Fixing Unit Detection - Canon imageRUNNER ADVANCE C3500 III Series Service Manual

To prevent these symptoms, one Arch Sensor (PS11) located at the inlet of the Fixing Unit detects the slack of paper and adjusts
the rotation speed of the Fixing Motor. This keeps an appropriate level of paper slack.
The Arch Sensor (PS11) detects the paper arch and changes the drive speed of the Fixing Motor as follows:
1. When the paper leading edge passes in front of the fixing nip area, drive speed of the Fixing Motor is reduced against the
process speed. The speed is maintained until the paper leading edge passes the fixing nip area.
2. Drive speed of the Fixing Motor is switched according to the status of the Arch Sensor (PS11).
• If the sensor remains ON for more than the specified period of time: Accelerated
• If the sensor remains OFF for more than the specified period of time: Decelerated
3. When the paper trailing edge passes the secondary transfer nip area, drive speed of the Fixing Motor drive returns to constant
speed.
* Values for A4/LTR plain paper. The change ratio varies according to the paper size.
No.
[1] Fixing Film
[2] Fixing Pressure Roller
PS11 Arch Sensor

Fixing Unit Detection

During warm-up rotation (at power-on/recovery from sleep mode/closing of the cover), the Fixing Unit detection signal is input to
the DC Controller to detect the Fixing Unit.
When it is judged that the Fixing Unit is absent, the machine displays the message "Set the Fixing Unit." on the Control Panel
and stops operation.
Sensor : OFF
Slack of paper is small
[1] [2]
PS11
Sensor : ON
Slack of paper is large
Name
99
2. Technology