Theory of Operation Ver. 8.0 Jun. 2008
19. Fusing section
13
5
2
Composition/Operation
A. Temperature adjustment control of IH heater
• Temperature of the heating roller is controlled within the given range during warm-up,
printing and standby.
• Temperature of the heating roller is measured with the NC sensor, and the temperature
change (up/down) is monitored by comparing the current temperature with the value of
one second before.
• When the temperature goes up beyond the upper limit, the electric energy goes down.
• When the temperature goes down under the target figure, the electric energy goes up.
B. Operation flow during warm-up
• When the temperature of the heating roller reaches a predetermined level, the pressure
roller starts pressing.
• When the temperatures of all rollers go beyond the temperature set for warm-up, printing
becomes available.
• If printing request comes, the machine starts printing. If not, the mode goes to “standby
temperature control”.
• A different warm-up completion time is set only for the
MF
45
0
for Taiwan because of its
low power that can be used.
(1)
MF
550/
MF
45
0
warm-up completion temperature
(2)
MF
550 only for Taiwan warm-up completion temperature
(3)
M
F
45
0
only for Taiwan warm-up completion temperature
A00JT2C231AA
Temperature change of heating roller
One second
Temperature check
Temperature
Upper limit
Target
temperature
Lower limit
High
Low
Electric
energy
Time (sec.)
2
Warm-up
Completion
time
Heating roller
temperature
Fusing pressure roller
temperature
Soaking roller
temperature
In monochrome
and color
30 seconds 170 degrees centigrade 70 degrees centigrade 50 degrees centigrade
2
Warm-up
Completion
time
Heating roller
temperature
Fusing pressure roller
temperature
Soaking roller
temperature
In monochrome
and color
60 seconds 170 degrees centigrade 90 degrees centigrade 50 degrees centigrade
2
Warm-up
Completion
time
Heating roller
temperature
Fusing pressure roller
temperature
Soaking roller
temperature
In monochrome 30 seconds 165 degrees centigrade 70 degrees centigrade 50 degrees centigrade
In color
60 seconds 185 degrees centigrade 100 degrees centigrade 70 degrees centigrade
Y107522-3 Theory of Operation
