4. The hole punch home position sensor turns on and the hole punching operation in the second
sheet is completed.
Punch shaft stops:
Home position for 3-hole
Punch a hole in the second sheet
Punch shaft turns 90 degrees ccw.:
Operates 2-hole punching
Punch shaft turns 180 degrees cw.:
Punching operation is completeed
When operating 3-hole punching in 2 sheets of paper, the hole punch shaft for 3-hole punching
is rotated 180 degrees counter clockwise from its home position and then 180 degrees
clockwise.
Hole punching operation (2-hole/4-hole hole puncher assembly)
The 2-hole/4-hole puncher assembly punches 2 holes or 4 holes in the trailing edge of paper. Four
off-centering cams are on the punch shaft; two off-centering cams with punch for 2-hole punching and
two off-centering cams with punch for outside 4-hole punching. The sensor flag is also on the hole
punch shaft, and the hole punch home position sensor detects the home position of the hole punch
shaft. When the hole punch shaft is at home position, the hole punch home position sensor is turned
on. The hole punch motor clock sensor counts the clock pulse of hole punch motor by the encoder on
the shaft so that the hole punch controller stops the punch motor at its home position. Accordingly the
hole punch shaft stops at either home position for 2-hole punching or 4-hole punching. A punching of
2-hole is operated by turning the hole punch shaft 180 degrees from its home position. A punching of
4-hole is operated by turning the hole punch shaft 360 degrees from its home position first to punch
inside 2 holes and then outside 2 holes. The hole punch chips are collected into the punch chip box.
The punch chip box full sensor detects if the box is filled with hole punch chips.
Operational sequence of the hole punching operation for 4-hole punching in a sheet of paper is as
follows:
1. The hole punch controller drives the hole punch motor to rotate the hole punch shaft 90 degrees
clockwise.
2. Inside 2 holes punching is operated.
3. The hole punch controller drives the hole punch motor to rotate the hole punch shaft 180
degrees clockwise.
4. The hole punch home position sensor turns on and inside 2 holes punching operation is
completed.
5. The hole punch controller drives the hole punch motor to rotate the punch shaft 270 degrees
clockwise.
ENWW Stapler/stacker and stapler/stacker with hole punch 149
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