Konica Minolta bizhub c650 Service Manual page 396

Theory of Operation Ver. 1.0 Feb. 2007
C. Punch control (PK-513)
Transmitting the start signal from the main body, the FNS conveyance motor rotates.
In the punch mode, M1 stops temporarily a specified period of time after the FNS entrance
sensor detects the trailing edge of the paper.
At the same time, the punch motor [9] drives the shaft [10] to rotate a full circle. The eccen-
tric cams [2] rotate in sync with the shaft to move down the punch blade [1] to conduct the
punch operation. The punch motor stops and the punch operation is completed when the
punch home sensor [3] turns ON.
The punch motor rotates again to convey the paper a specified period of time after it stops
temporarily.
[1] Punch blade
[2] Eccentric cam
[3] Punch home sensor (PS301)
[4] Punch blade at the lower position
[5] Drive arm
[2]
[10]
[9]
[8]
[3]
[7]
[2]
[5]
[1]
[6]
[6]
[7]
[8]
[9]
[10] Shaft
[1]
[2]
[4]
Paper
Punch blade at the upper position
Front side
Punch motor (M301)
4. Punch section
A04ET2C009AA
15