Print Temperature Control - Canon imageRUNNER ADVANCE 4551i Service Manual

Print temperature control

Startup (warm-up rotation) temperature control
To increase fixing temperature to be ready for printing after receiving the print-start command
Print temperature control
To set optimal target temperature to prevent fixing failure or offset, and keep the specified target temperature during printing
1. Setting target temperature
Target temperature is specified depending on the paper type, paper size, elapsed time since the last control (including the
standby control) of fixing temperature and fixing temperature at the start of warm-up control.
2. Temperature control during printing
When the paper passes in the fixing unit, the fixing temperature is controlled to keep the target value (see the table on the
next page) according to the detection result of main thermistor.
3. Sheet-to-sheet distance temperature control
To prevent the excessive temperature rise and to save the power consumption, the target temperature is set 5 deg C low (in
case of plain paper *1) from the printing temperature.
*1. When the fixing mode is the plain paper 1, plain paper 2 or thin paper, set to -5 dec C. In the other cases, set to -15 or
-20 deg C low or +5 deg C high according paper type
Target temperature during printing
The control temperature is determined according to the fixing mode and to the fixing temperature at the start of warm-up control.
The following 16 modes are provided as the fixing mode. The fixing modes are changed by the paper setting and the service
mode setting.
The following table is the control temperature when the fixing temperature is less than 55 deg C at the start of warm-up control.
Fixing Mode
Fixing mode
Thin paper
Plain paper 1
Plain paper 1_N1
Plain paper 1_N3
Plain paper 2
Paper setting
Thin paper
Plain paper 1
Translucent paper
Plain paper 1
Translucent paper
Plain paper 1
Translucent paper
Recycled paper
Color paper
Punch hole paper
107
Weight (g/m
52 to 59
60 to 63
64 to 80
60 to 63
64 to 80
60 to 63
64 to 80
64 to 80
64 to 80
64 to 80
2. Technology
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