Stapler Unit - Sharp AR-FN8 Service Manual

CHAPTER 2 FINISHER UNIT BASIC OPERATION
F.

Stapler Unit

Stapling is executed by the stapler motor (M6). A single rotation of the cam by the motor
results in one stapling operation.
The cam is checked by the stapling home position sensor (PI22) to find out whether it is at the
home position.
The stapler motor is controlled by the microprocessor (Q1) on the finisher controller to enable
it to be rotated clockwise or counterclockwise.
When the stapling home position sensor is off, the finisher controller PCB rotates the stapler
motor clockwise until the sensor is turned on so as to return the stapling cam to its initial state.
The presence/absence of staples inside the staple cartridge is detected by the staple switch
(MS8).
The finisher controller PCB does not drive the stapler motor (M6) unless the swing guide
closed detecting switch 2 (MS6) is on (i.e., the swing guide is closed). This is to guard against
injuries that could occur when a finger is stuck inside the stapler.
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