II. LENS DRIVE SYSTEMA. Movement of the Lens1. Outline of the MovementThe copier uses center reference, in which copy paper is picked up and fed inrelation to the center of the feeding paths and originals are placed in relation to the rearof the machine (when using the copyboard cover). As such, the lens is moved in Y(vertical) direction even in Direct mode to suit the width of copy paper.n Using the Copyboard CoverFigure 3-201 (top view)The RDF installed to the machine uses center reference; when the size of theoriginal and the size of the copy paper are identical in Direct mode, the lens is not movedin Y (vertical) direction (Figure 3-202).If the size of the original and the size of the paper are different, on the other hand,or in Reduce/Enlarge mode, the lens is moved in Y (vertical) direction so that the imageon the copy paper will be correct.n Using the RDFFigure 3-202 (top view)Original(small)Original(large) Copy paper(small)LensCoy paper (large)Y directionOriginal(small)Original(large)Original(small)Lens position (Direct)for copy paper (small)Lens position (Direct)for copy paper (large)Copy paper(large)Y directionCOPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 3 EXPOSURE SYSTEM3-2
