Canon DADF-B1 Service Manual page 32

1. Starting to Move an Original
When an original has been picked up and moved to the separation assembly, the feed motor (M2)
is rotated clockwise. Its drive reaches the registration roller and the feed belt link roller, and the
original is moved to the copyboard glass.
2. Slowing Down the Movement
When the pre-registration sensor (U502) detects the trailing edge of an original (OFF), the length
(in feeding direction) of the original is computed from the time of detection by the pre-registration
sensor and the number of clocks from the feed motor.
At the same time, the movement is decelerated gradually so that the trailing edge of the original is
moved to the image leading edge position on the copyboard glass.
COPYRIGHT © 1999 CANON INC. CANON DADF-B1 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 2 BASIC OPERATION
Figure 2-222
Figure 2-223
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