Constraction Of The Control System - Canon Finisher-T1 Service Manual

Chapter 2

2.2.2 Constraction of the Control System

The copy sent from the host machine is delivered to the ejection tray, escape tray, or
processing tray according to the ejection type. Job offset or stapling is performed,
according to the instruction from the host machine, for copy delivered to the staple tray.
When ejecting from the processing tray, rear end assist guide is used in addition to the stack
ejection roller to eject the stack.
The feed motor (M101), stack ejection motor (M102), rear end assist motor (M109), escape
feed motor (M112), and inlet motor (M113) are step motors. These motors are rotated
forward or backward by the microcomputer (CPU) in the finisher controller PCB.
The following three sensors are provided in the copy delivery path to detect the arrival or
passing of copies.
- Inlet sensor (PI103)
- Delivery path sensor (PI104)
- Escape tray path sensor (PI118)
Also, each ejection tray has sensors to detect the presence of copy on the tray.
First tray paper sensor (PI111)
Second tray paper sensor (PI112)
If the copy does not reaches or passes each sensor within prescribed time, the finisher
controller PCB determines that the jam has occurred and stops the operation. Then it
notifies the host machine that a jam has occurred. When all of the doors are closed after
fixing the jam, the finisher checks whether copy is detected by any of the above three
sensors (inlet sensor, delivery path sensor, escape tray path sensor). If any of the sensors
detects a copy, the finisher determines that the jam is not fixed and sends jam processing
signal to the host machine once more.
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