Konica Minolta bizhub C658 Service Manual page 1875

bizhub C658/C558/C458/C368/C308/C258
13.3 Operation
13.3.1 Fusing drive release mechanism
• At the fusing drive position, transmit the driving force of the fusing motor to the pressure roller by a fusing drive release gear.
• Opening the right door places the fusing drive release lever in the fusing drive release position.
• With the fusing drive release lever in the fusing drive release position, the fusing drive release gear is disconnected from the fusing motor
and, instead, connected to the jam removal dial.
• If a paper misfeed occurs in the fusing section, opening the right door allows the jam removal dial to be used for removing the misfed
paper.
[1]
[7]
[8]
[1] Fusing drive position
[3] Fusing drive release gear
[5] Right door close position
[7] Pressure roller
[9] Jam removal dial
[11] Right door open position
13.3.2 Fusing speed correction
(1) Fusing loop control
• To prevent double transferred images and brush effects that occur due to a difference in speed between paper transport during image
transfer and fusing, a loop is formed in the paper between the 2nd transfer and fusing sections.
• The fusing loop sensor detects the length of the loop formed in the paper between the 2nd transfer section and the fusing roller.
• The fusing motor increases or decreases the fusing speed according to the length of loop in the paper, thereby ensuring that the length
of loop falls within a predetermined range.
Fusing loop sensor
Unblocking
Blocking
[6]
[5]
[9]
[10]
[11]
O THEORY OF OPERATION bizhub C658/C558/C458/C368/C308/C258 > 13.
FUSING SECTION (bizhub C458/C368/C308/C258)
[2]
[3]
[4]
[2] Fusing motor (M3)
[4] Fusing drive release lever
[6] Connected to fusing motor
[8] Fusing drive release position
[10] Connected to jam removal dial
- -
Loop amount
Large
Small
O-100
Fussing speed
Speed-up
Slowdown