Paper Feed Control - Canon SADDLE FINISHER K3 Service Manual

CHAPTER 2 OPERATION OVERVIEW

12.3.3 Paper feed control

After the leading edge of the paper passes the inlet flapper, it is conveyed by the interme-
diate feed rollers and crescent roller.
The intermediate feed rollers are normally out of contact. When the leading edge of the
paper reaches the intermediate feed roller contact area, the rollers are closed by the feed
roller contact solenoid (SL43) to feed the paper. The rollers open when the leading edge of
the paper strikes the paper positioning plate. This is repeated for each sheet of paper.
When the leading edge of the first sheet of paper reaches the paper positioning plate, the
paper positioning plate paper sensor (PI50) detects the paper. However, as the first sheet
continues to be detected by the sensor, the arrival of the second sheet is not detected.
The crescent roller continues to rotate while the paper is being collected. This results in
the leading edge of each sheet striking the paper positioning plate, ensuring that the leading
edges of the stack are aligned.
The paper jogging motor (M35) drives the jogging plate each time paper is collected,
aligning the left and right edges of the paper.
1) The solenoid is on while the paper is being fed, and the rollers are in contact.
2-110
COPYRIGHT© 2001 CANON INC.
Intermediate
feed roller
Feed motor
M41
F02-1203-06
2000 2000 2000 2000
ON
SL43
Feed roller
contact solenoid
CANON SADDLE FINISHER K3/K4 REV.0 MAR. 2001