Separation Mechanism - Canon imageFORMULA DR-G2140 Service Manual

3. Separation Mechanism

The separation section consists the feed
roller, separation pad and retard roller. A
torque limiter is assembled in the retard roller.
When the overlapped documents have
been fed, the overlapped documents are
stopped at the separation pad, and if it does
not effect, the retard roller separates the over-
lapped documents.
The configuration of the separation
mechanism is shown below.
 Separation pad separation (at Normal)
Figure 2-302
 Retard roller separation (at Normal)
Figure 2-303
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And 3 types of the separation mode are
available to adjust a kind of document.
1) Separation mode: Normal
This is good for the normal documents.
The pickup roller downs and feeds the
documents with a normal rotation. And it
stops rotations when the registration front
sensor detects a document.
The feed roller rotates normally, and the
retard roller stays without any rotation.
Therefore, the document only attaches the
feed roller side is fed to inside if the over-
lapped documents reach at the retard
roller.
If one sheet of document reaches the sep-
aration section, the retard roller rotates
with a following direction of feed roller and
document.
2) Separation mode: Thin paper
This is good for the thin documents that
are easy to be jammed.
The pickup roller downs and rotates with
lower speed to feed the documents. And
the pickup roller lifts and stop rotations
when the registration front sensor detects
a document. It avoids rushing to feed the
documents.
Operations of the feed roller and retard
roller are the same as ones of the Normal
mode.
3) Separation mode: High
This is good for the sticky document that
are easy to be double feed.
Operations of the pickup roller and feed
roller are the same as ones of the Normal
mode.
The retard roller rotates with reverse direc-
tion till the registration front sensor detect
a document. It makes a separation harder.
When the registration front sensor detects
a document, the retard roller rotates with a
following direction of feed roller and docu-
ment.
CANON DR-G2140/G2110/G2090 FIRST EDITION
CHAPTER 2 FUNCTION & OPERATION
2-15