Job Offset - Canon FINISHER-C1 Service Manual

D.

Job Offset

1. Outline
In job offset mode, the first copy or the last copy is shifted to the front for delivery to the tray.
Other copies are delivered to the tray without a shift.
The copies are shifted by the alignment plate. The alignment plate is checked by the alignment
home position sensor (PI6) to find out whether it is in home position.
The finisher drive PCB drives the alignment plate motor (M3) at power-on to return the align-
ment plate to its home position.
The finisher controller PCB stops the delivery motor (M2) when the trailing edge of the copy
has moved past the feed roller 2. Then, the finisher controller PCB rotates the delivery motor coun-
terclockwise, thereby switching the gear assembly of the delivery motor to the swing guide mecha-
nism. As a result, the drive of the delivery motor is transmitted to the swing guide to move up the
guide. When the swing guide open sensor (PI18) detects the swing guide, the delivery motor stops,
and the swing guide is held in up position.
When the swing guide has moved up, the feed belts attached to the feed roller 2 move the copy
to the stapling tray. The presence of paper on the stapling tray is monitored by the stapling tray
paper sensor (PI4).
The finisher controller PCB drives the alignment motor (M3) in advance, and keeps the align-
ment plate in wait at a point 7 mm behind the trailing edge of a sheet. When the sheet is moved to
the stapling tray, the guide plate retaining solenoid (SL6) moves the guide plate away and under the
stapling tray. Thereafter, the alignment motor shifts the sheet to the front by 30 mm.
When the copy has been shifted, the finisher controller PCB rotates the alignment motor coun-
terclockwise to move the alignment plate to a point 7 mm behind the trailing edge of the sheet.
Thereafter, the delivery motor is rotated farther counterclockwise to move the swing guide
down. When the swing guide has moved down and turned on the swing guide open/closed detecting
switch 2 (MS6), the delivery motor rotates clockwise to deliver the sheet. The guide plate returns to
up position upon delivery of the sheet.
COPYRIGHT © 1998 CANON INC. FINISHER-C1/SADDLE FINISHER-C2 REV. 0 DEC. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 2 FINISHER UNIT BASIC OPERATION
2-19