Aligning The Sheets - Canon FINISHER-C1 Service Manual

CHAPTER 3 SADDLE STITCHER UNIT BASIC OPERATION
D.

Aligning the Sheets

The alignment plate motor (M5S) drives the alignment plates each time a sheet is deposited,
thereby putting both right and left edges of the sheet in order. The alignment plate motor is a 4-
phase stepping motor. The position of the alignment plate is identified in reference to the number of
motor pulses from the alignment plate home position sensor (PI7).
Go through the descriptions that follow for an idea of what takes place when the saddle stitch-
ing mechanism operates on two sheets.
1) When the first sheet has been deposited, the alignment plates butt against the right and left
edges of the stack (first alignment).
The alignment plates leave home position in advance and remain in wait at points 10 m from
the edges of the stack.
2) The alignment plates move away from the edges of the stack over a short distance and then butt
against the edges once again (2nd alignment).
3) The alignment plates escape to points 10 mm from the edges of the stack.
3-22 COPYRIGHT © 1998 CANON INC.
Sheets
Alignment
plate
Alignment plate
Alignment plate home
Paper positioning
position sensor (PI6)
plate
Figure 3-309
Figure 3-310
Figure 3-311
FINISHER-C1/SADDLE FINISHER-C2 REV. 0 DEC. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)