Canon Puncher Unit-L1, Руководство по обслуживанию

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(PI63). To stop the DC punch motor accurately at its home po-sition, the punch motor clock sensor (PI62) counts a
predetermined number of clock pulses to stop the punch motor. A single punch operation is performed by rotating
the punch shaft 180° from its home position.
Five light sensors (photosensor PCB) are located at the upper side of the inlet paper feed path of the puncher unit and
a set of five LEDs (LED PCB) are located at the lower side. These sensors and LEDs function as five sensors. The
frontmost sensor (LED5, PTR5) are the trailing edge sensor and are used for detecting the trailing edge of the paper.
The remaining sensors (LED1 to LED4, PTR1 to PTR4) are horizontal registration sensors, and are used for detecting
the inner position 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. Backward 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).