Crescent Roller Phase Control - Canon SADDLE FINISHER K3 Service Manual

12.3.5 Crescent roller phase control

a. Overview
If alignment is carried out while the crescent roller is in contact with the stacked paper,
movement of the paper may be obstructed by friction of the roller and alignment will not be
performed properly (Figure F03-103-16). To prevent this, the alignment timing is decided by
detecting the roller phase.
The crescent roller phase is detected by the crescent roller phase sensor (PI72). The flag
for the crescent roller phase sensor is attached to the crescent roller shaft. The sensor flag
disengages from the sensor while the roller shaft is rotating, and when the sensor goes from
ON to OFF the crescent roller is in the opposite direction to the paper stack. (Figure F02-
1203-17) The jogging plates start the paper alignment operation when the sensor status
changes.
Flag
M41
Feed motor
COPYRIGHT© 2001 CANON INC.
Crescent roller
phase sensor (PI53)
Paper stack
2000 2000 2000 2000
CHAPTER 2 OPERATION OVERVIEW
Crescent roller
F02-1203-17
CANON SADDLE FINISHER K3/K4 REV.0 MAR. 2001
Jogging plate
2-115