
COPYRIGHT © CANON ELECTRONICS INC. 2018 CANON DR-G2140/G2110/G2090 FIRST EDITION
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CHAPTER 2 FUNCTION & OPERATION
III. FEED SYSTEM
1. Outline
The drive rollers are driven by each motor
and rotated by transmission of gears and
belts. In addition to a roller drive motor, a
pickup tray elevation motor is assembled. The
sensors for feed control are also mounted.
The main characteristics of the feed sys-
tem of this machine are shown below.
1) Pickup tray elevation
The elevation and the stop position of the
pickup tray can be controlled. Thus, a
large number of documents can be set and
the standby position of the pickup tray can
be selected.
2) Independent mechanism operation of the
right and left document guides
The document guides of the pickup tray
can be slid together and independently of
each other and the document guides of the
eject tray can be slid independently. Thus,
the reference position at which a docu-
ment is loaded can be set arbitrarily.
3) Document separation
Overlapped documents can be separated
and fed one by one with the retard roller
and feed roller. And 3 type of the separa-
tion mode (High/Normal/Thin paper) are
available to adjust a kind of document.
4) Double feed detection
This machine contains a pair of ultrasonic
sensors. Therefore, the following two dou-
ble feed detections are available: the doc-
ument length detection by the registration
front and back sensors, and the document
overlapping detection by the ultrasonic
sensor.
5) Eject speed control
If documents are fed at a high speed and
ejected at the same speed, alignment of
the documents deteriorates. The speed
when the trailing edge of the document is
ejected is reduced and deterioration of
alignment is prevented by controlling the
number of revolutions of the eject motor.
6) Staple detection
Feeding of stapled documents can be
stopped by installing a dedicated sensor at
the pickup inlet.
7) Skew detection
Document that is skewed and attached a
side end of feed path can be stopped by
installing sensors at side end of the pickup
inlet.