131
v Drum Driving Section
chap.2
(2) Master Attachment / Detachment
Position Sensor
The master attachment / detachment position sensor detects the drum stop position when the plate is
attached or detached. It also detects the speed reducing timing for stopping at the printing speed and for
pressing the
jog switch (drum rotation
switch
)
.
Operation
The following is the state of the master attachment / detachment position sensor while the drum is rotating.
2The master detachment position is detected with the edge of photopassing
f
photointerrupting.
2The master attachment position is detected with the edge of photointerrupting
f
potopassing.
2The drum speed is reduced to the slow (before-stop) speed at the plate detachment position before the drum
stops.
Circuit
Photointerrupting plate
Master detachment position edge
Master attachment position edge
Plate attachment / detachment
position sensor(PS6)
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