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COPYRIGHT
©
2001 CANON INC. 2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
CHAPTER 5 PICK-UP/FEEDING SYSTEM
5-11 P
3.4 Operation of the Cassette Lifter
The lifter is operated as necessary in the course of printing to maintain the stack of sheets
to a specific height.
3.4.1 Operation of the Lifter During Printing
The lifter is controlled by the movement of the pickup roller shaft. When the pickup roller
shaft pushes the lifter trigger lever, the cam is released, and the lifter starts to move up until
the lifter trigger lever stops the cam.
1) Each time the pickup roller DOWN so-
lenoid (SL1) goes ON, the pickup roller
shaft [2] moves down to initiate pickup
operation.
2) When the sheets [6] decrease and, as a
result, the descent distance [3] of the
pickup roller increases, the pickup roller
shift pushes down the lifter trigger lever
[4].
3) When the lever is pushed down, the cam
[5] is released, causing it to rotate.
4) The rotation of the cam turns the eccen-
tric cam [3] mounted to the same shaft.
The eccentric cam operates the lifter UP
lever [2] to move up the lifter gear [1].
5) The lifter moves up and, as a result, the
paper stack moves up; when the pickup
roller shaft reaches a specific height, the
lifter trigger lever is drawn back by the
work of a spring, thereby stopping the
cam.
F05-304-01
The foregoing series of operation is repeated to maintain the height of the paper stack to a
specific level. The cassette pickup operation ends when paper runs out and the cassette pa-
per sensor detects the absence of paper.
[1]
[2]
[4]
[7]
[6]
[3]
[5]
SL1
[1]
[2]
[3]