Fixing; Characteristics; Whole-Circumference Ih Heating Method; Overview - Canon imageRUNNER ADVANCE 8105 Series Service Manual

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Technology > Fixing > Overview > Characteristics

Fixing

Overview

■

Characteristics

1) Whole-circumference IH heating method

This machine uses the IH heating method to heat the whole circumference of the Fixing
Roller. This method enables to shorten the warm-up time and high-speed printing.
Exciting Coil
<IH (Induction Heating) method>
Supplying high frequency current to the coil inside the Heater Unit generates a high
frequency magnetic field around the coil. By this magnetic field, an eddy current (induction
current) runs through the Fixing Roller and the Fixing Roller generates electricity by itself.
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Technology > Fixing > Overview > Characteristics
Fixing Roller
Core
Paper
Pressure roller
F-2-135 F-2-135
High-frequency
current
Exothermic
heat
2) Using magnetic shunt alloy to prevent temperature rise at the edge of the Fixing Roller
This machine uses degaussing alloy as a material of the Fixing Roller to prevent
temperature rise at the edge of the Fixing Roller (There is no control to cool the edge).
Magnetic shunt alloy becomes less likely to generate electric current by electromagnetic
induction because of its characteristic of losing magnetic property once it reaches a certain
temperature (Curie temperature). This principle restricts excessive temperature rise of the
Fixing Roller.
Fixing Roller
Temperature (deg C)
230
220
210
200
190
180
170
160
60 120 180
2-104
Flux
Magnetic material
(Ferrite Core)
Coil
Metal
Eddy current
F-2-136 F-2-136
Reference value
Time (sec)
240 300 360
F-2-137 F-2-137
2-104