Scanner Drive System; Scanner Movement; Outline Of Movement - Canon NP6251 Service Manual

CHAPTER 3 EXPOSURE SYSTEM
III. SCANNER DRIVE SYSTEM
A. Scanner Movement

1. Outline of Movement

The scanner is moved forward or in reverse by changing the direction of rotation of
the scanner motor (M3).
The speed of rotation of the scanner motor when the scanner is moving forward
varies according to the selected reproduction ratio.
The speed of the scanner motor when the scanner is moving in reverse is 2.9 times
the speed when the scanner is moving forward regardless of the selected reproduction
ratio.
Scanner original
leading edge 1
sensor (PS3)
Scanner home
position sensor
(PS1)
3-6
COPYRIGHT © 1997 CANON INC.
Scanner original
leading edge 2
sensor (PS4)
Signal plate
No. 1 mirror mount
No. 2/No. 3
mirror mount
DC controller PCB
Figure 3-301
CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
Scanner motor
M3
Forward