Sharp AR-FN7 Service Manual page 21

B.Stapling Operation
When stacking and alignment of paper on the processing tray are
complete, the finisher controller PCB drives the paddle motor (FPM) in
the reverse direction and lowers the swing guide. When the swing guide
descends, the paper stack is sandwiched between the upper and lower
stack delivery rollers.
The finisher controller PCB moves the stapler for stapling according to
the specified stapling position (when rear 1-point stapling is specified,
the stapler does not move but it staples at the standby position). As the
stapler moves forward, the processing tray stopper is folded forward.
Paper stack
Swing guide
Delivery tray
Stack
delivery
roller
(lower)
Fig.F02-302-01
Paddle motor (FPM)
Staple safety switch
(SSS)
Swing guide
Stack delivery roller
(upper)
Stack delivery roller
(lower)
Fig.F02-302-02
Stack delivery roller (upper)
Processing tray stopper
Stapler
Swing guide home
position sensor (ARHPS)
Light-shielding plate
AR-FN7/PN1 OPERATIONAL DESCRIPTION 4-8
C.Delivery Operation after Stapling
When stapling is complete, the finisher controller PCB drives the deliver
motor in the forward direction to feed the paper stack (sandwiched
between the stack delivery rollers) in the delivery direction. The delivery
belt home position sensor is turned OFF. The delivery motor is driven a
specified number of pulses, causing the swing guide to ascend. At the
same time, the slide motor is driven to return the stapler back to the
standby position, followed by driving of the delivery motor. Then, the
paper stack is delivered with the nails of the delivery belt that rotates in
sync with the stack delivery rollers.
Paper stack
Delivery tray
Delivery belt
Stack delivery
roller (lower)
Fig.F02-303-01
Paddle motor (FPM)
Staple safety switch
(SSS)
Swing guide
Stack delivery roller
(upper)
Stack delivery roller
(lower)
Fig.F02-303-02
Swing guide
Stapler
Swing guide home
position sensor (ARHPS)
Light-shielding plate