Technical Troubleshooting; Theory Of Operation - Canon Professional Puncher-A1 Service Manual

5.

TECHNICAL TROUBLESHOOTING

5.1

THEORY OF OPERATION

The CANON Stream Punch is a machine that punches various die set hole patterns
into single sheets of paper. The machine is placed between a printer / copier and a
finisher. There are two paper paths. One is the bypass section, which does not
punch paper. The other is the punch path. The punch path can be selected by
pressing the green button on the top of the Stream Punch.
The Stream Punch consists of several input / output devices to operate the machine
functions. The system intelligence is a Microchip micro-controller PIC17C752. The
present code is written in Microchip assembler. The list of I/O devices is:
Refer to the electrical wiring information, when reading the following material.
INPUTS:
Sensor 1 Optical
Sensor 2 Optical
Sensor 3 Optical
Sensor 4 Optical
Sensor 5 Optical
Sensor 6 Optical
Sensor 7 Optical
Sensor 8 Optical
Sensor 9 Optical Vane Monitors rotation of punch mechanism, Controls clutch and brake
Switch 1 Keypad
Switch 2A Mechanical
Switch 2B Mechanical
Switch 3 Mechanical
Switch 4 Mechanical
OUTPUTS:
Diverter DC Solenoid
Brake DC Brake
Clutch DC Clutch
Backstop DC Solenoid
Transport AC Motor
Punch AC Motor
Stepper 1 PWM Signal
Winding
Stepper 2 PWM Signal
Winding
PRINTER COMMUNICATION:
Punch Input
Motor Input
Jam Output
Tray / Output
Die
Starts machine motors, Sheet speed measurement, Jam detect
Stepper 1 control, Sheet speed measurement, Jam detect
Punch mechanism control, Backstop raiser, Jam detect
Jam detect at entrance of U-Channel
Jam detect at exit of U-Channel
Stepper 2 Control, Jam detect
Exit sensor, Jam detect
Bypass sensor, Sheet speed measurement, Jam detect
Selects punch mode
Interlock Voltage, no machine movement if door is open
Door open signal
Chip tray switch
Die Set switch
Diverts paper from bypass to punch sections
Stops the punch mechanism, keeps it in correct position
Clutches the punch mechanism to drive through paper
Provides stop for paper to rest against during punching
Provides paper movement through machine
Provides power to punch the paper
Controls Stepper Motor 1
On / Off signal for stepper holding current
Controls Stepper Motor 2
On / Off signal for stepper holding current
Printer turns on Punch enabled mode (not presently
operational)
Printer turns on Stream Punch Motor
Punch signals a jam or the door is open (no operation
allowed)
Punch indicates tray or die set missing (bypass only
allowed)
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