Sharp AR-F12 (serv.man6) Service Manual ▷ View online
2-43
CHAPTER 2 FINISHER UNIT BASIC OPERATION
2) The tray 1,2 lift motor rotates, and the new tray moves to the stacking lower limit. The distance
of movement is detected by the tray 1 lift motor clock sensor 1/2 (PI9/19) or tray 2 lift motor
clock sensor 1/2 (PI22/PI24).
clock sensor 1/2 (PI22/PI24).
Tray 2 lift motor
M10
M5
Tray 1 lift motor
Figure 2-242
3) The second feed motor rotates counterclockwise, and the shutter moves down.
M8
Second feed motor
Figure 2-243
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CHAPTER 2 FINISHER UNIT BASIC OPERATION
4) The tray lift motor rotates, and the tray moves to suit the height of the stack. The appropriate
height in relation to the existing stack is checked by the height sensor (PS1).
Tray 2 lift motor
Height sensor (PS1)
M10
Figure 2-244
M8
Claw
Shutter closed
detecting
switch (MS4)
detecting
switch (MS4)
Shutter open
sensor (PI5)
sensor (PI5)
Shutter
Claw
One-way cam
Second feed motor
Figure 2-245
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CHAPTER 2 FINISHER UNIT BASIC OPERATION
Sequence Operations (shutter drive)
Move from Tray 1 to Tray 2
Second feed motor (M8)
Shutter
closed
closed
Tray moved
Shutter
opened
opened
Tray 1 lift motor (M5)
Tray 2 lift motor (M10)
Shutter closed detecting
switch (MS4)
switch (MS4)
Shutter open
sensor (PI5)
sensor (PI5)
Height sensor (PS1)
Correct height detected
Motor CW rotation
Motor CCW rotation
Figure 2-246
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CHAPTER 2 FINISHER UNIT BASIC OPERATION
J.
Buffer Path Operation
1.
Outline
This machine is provided with a buffer paper path for continuously receiving paper from the host
machine during stapling and job offset operation on the stapling tray. A maximum of three copies
(three originals or more in the staple mode) are wrapped around the buffer roller. During this time, job
offset and stapling are performed on the stapling tray.
(three originals or more in the staple mode) are wrapped around the buffer roller. During this time, job
offset and stapling are performed on the stapling tray.
The following shows operation on the buffer paper path.
1) When the first sheet arrives, the buffer inlet solenoid (SL2) remains off. The first sheet enters the
buffer path.
OFF
SL2
First sheet
Buffer inlet solenoid
Figure 2-247
2) When the leading edge of the sheet has moved past the buffer path inlet paper sensor (PI17), the
buffer outlet solenoid (SL3) turns on so as to cause the sheet to wrap around the buffer roller.
ON
SL3
Buffer outlet
solenoid
solenoid
Buffer path inlet paper
sensor (PI17)
sensor (PI17)
Figure 2-248
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