Duplex Feed Control; Duplex Wait Control - Canon imageRUNNER ADVANCE C5045 Series Service Manual

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Duplex Control

Duplex Feed Control

On this machine, the paper is revered outside the machine with using the reverse mouth.
After that, feed operation is performed by 340mm / sec on imageRUNNER ADVANCE C5051
/ C5045 (300mm / sec on imageRUNNER ADVANCE C5035 / C5030).The paper fed to the
duplex path is transferred to the duplex re-pickup position unless there is paper on the path
at the downstream side. If there is paper on the downstream path, it is delivered from the
reverse path or it stops at the duplex upstream.
In case of output to the First / Second Delivery Mouth, 5-sheet circulation is used for small
size (LTR or smaller); however, 3-sheet circulation is used for large size (larger than A4R).
This is because 2 sheets of paper cannot wait on the duplex feed path.
In case of output to third delivery mouth, 3-sheet circulation is used for middle size (A4R
or smaller); however, 1-sheet circulation is used for large size (larger then A4R) since the
succeeding paper enters the reverse path before the preceding paper goes through the
reverse path and jam will occur.
Following is the each duplex reverse position and the number of sheet circulation by size.
First / Second Delivery
Small size (LTR or smaller)
Middle size (A4R or smaller)
Large size (larger than A4R)
Compared to the conventional model (imageRUNNER C3380), feed speed at the duplex feed
assembly is slowed down. This is to get the precise feed, to reduce the noise and the motor
loads. However, by changing the circulation algorism, the speed is accelerated when printing
a number of sheets and 51 sheets / min speed is achieved.
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Third Delivery
5 3
3 3
3 1
T-2-58 T-2-58

Duplex Wait Control

To realize 5-sheet circulation, there are 2 duplex wait positions. Following is the duplex wait
position for small paper.
50mm
Duplex wait position
両面入口待機位置
Since the curve of duplex path shape gets steeper at the leading end, as duplex wait position
gets closer to the registration, curl tends to occur frequently. For the paper smaller than A3,
the duplex wait position is 50mm away from the Registration Sensor toward upstream in due
consideration with the productivity. In case of A3 paper or larger, the sheet interval is wide
enough to satisfy the productivity, so the position which avoids curl occurrence and is 85mm
away from the Registration Sensor on the upstream side is to be the duplex wait position.
Duplex inlet wait position
42.4mm
F-2-147 F-2-147
2-99
2-99