6. Outside 2 holes punching is operated.
7. The hole punch controller drives the punch motor to rotate the hole punch shaft 360 degrees
clockwise.
8. The hole punch home position sensor turns on and outside 2 holes punching operation is
completed.
Figure 1-110 Operation of 4-hole punching
Punch shaft
Punch home position sensor
Sensor flag
Off-centering cam
for inside 2-hole
Punch
Paper
Encoder
Punch motor clock sensor
Operation of 4-hole punchin>
Punch chip
Off-centering cam
for outside 2-hole
Punch shaft stops:
Home position for inside 2-hole
Punch shaft turns 90 degrees cw.:
Operates inside 2-hole punching
Punch shaft turns 180 degrees cw.:
Inside punching operation is completed
Punch shaft turns 360 degrees cw.:
Outside punching operation is completed
Punch shaft turns 270 degrees cw.:
Operates outside 2-hole punching
150 Chapter 1 Theory of operation ENWW
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