Canon DADF-R1 Service Manual page 103

5) When the host machine's scanner starts to move in reverse, the machine rotates the transport belt to move the
1st original to the reversing assembly. At this time, the machine butts the lead edge of the original against the
reversing roller to remove the skew.
Butting
6) The machine rotates the reversing roller and the transport belt to move the original over the copyboard glass.
When the trail edge of the 1st original has moved past the pre-registration roller paper sensor (S2), the
machine moves the original over a specific distance using the transport belt.
Pre-registration roller
paper sensor(S2)
7) The host machine's scanner starts to scan the original as part of printing operation.
At this time, the machine picks up the 2nd original, and executes pre-reversal. (See steps 1 and 2.)
2nd original
8) When the host machine's scanner starts to move in reverse, the machine rotates the reversing roller and the
transport belt to move the 1st and 2nd originals.
2nd original
F-3-81
F-3-82
Scanning
(printing)
F-3-83
1st original
F-3-84
Chapter 3
3-45