Print Temperature Control - Canon imageRUNNER ADVANCE C255 Series Service Manual

Print Temperature Control

■ Startup (initial rotation) Temperature Control
A fixing temperature is increased to a printable temperature after receiving a command to start printing.
■ Print Temperature Control
This is a control to set an optimal target temperature to prevent fixing error or high temperature offset. Temperature is controlled
to keep the specified target temperature during printing.
Setting the target temperature
A target temperature is determined according to the paper type/size, time which elapsed from when fixing temperature control
(including standby control) finished the last time, and fixing temperature when startup control started.
Temperature control during printing
When the paper passes through the Fixing Assembly, temperature is controlled to keep the target temperature according to
the detected temperature of the Main Thermistor.
Paper interval temperature control
The paper interval temperature is decreased to prevent temperature increase when the paper interval becomes wider than
normal conditions at down sequence
Paper Interval Temperature = Target temperature during printing - (0 to 20 deg C)
*1: At down sequence
• An interval between the first side and the second side at 2-sided printing
• At execution of controls (ATR control, registration control, ATVC control)
• At continuous printing of small-size paper (paper shorter than A4R/LTR in width-direction length)
• When power for maintaining the target temperature is not supplied
• When the Sub Thermistor detects abnormally high temperature even for A4R size or larger
*2 The fixing temperature is determined depending on the elapsed time since the time paper has passed through the fixing
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