III. SCANNING DRIVE SYSTEMA. Driving the Scanner1. OutlineThe scanner drive system is driven by the scanner motor (M2). The scanner motorchanges the direction of its rotation between when the scanner moves forward and whenit moves in reverse; the speed of its rotation varies according to the selectedreproduction ratio. However, the speed of its rotation remains constant regardless of thereproduction ratio when the scanner is moving in reverse; 2. 5 times as fast as when thescanner is moving forward.The distance traveled by the scanner varies according to the length of copy paperand the selected reproduction ratio.Figure 3-301COPYRIGHT © 1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 3 EXPOSURE SYSTEM3-5SC-COM ASC-COM BSC-ASC-A*SC-BSC-B*DC controllerPCBNo. 2 mirror mountNo. 1 mirror mountForwardPS1 light-blocking plateScanner home position detection signal (SCHP)Scanner home position sensor (PS1)
