III. SCANNER DRIVE MECHANISMA. Driving the Scanner1. OutlineThe scanner is driven by the scanning motor (M2). The scanning motor changes itsdirection of rotation to move the scanner forward and in reverse. The speed of rotationwhen moving the scanner forward varies continuously according to the selectedreproduction ratio; however, the speed of rotation when moving the scanner in reverseremains a specific value (about 2.7 times when moving the scanner forward) regardlessof the selected reproduction ratio.The distance over which the scanner travels varies according to the length of copypaper and the reproduction ratio.Figure 3-3013-6CHAPTER 3 EXPOSURE SYSTEMCOPYRIGHT © 1997 CANON INC. CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)Scanning motor (M2)ForwardNo. 1 mirror mountSignal plateReverseNo. 2 mirror mountScanner home positionsensor (PS1)Scanner home positionsignal (SCHP)Scanning motor drive commandDC controller PCBMotor driver 1 PCB
