2-/3-Hole Dual Use Type - Sharp AR-FN8 Service Manual

2.

2-/3-hole Dual Use Type

At the home position, the punch home position sensor is ON. To punch two holes, punching of
the first sheet ends when the punch shaft half peripheral area has rotated in the forward direction
180°, and the state of the punch home position sensor has changed from OFF to ON. At this time,
the 3-hole puncher is moved reciprocally in the escape direction (hole puncher rise direction) on
the remaining half peripheral area on the punch shaft. Punching of the second sheet ends when the
punch shaft half peripheral area has rotated in the reverse direction 180°, and the state of the punch
home position sensor has changed from OFF to ON. Also at this time, the 3-hole puncher is moved
reciprocally in the escape direction (hole puncher rise direction) on the remaining half peripheral
area on the punch shaft. To punch three holes, the 2-hole puncher is moved reciprocally in the
escape direction (hole puncher rise direction).
The following illustrates punching when two sheets are punched with two holes.
1) A hole is punched in the trailing edge of the first sheet.
Punch home
position
sensor
When two holes are punched, the 3-hole puncher is fed reciprocally in the escape direction
(hole puncher rise direction) as shown below.
[punch shaft stopped/
home position]
CHAPTER 4 PUNCHER UNIT (OPTION) BASIC OPERATION
Sensor flag
(PI3P)
Punch shaft
Eccentric
Hole
cam
puncher
Die
Sheet
Die
[punch shaft stopped/ [punch shaft is rotated 90˚
home position] in the forward direction/
hole punched]
Figure 4-204
[punch shaft is rotated 90˚
in the forward direction/
hole puncher rises to
topmost position]
Figure 4-205
Punched scrap
[punch shaft is rotated 180˚
in the forward direction/
punch operation completed]
[punch shaft is rotated 180˚
in the forward direction/
hole puncher returns to
original position]
4-9