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2
Controls > Construction of the Control System
Construction of the Control System
The puncher unit consists of a die and hole puncher (punch blade).
The punch blade is driven by the punch motor (M102). The punch motor (M102) drives the
rack gear back and forth. This moves the punch blade up and down with the punch blade up/
down support pin to perform punching.
The home position of the punch blade is detected by Punch 2-/3-hole sensor (S103) and
punch HP sensor (S104), and the lowering position of the punch blade is detected by the
punch position sensor (S102).
The punch motor (M102) is a DC motor. In order to accurately stop the punch motor (M102)
at home position, the punch motor clock sensor (S105) counts the prescribed number of
clocks and stops the punch motor.
There is an inlet sensor (S106) at the entrance of the puncher unit to detect the leading
and trailing edge of the media. The inlet media feed path of the puncher unit has 5 photo
receiving transistors (photosensor PCB) on the upper side and five sets of LEDs (LED PCB)
on the lower side to function as 5 sensors. These are horizontal registration sensor used to
detect the media far side position to determine the position to punch holes.
The punch motor, punch unit, and above sensors form the punch slide unit which moves back
and forth according to the media size. The back and forth movement is driven by the punch
slide motor (M101).
The home position of the punch slide unit is detected by the horizontal registration HP sensor
(S101). The punch slide motor (M101) is a 2 phase stepping motor.
Punch motor and punch slide motor are driven by the puncher driver PCB with control signal
from the finisher controller PCB.
The punch waste generated by punching operation is collected in the punch waste case. The
filling of punch waste is detected by a reflective type sensor (LED1/PT1 on punch waste full
detection PCB).
2
Controls > Construction of the Control System
Hole puncher (punch blade)
Rack gear
Hole puncher (punch blade)
Puncher base
2-6
Punch slide unit
Dies
2-6
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