Canon DADF-J1 Service Manual page 76

CHAPTER 2 OPERATIONS AND TIMING
3) When the leading edge of the original has moved past the post-registration roller (S3),
the feeding belt is rotated for a specific length, and the original is stopped once (wait po-
sition).
(The DADF starts to keep count of the distance of movement after it has moved past the
pre-registration roller paper sensor (S2).)
Pre-registration roller
paper sensor (S2)
Post-registration roller
paper sensor (S3)
4) The feeding belt is rotated to move the original.
When the original has moved a specific distance (in relation to the count kept since its
trailing edge has moved past the pre-registration roller sensor (2)), the DADF issues the
image leading edge signal to the copier.
The copier starts reading the original in response to the image signal. At this time, the
2nd original is also moved and then stopped in wait position.
Pre-registration roller
paper sensor (S2)
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F02-206-22
F02-206-23
COPYRIGHT © 2001 CANON INC.
Wait position
2000 2000 2000 2000 CANON DADF-J1 REV.0 MAR.2001