Disk apparatus including notifying of cleaning timing and contro

Details Disk apparatus including notifying of cleaning timing and contro Disk apparatus including notifying of cleaning timing and contro

1993-08-24

1995-11-28

Wolff, John H.

Dynamic information storage or retrieval

With stylus cleaning or treatment

G11B 358

Patent

active

054714516

ABSTRACT:
An apparatus for reading at least information by projecting a light beam from an optical head onto an optical disk rotated by a spindle motor. The rotation time of the spindle motor is measured, and upon reaching of a predetermined time, a cleaning request signal is sent to an upper order system. The rotation time of the spindle motor is counted by counting pulses generated with the rotation with a first counter stored in the RAM. Upon reaching of a predetermined value by the count of the first counter, a second counter stored in a non-volatile memory is updated. Upon reaching of a predetermined value by the second counter, a cleaning request is sent to the upper order system for display on a CRT, and a cleaning request flag in a non-volatile memory is set. When the end of cleaning of the apparatus is recognized, the cleaning request flag in the non-volatile memory is cleared.

REFERENCES:
patent: 5088082 (1992-02-01), Yamada et al.

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