Fixing / Registration Assembly; Registration Control; Ohp Detection; Fixing Arch Control - Canon imageRUNNER ADVANCE C5045 Series Service Manual

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Fixing / Registration Assembly

Overview
Parts / Drive Configuration
Registration motor(M19)
Registration sensor
(PS33)
Registration sensor flug
Cassette 1 pre-registration
sensor(PS55)
Pre-registration sensor flug
Transparency sensor(UN51)
Vertical path roller
2
Registration roller
Vertical path sensor(UN53)
F-2-144 F-2-144

Registration Control

OHP Detection

As the countermeasure for when the paper other than transparency film is fed in transparency
mode, OHP sensor is used as white paper detection to identify whether the fed paper is
transparency or not. However, since this is not used to identify the transparency for CLC, jam
will occur when CLC paper is fed.
Registration Control
To make the paper straight-enter the transfer assembly, registration control is executed.
After the paper passes through the Registration Sensor, the drive of the Pickup Motor (Multi-
Purpose Tray Pickup Motor, Duplex Pickup Motor) is turned OFF to stop the paper by the
distance from the Registration Sensor to the Registration Roller with arch amount added.
To reduce the noise when the paper enters the Registration Roller, speed is decreased by
200mm / sec upon Registration Sensor ON.
However, if the distance with the preceding paper is too far, productivity cannot be satisfied.
Moreover, the paper may be late for the image. In such case only, the speed is changed by
246mm / sec when the paper enters the Registration Roller.

Fixing Arch Control

To always feed the paper to the Fixing Unit in optimal status, this control is to monitor the
paper slack (arch) condition and to switch the feed speed at the Fixing Motor according to the
status.
This is executed between the Secondary Transfer Unit and the Fixing Unit. When the
Pressure Roller of the Fixing Unit expands with heat, circumference of roller is also increased.
Thus, even though the number of rotation is consistent, the feed speed at the fixing side is
faster than the feed speed at the secondary transfer side. To fix this, change the speed of the
Fixing Motor according to the arch condition using the Fixing Arch Sensor 1&2.
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