Pickup Roller Assembly And Separation Roller - Canon DADF-AV1 Service Manual

2. Technical Explanation
■ Stream reading
The stream reading starts when the leading edge of a document reaches the reading point and the read start signal is received
from the host machine.
"Stream reading" is a scan function which a document is scanned while feeding along the Document glass. The Scanner which
is fixed under the Document glass reads the image.
A document is fed by the Lead roller 1 (upper) and the Platen roller driven by the Read motor (M2). The read image is stored in
the memory of the host machine.
M2
Platen roller
Document glass Scanner

Pickup Roller Assembly and Separation Roller

The Pickup roller assembly consists of the Pickup roller and the Feed roller.
When the start key is pressed or a document pickup signal is input, the Pickup motor (M1) drives to lower the Pickup roller
assembly through the Pickup clutch (CL1) and then the Pickup roller and the Feed roller rotates to feed a document to the
Registration roller.
The Pickup roller assembly is equipped with stoppers to prevent that a document is inserted deeper than appropriate position.
The Separation roller is used to improve the separation performance while picking up a document.
Stopper
Pickup motor(M1)
Pickup roller
Document
Pickup clutch(CL1)
Stopper
Feed roller
Separation roller
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