Canon Puncher Unit-L1, Service Manual

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Chapter 2
2-2
2.2 Feed Drive System
2.2.1 Overview
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The puncher unit is located on the feed path between the host machine and the finisher, and successively punches
holes when the paper stops temporarily.
The paper delivered from the host machine is fed by the punch feed roller. The punch feed roller is driven by the
punch feed motor. When the trailing edge of the paper reaches the puncher unit, the inlet roller of the finisher unit
temporarily stops the paper and holes are punched on the trailing edge of the paper.
The following shows the names and functions of the motors and sensors used in punching operation:
T-2-1
T-2-2
2.2.2 Constraction of the Control System
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The puncher unit consists of a die and hole puncher (punch blade).
The hole puncher is driven by the punch motor (M61). The hole puncher is attached to the
eccentric cam of the punch shaft, and rotary action of the punch shaft is converted to reciprocal motion to perform
punching.
Punch motor (M61) is a DC motor. The home position of the punch shaft is detected by punch home position sensor
Motor Function
Punch motor (M61) Drives the punch unit.
Horizontal registration motor (M62) Drives the punch slide unit.
Punch feed motor(M63) Drives the punch feed roller.
Sensor Function
Horizontal registration home
position sensor (PI61) Detects the punch slide unit home position.
Punch motor clock sensor (PI62) Detects the punch motor clock.
Punch home position sensor (PI63) Detects the punch shaft home position.
Horizontal registration sensor
(LED1 to LED4,PTR1 to PTR4) Detects the position of the rear edge of paper.
Trailing edge sensor (LED5,PTR5) Detects the trailing edge of paper.
Scrap full detector sensor
(LED6,PTR6) Detects the state of the punch waste case (full).