Input/output communication between autochanger and drive

Details Input/output communication between autochanger and drive Input/output communication between autochanger and drive

1994-06-01

1995-06-27

Levy, Stuart S.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 19, 369 34, G11B 1906, G11B 1908

Patent

active

054285879

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 two motors of the two control systems, and current or voltage feedback from the motors, for all positioning, and for detecting the location of the mechanisms during, and at the end of, moves. An optical drive interface connects the electronics of the autochanger and the optical drive, and includes electrical signals to emulate an eject pushbutton on the optical drive and an indicator lamp on the optical drive. The autochanger monitors the on and off state of the lamp signal as well as the duration of the on and off cycles to determine which operation is being performed by the optical drive. The autochanger uses the lamp signal and the eject signal to control all operations with the optical drive.

REFERENCES:
patent: 3582949 (1971-06-01), Forst
patent: 3872505 (1975-03-01), Hino et al.
patent: 4218115 (1980-08-01), Parker
patent: 4570188 (1986-02-01), Ichiyanagi
patent: 4789973 (1988-12-01), Mabuchi
patent: 4812922 (1989-03-01), Minoura et al.

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