Read Sharp AR-F12 (serv.man5) Service Manual online
4-9
CHAPTER 4 PUNCHER UNIT (OPTION) BASIC OPERATION
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 recip-
rocally 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 direc-
tion (hole puncher rise 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 recip-
rocally 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 direc-
tion (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 shaft stopped/
home position]
home position]
[punch shaft is rotated 90˚
in the forward direction/
hole punched]
in the forward direction/
hole punched]
[punch shaft is rotated 180˚
in the forward direction/
punch operation completed]
in the forward direction/
punch operation completed]
Sensor flag
Punch home
position
sensor
position
sensor
(PI3P)
Punch shaft
Eccentric
cam
cam
Hole
puncher
puncher
Die
Die
Sheet
Punched scrap
Figure 4-204
When two holes are punched, the 3-hole puncher is fed reciprocally in the escape direction (hole
puncher rise direction) as shown below.
puncher rise direction) as shown below.
[punch shaft stopped/
home position]
home position]
[punch shaft is rotated 90˚
in the forward direction/
hole puncher rises to
topmost position]
in the forward direction/
hole puncher rises to
topmost position]
[punch shaft is rotated 180˚
in the forward direction/
hole puncher returns to
original position]
in the forward direction/
hole puncher returns to
original position]
Figure 4-205
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