Pickup Unit And Stopper; Document Reversing; Basic Operation - Canon DADF-AG1 Service Manual

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Technology > Controls (DADF) > Document Reversing > Basic Operation

■ Pickup Unit and Stopper

The pickup unit consists of a pickup roller and feed roller.
When the print start key is pressed or a document pickup signal is input, the pickup/feed
motor (M1) turns in the reverse direction to lower the pickup unit via the pickup clutch (CL1),
turning the pickup roller and feed roller to feed the document.
The stopper rises in conjunction with the pickup roller unit.
When the document is picked up, the separation pad and separation plate prevent multiple
sheets from being fed together.
When the document is fed to the registration roller to be looped, the registration clutch (CL2)
operates and the power of the pickup/feed motor is transmitted to the registration roller to
feed the document.
ADF motor
Stopper arm
Pickup clutch (CL1)
Feed roller
2 Technology > Controls (DADF) > Document Reversing > Basic Operation
Document
Pickup roller
Stopper arm
Separation pad unit

Document Reversing

■ Basic Operation

There are two types of document reversal operation: one that is performed from the top to the
reverse side of the document and the other that is performed from the reverse side to the top
of the document.
Since the basic operation methods are identical, only the reversal operation performed from
the reverse side to the top is discussed below.
Top side pickup
The pickup/feed motor (M1) drives the read roller 1 and platen roller to scan the surface of
the document.
After completion of scanning, the read roller 2 and delivery reversal roller feed the document
to the delivery unit.
M1
Read roller 2
Platen roller
Read roller 1
F-2-15
M1
Delivery reversal roller
S
L
2
2-9
S
L
2
F-2-16
2-9