130
v Drum Driving Section
chap.2
(1) Home Position / Jam Detection
Position Sensor
2. Function of Parts
The home position / jam detection position sensor detects the drum home position and jam detection position.
2The drum home position is the position where the drum stops at the same time when a beep sounds after
the jog switch (drum rotation switch) is kept pressing.
2The jam detection position is the timing to check paper jamming in the paper ejection section.
2Paper jamming in the paper ejection section is checked in the above timing with the jam sensor (photo-
receiving) and P roll sensor.
Operation
The home position / jam detection position sensor is positioned while the drum is rotating as follows:-
2The home position is detected with the edge of photointerrupting / photopassing.
2The jam detection position is detected with the edge of photopassing / photointerrupting.
Circuit
Drum home / jam detection position sensor
Home position detection edge
Jam detection position edge
Photointerrupting plate
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