# Part
1 Sensor (SHPF entrance)
2 Skew correction
3 Entrance roller
4 Diverter feed roller
5 Puncher
The motor (punch drive) moves the punch unit frames in opposite directions. The motion causes the slots on the frames
to move the punchers up and down.
# Part
1 Puncher
2 Punch unit frames
3 Motor (punch drive)
The chad accumulate in the hole punch box below the punch unit. When the light from the sensor (SHPF hole punch
box full, transmit) is blocked, the printer determines that the box is full.
4021, 7421
Appendix C: Theory of operation
652
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