Sharp AR-F11 (serv.man3) Service Manual ▷ View online
2-32
CHAPTER 2 FINISHER UNIT BASIC OPERATION
F.
Stapler Unit
Stapling is executed by the staple motor (M6). A single rotation of the cam by the motor results in
one stapling operation.
The cam is checked by the staple home position sensor (PI22) to find out whether it is at the home
position.
The stapler motor is controlled by the microprocessor (IC1) on the finisher controller so that it is
rotated clockwise or counterclockwise.
When the stapling home position sensor is off, the finisher controller PCB rotates the stapler
motor clockwise until the sensor turns on so as to return the stapling cam to its initial state.
The presence/absence of the staple cartridge is detected by the staple switch (MS8). The pres-
ence/absence of staples inside the staple cartridge is detected by the staple detecting switch (MS9).
The staple edge sensor (PI21) is used to find out whether a staple has been edged out to the end of the
cartridge.
The staple edge sensor (PI21) is used to find out whether a staple has been edged out to the end of the
cartridge.
The finisher controller PCB does not drive the staple motor (M6) unless the swing guide closed
detecting switch 2 (MS6) is on (i.e., the swing guide is closed). This is to protect against injuries that
could occur when a finger is stuck inside the stapler.
could occur when a finger is stuck inside the stapler.
2-33
CHAPTER 2 FINISHER UNIT BASIC OPERATION
Figure 2-232
Staple edge detection signal
Staple motor dri
v
e
signal
Stapling home
position detection signal
Cartridge detection signal
Staple detection signal
Finisher controller PCB
M6
Figure 2-233
2-34
CHAPTER 2 FINISHER UNIT BASIC OPERATION
Start signal
Host machine delivery signal
First sheet Stacking Second sheet Stapling Delivery
Delivery motor (M2)
First feed motor (M1)
Inlet feed motor (M9)
Second feed motor (M8)
Inlet sensor (PI1)
Delivery sensor (PI3)
Alignment motor (M3)
Alignment guide home
Alignment guide home
position sensor (PI6)
Swing guide open
sensor (PI18)
Stapling tray sensor (PI4)
Swing guide closed
detecting switch 1 (MS2)
Paddle solenoid (SL5)
Paddle solenoid (SL5)
Stapler shift motor (M4)
Staple motor (M6)
Belt escape solenoid
(SL7)
Staple home position
sensor (PI22)
: Motor CW rotation
: Motor CCW rotation
Figure 2-234
2-35
CHAPTER 2 FINISHER UNIT BASIC OPERATION
5.
Shifting the Stapler Unit
The stapler unit is moved by the stapler shift motor (M4). Its home position is detected by the
stapler shift home position sensor (PI7). When the start signal arrives from the host machine, the
stapler moves to the center of its movement range. This movement occurs regardless of the selected
mode of delivery, as no specific mode is recognized at this point in time. When the command for
stapling arrives from the host machine after the first sheet has reached the host machine pre-registra-
tion sensor, the stapler moves to the staple wait position to suit the appropriate stapling position and
paper size.
stapler moves to the center of its movement range. This movement occurs regardless of the selected
mode of delivery, as no specific mode is recognized at this point in time. When the command for
stapling arrives from the host machine after the first sheet has reached the host machine pre-registra-
tion sensor, the stapler moves to the staple wait position to suit the appropriate stapling position and
paper size.
See Figures 2-235 and later for an idea of the wait position according to the stapling mode.
a.
Front Diagonal Stapling
The position is the same as the stapling position.
Stapling tray delivery
direction
direction
Stopper
Stopper
Guide plate
Stapler
Figure 2-235
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