Controlling The Phase Of The Crescent Roller - Canon FINISHER-C1 Service Manual

E.

Controlling the Phase of the Crescent Roller

1. Outline
If alignment was executed while the crescent roller is in contact with the stack of sheets, the
resulting friction against the roller causes the stack to move inappropriately (Figure 3-317). To
prevent such a problem, the phase of the roller is identified and used to determine the timing of
alignment operation.
The phase of the crescent roller is identified by the crescent roller phase sensor (PI12S). The
flag for the crescent roller phase sensor is mounted to the crescent roller shaft. The flag will leave
the sensor while the roller shaft rotates, turning on or off the sensor, enabling the assumption that
the crescent roller is positioned at the opposite side of the stack (Figure 3-319). The alignment
plates are operated to correspond with this change in the state of the sensor.
COPYRIGHT © 1998 CANON INC.
CHAPTER 3 SADDLE STITCHER UNIT BASIC OPERATION
Figure 3-317
FINISHER-C1/SADDLE FINISHER-C2 REV. 0 DEC. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 3-25