Chapter 3 Exposure System; Outline Of Operation; Varying The Reproduction Ratio - Canon NP6260 Service Manual

I. OUTLINE OF OPERATION
A. Varying the Reproduction Ratio
The reproduction ratio in the axial direction of the drum is varied by the lens drive
system, while that in the peripheral direction of the drum is varied by the scanner drive
system and the main drive system.
The lens drive system uses a zoom lens, which varies the reproduction ratio in the
drum axial direction by changing the focal distance and the position of the lens as shown
in Figure 3-101.
The scanner drive system varies the reproduction ratio in the peripheral direction of
the drum by moving the No. mirror faster (for reduction) or slower (for enlargement).
Reference:
a. The copier will not move the mirror to suit any reproduction.
b. The peripheral speed of the drum is the same as the speed of the movement of
the mirror in Direct.
COPYRIGHT © 1997 CANON INC.
Direct
F
Reduce
F1
Enlarge
F2
Figure 3-101
CANON NP6560/NP6360/NP6260 REV. 0 NOV. 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 3 EXPOSURE SYSTEM

F'
F1'
F2'
3-1