Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1989-03-20
1991-08-13
Fuller, Benjamin R.
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
369 58, 369 752, 369178, 369233, G11B 1722
Patent
active
050401599
ABSTRACT:
Disclosed is an optical disk handling system, called an autochanger, having two control systems to provide the six motions necessary to move optical disk cartridges from storage holding cells to an optical drive. The system uses shaft encoders on the motors of the two control systems, and current or votlage feedback from the motors, for all positioning, and for detecting the location of the mechanisms during and at the end of moves. The shaft encoders are used to position a mechanism close to the eventual move location, then motor current or voltage feedback is used to determine opposition to the movement to the mechanism, which informs the control system as to whether the mechanism has reached its destination. An important aspect of the invention is that the motor current or voltage feedback is used by one control system to provide five of the six motions.
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Bianchi Mark J.
Kato Rick A.
Methlie Jennifer L.
Oliver Thomas C.
Proehl Kraig A.
Fuller Benjamin R.
Gibson Randy W.
Hewlett--Packard Company
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