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x Platemaking / Master Feed / Ejection Section
chap.2
1. Master Setting Error Detection
Operation
In platemaking, the end mark sensor uses amount of reflected light to detect presence or absence of a master
on the transfer path. Then the following displays and operations are performed:
2When a master setting error is detected, "MASTER SETTING ERROR" is displayed and printing is not
processed.
2"MASTER SETTING ERROR" is only cleared by opening and closing the master cover.
(It is not cleared by turning the power off.)
2Printing is not performed but platemaking is only performed when the display is cleared after "MASTER
SETTING ERROR" is displayed. (Because the master is not attached to the drum.)
Timing
(1) While platemaking is being processed, the reflection light amount does not turn to be in a white level.
(Master detection sensor)
(2)
When platemaking process is finished (before printing process), the reflection light amount is in a white level.
Timing
When it is considered that the end mark is read under the following conditions, "CHANGE MASTER" is
displayed.
q While the master is rolling up to the drum during platemaking, the following is checked.
w When the master passes under the end mark sensor, the amount of reflected light is read.
e If the following conditions are met, it is considered as master end.
Maximum Minimum 20 and Maximum white level top limit
2. Master End Detection
Operation
The end mark is printed on the area about 1 m from the end of the master.
2When the end mark is detected, "CHANGE MASTER" is displayed.
2When "CHANGE MASTER" is displayed, plate-making is not performed next.
(The display is not cleared by turning the power off.)
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