is moved by an access operation from a track to a first predetermined position according to the access start instruction, and is then moved from the first predetermined position to a second predetermined position according to the retract instruction at a predetermined reference speed.

REFERENCES:
patent: 4611315 (1986-09-01), Ogino
patent: 4698702 (1987-10-01), Miyake

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