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CF5001 Ver.1.0 Sep. 2003 FIXING UNIT
2-63
II UNIT EXPLANATION
12.2.2 Pressure/release control
The pressure of the fixing roller /L onto the fixing roller /U is made by the reverse rotation of the fixing
motor (M29) and the cam mechanism.
A. Pressure/release operation
When the fixing motor (M29) [1] rotates in the reverse direction, the cam mechanism applies pressure (a
broken line in the drawing) onto the fixing roller /L [3]. There is a one-way clutch [4] provided between M29
and the cam mechanism to provide the transmission of driving force when M29 is rotating reversely, this
force is limited only to the cam. The detection of pressure/release is made by the fixing pressure release
sensor (PS16) provided on the same shaft as the cam.
B. Pressure/release control
Pressure on the fixing roller /L is released while in warm-up. When copy starts, the fixing motor (M29)
rotates reversely to apply pressure, and it stops when the fixing pressure release sensor (PS16) turns off.
The unit is now in the pressured state. M29 returns to the forward rotation to convey paper.
[1] START button (ON) [3] Fixing paper in conveyance
[2] Pressure operation
8050ma2045
[4]
[2]
[3]
[1]
[1]
[2]
[3]
8050ma2046
Fixing motor (M29) Forward
Backward
Fixing pressure release sensor (PS16)