Punch Operation - Canon External 2/3 Hole Puncher-B1 Service Manual

Chapter 2
of the paper for determining the hole punching position.
The punch motor, puncher unit and above sensors comprise the punch slide unit. This unit moves backwards and forwards according to the size of the paper. Back-
ward and forward movement is driven by the horizontal registration motor (M62). The home position of the punch slide unit is detected by the horizontal registration
home position sensor (PI61). The horizontal registration motor (M62) is a 2-phase stepping motor.
The punch motor and horizontal registration motor is driven by the punch controller PCB
according to control signals from the finisher controller PCB.
Punch scraps caused by punching are stored in the punched scrap container. Scrap full detection is performed by a reflective sensor (LED6 and PTR6 on the scrap
full detector PCB unit).

2.2.3 Punch Operation

The hole puncher is driven by the punch motor (M61), and its position is monitored by the punch home position sensor (PI63).
The hole puncher makes a single round-trip movement (punching) as the punch shaft rotates 180°Å@from home position.
In the case of a 2-or-3 hole type, the half sector of the punch shaft is used when punching 2 holes while the half sector on the opposite side is used when punching
3 holes as instructed by the host machine.
<2-/4-hole Type>
At the home position, the punch home position sensor is ON. Punching of the first sheet ends when the punch shaft has rotated in the forward direction 180°, and
the state of the punch home position sensor has changed from OFF to ON. Punching of the second sheet ends when the punch shaft has rotated in the reverse direction
180° , and the state of the punch home position sensor has changed from OFF to ON.
The following illustrates punching when two sheets are punched.
1) A hole is punched in the trailing edge of the first sheet.
2-2
Punch controller PCB (1/2)
3
4
5
3
4
5
Punch controller PCB (2/2)
F-2-2
PTR1
2
LED1
2
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