Sharp AR-F12 (serv.man6) Service Manual ▷ View online
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CHAPTER 2 FINISHER UNIT BASIC OPERATION
3) When the leading edge of the sheet has moved past the buffer path paper sensor (PI14), the buffer
roller stops and waits for the second sheet.
First sheet
Second sheet
Buffer path paper
sensor (PI14)
sensor (PI14)
Figure 2-249
4) When the second sheet arrives and its leading edge reaches the inlet sensor (PI1), the buffer roller
starts to operate once again.
Second sheet
Inlet sensor (PI1)
First sheet
Figure 2-250
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CHAPTER 2 FINISHER UNIT BASIC OPERATION
5) The buffer roller continues to rotate, and the second sheet overlaps the first sheet.
First sheet
Second sheet
Figure 2-251
6) When the trailing edge of the second sheet has moved past the buffer path paper sensor (PI14),
the buffer roller stops and waits for the third sheet.
First sheet
Second sheet
Third sheet
Buffer path paper
sensor (PI14)
sensor (PI14)
Figure 2-252
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CHAPTER 2 FINISHER UNIT BASIC OPERATION
7) When the third sheet arrives and its leading edge reaches the inlet sensor (PI1), the buffer roller
starts to operate once again.
First sheet
Second sheet
Third sheet
Inlet sensor (PI1)
Figure 2-253
8) When the leading edge of the third sheet reaches the inlet sensor (PI1), the buffer outlet solenoid
(SL3) turns off so that the path is directed in the direction of delivery. (The actual switch-over
will occur after the trailing edge of the first sheet has moved past the flapper.)
will occur after the trailing edge of the first sheet has moved past the flapper.)
OFF
SL3
Buffer outlet
solenoid
solenoid
First sheet
Second sheet
Third sheet
Inlet sensor (PI1)
Figure 2-254
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CHAPTER 2 FINISHER UNIT BASIC OPERATION
9) The buffer roller continues to rotate, the third sheet overlaps the first and second sheets, and the
three sheets are fed together towards the delivery roller.
Figure 2-255
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