Canon DADF-R1, Service Manual

Page: 92 / 222

Chapter 3
3-34
2) The machine rotates the registration roller and the transport belt to move the original.
When the trail edge of the 1st original leaves the pull-off roller, the machine starts pickup of the 2nd original.
F-3-49
3) When the lead edge of the 1st original has moved past the post-registration roller paper sensor (S3), the
machine moves it over a specific distance using the transport belt and stops it (at standby position). (At this
time, the machine starts to keep track of the distance over which the 1st original moves after it has moved
past the pre-registration roller sensor (S2).)
F-3-50
4) The machine rotates the transport belt to move the original over a specific distance. The host machine reads
the original.
When the machine has moved the 1st original (based on the count reading started after the trail edge of the
original has moved past the pre-registration roller paper sensor (S2)), the machine sends the image lead edge
signal to the host machine.
In response to the signal, the host machine starts to read the original.
At this time, the machine starts to move the 2nd original.
F-3-51
2nd original
Pull-off roller
Standby position
Post-registration
roller paper sensor(S3)
Pre-registration roller sensor(S2)
2nd original
Pre-registration
roller paper sensor(S2)