Canon J1 Service Manual page 32

2
Technology > Processing Tray Unit > Basic Operation > Stack Job Offset
The stack is ejected each time three large size sheets*1 or five small size sheets*2 are offset
on the processing tray.
The swing motor turns and the swing guide descends.
This causes the upper/lower stack delivery rollers to hold the stack.
The stack delivery motor turns the stack delivery roller and return roller. At the same time, the
rear end assist guide is started by the rear end assist motor and the stack held by the stack
delivery rollers is delivered in the ejection direction.
The rear end assist guide stops once it reaches the prescribed position and returns to home
position when the rear end assist motor is reversed.
Then the stack delivery motor starts and ejects the stack with the upper/lower stack delivery
rollers.
Stack ejection roller
2
Technology > Processing Tray Unit > Basic Operation > Stack Job Offset
Swing guide
Return roller
Rear end
assist guide
F-2-24
■ Stack Job Offset
Job offset operation offsets paper stack to the front or rear when ejecting to sort the paper
stack.
The forward/backward movement of the copy delivered to the processing tray is controlled by
the front aligning plate and rear aligning plate.
The aligned copies are stapled or ejected according to the signal from the host machine.
When the power is turned on, the finisher controller PCB drives the aligning plate front
motor (M103) and aligning plate rear motor (M104) to return the two aligning plates to home
position.
The name and function of motors and sensors used by the stack job offset function are shown
below.
Rear aligning plate
home position sensor (PI107)
Light-shielding plate
Front aligning plate
home position sensor (PI106)
Aligning plate
(front)
(FRONT)
Light-shielding plate
Each sheet is pulled forward or backward using the front aligning plate and the rear aligning
plate.
The offset operation is performed each time a sheet is pulled onto the processing tray.
2-15
Aaligning plate
(rear)
Paper
Rear aligning plate motor (M104)）
Front aligning plate motor (M103)
F-2-25
2-15