44
x Platemaking / Master Feed / Ejection Section
chap.2
(3) Master top sensor
Description
The master top sensor is located at a fixed distance
relative to the master. By means of reflected light,
this sensor senses the presence of the master on the
master travel path.
If the photointerrupting condition (master not
present) is not obtained during platemaking,
"MASTER SET ERROR" is displayed.
Circuit
R8S02027
R8S02E09e
Master top sensor
Master
Operation
When there is no master, the sensor is in the state of photopassing(open). When master is placed inside, the
sensor is in the state of photointerrupting(close). When an absence of master is detected, the message "NO
MASTER" is displayed on the LCD panel.
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