Canon imageRUNNER ADVANCE C5255, Руководство по обслуживанию, Страница: 142 / 1443

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Technology > Pickup Feed System > Various Controls > Fixing / Registration Assembly
Technology > Pickup Feed System > Various Controls > Fixing / Registration Assembly
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Fixing / Registration Assembly
● Overview
Parts / Drive Configuration
Registration motor(M19)
Transparency sensor(UN51)
Vertical path sensor(UN53)
Vertical path roller
Registration sensor
(PS33)
Pre-registration sensor flug
Registration sensor flug
Registration roller
Cassette 1 pre-registration
sensor(PS55)
F-2-139
● Registration Control
OHP Detection
Transparency detection is performed as a measure for the case where paper other than
transparency is fed with transparency mode. Detection is performed using the Transparency
Sensor and Registration Sensor. Presence of transparency is detected when the
Transparency Sensor does not detect presence of paper and the Registration Sensor detects
presence of paper.
Registration Control
To make the paper straight-enter the transfer assembly, registration control is executed.
In iR ADVANCE C5255/5250/5240/5235, detection of registration position is performed using
the Registration Sensor. However, with this machine, the Transparency Sensor is used to
perform registration control. To realize faster paper feed, the Transparency Sensor which can
perform the detection faster is used.
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
alleviate the noise generated by entry of paper to the Registration Roller, the paper feeding
speed is reduced when the Transparency Sensor turns ON.
● 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.