hp Color 9850mfp FIXING UNIT 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 broken line in the drawing) onto the fixing roller L [3]. There is a one-way clutch [4] provided between M29 When the fixing motor (M29) [1] rotates in the reverse direction, the cam mechanism applies pressure (a 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 II UNIT EXPLANATION sensor (PS16) provided on the same shaft as the cam. [1] [4] [3] [2] 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 2-67 [2] [3] Fixing motor (M29) Forward Backward Fixing pressure release sensor (PS16) [1]