Scanner Drive Mechanism; Driving The Scanner; Outline - Canon NP6330 Service Manual

CHAPTER 3 EXPOSURE SYSTEM
III. SCANNER DRIVE MECHANISM
A. Driving the Scanner

1. Outline

The scanner is driven by the scanning motor (M2). The scanning motor changes its
direction of rotation to move the scanner forward and in reverse. The speed of rotation
when moving the scanner forward varies continuously according to the selected
reproduction ratio; however, the speed of rotation when moving the scanner in reverse
remains a specific value (about 2.7 times when moving the scanner forward) regardless
of the selected reproduction ratio.
The distance over which the scanner travels varies according to the length of copy
paper and the reproduction ratio.
Scanning motor drive command
No. 2 mirror mount
Motor driver 1 PCB
3-6
Reverse
Scanner home position
sensor (PS1)
Figure 3-301
COPYRIGHT © 1997 CANON INC.
Scanning motor (M2)
Forward
No. 1 mirror mount
Signal plate
Scanner home position
signal (SCHP)
DC controller PCB
CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)