Generating The Image Leading Edge Signal - Canon 1130 Service Manual

C. Generating the Image Leading Edge Signal
1. Outline
The copier controls original exposure, image processing, laser exposure, high voltage, and
feeding mechanisms with reference to the leading edge of paper (image leading edge signal) on the
transfer drum.
The image leading edge signal is generated about 0.3 sec before the distance a (between point
of laser exposure on the photosensitive drum and point of transfer) and distance b (between leading
edge of paper and point of transfer) become equal.
Leading edge of
paper
COPYRIGHT © 2002 CANON INC.
paper
Transfer drum
Generation of the image leading edge signal
Figure 2-203
CANON CLC1100/1130/1150/1160/1180 REV.2 FEB. 2002 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 2 BASIC OPERATION
Photosensitive drum
b
Point of laser exposure
a
2-7