Fusing Temperature Control - Konica Minolta BIZHUB C3100P Service Manual

(2) Fusing speed control (control of loop before fusing)
• To prevent double transferred images and brush effects from occurring, the difference between the fusing speed and the paper
conveyance speed during image transfer is corrected.
• The loop detection sensor detects the length of the loop formed in the paper between the 2nd transfer roller and the fusing roller. The
fusing speed is then varied according to the paper type. By varying the fusing speed, paper is prevented from being misfed or contacting
the charge neutralizing cloth.
• No loop control is provided to perform the fusing process when envelopes are used (to prevent wrinkles).
[4]
[1] Pressure belt
[3] Actuator
(3) Fusing roller deformation prevention control
• To prevent the fusing roller from being deformed, the fusing roller is forcibly turned if it is left idle for a predetermined period of time.
• Operation timing
1. If the main body remains in the standby state for more than a predetermined period of time, the fusing motor is energized for a
predetermined period of time.
2. If the main body remains in the power save mode for more than a predetermined number of days, the temperature adjustment is
started. After the temperature rises to a predetermined value or more, the transport motor is energized for a predetermined period of
time.

12.3.2 Fusing temperature control

• To fuse the toner image on the paper (image yet to be permanently fixed) properly into the paper, the heater lamps are turned ON and OFF
as necessary to bring the fusing temperature to an appropriate level.
• Thermistors are used to detect the surface temperature of the Fusing roller. The heater lamps are then turned ON and OFF as necessary to
achieve the set temperature.
<Temperature control for plain paper, A4, full color print, ordinary start>
Warm-up control
Printing
temperature
Warm-up
complete
temperature
Warm-up cycle completed
(1) Warm-up control
• Control is provided until the Fusing roller reaches the predetermined level.
1. Control start timing
• The power switch is turned ON.
• The main body leaves the power save mode.
• A door is closed.
2. Control termination timing
• The Fusing roller reaches a predetermined temperature.
[1]
[3]
Wait control Print control
O THEORY OF OPERATION bizhub C3100P > 12. FUSING
[2]
[2] Loop detection sensor (PS6)
[4] Fusing roller
Wait control
O-38
SECTION