Canon Color imageRUNNER C5180 Series, Руководство по обслуживанию

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Chapter 11
11-7
11.2.1.3 Fixing Arch Control
Controlling Fixing Arch
The fixing arch control is the control for forming appropriate arching of paper.
The arching is formed with the difference of the speed between the fixing roller and the secondary transfer roller
by reducing the feeding speed of the fixing driver motor (M24) just before a paper reaches to the nip of the fixing
assembly.
When there is enough arching, the fixing arch sensor (PS47) turns OFF.
When the fixing arch sensor (PS47) goes OFF, the fixing drive motor (M24) increases its rotation speed.
By adjusting the speed of the fixing drive motor (M24), an appropriate arching can be always formed.
This control ends when the trailing edge of paper leaves the secondary transfer roller.
Flow of Control
[1] Starting to Monitor the Arching of Paper
The machine starts to monitor the arching of paper as soon as its leading edge has fully reached a point +10
mm of the fixing nip (i.e., where the leading edge has fully reached the fixing assembly).
[2] Controlling the Speed of the Fixing Motor
Paper is first moved to the fixing assembly at 99% of the process speed, which is then switched as follows:
When the fixing arch sensor goes on [B],
increases the fixing motor speed (to 103% of the process speed).
When the fixing arch sensor goes off [C],
decreases the fixing motor speed (to 99% of the process speed).
[3] The machine ends monitoring the arching when the trailing edge of paper leaves the secondary transfer
roller.
F-11-5
[A]
[A]
[B]
[B]
[A]
[B]