Sharp AR-F11 (serv.man3) Service Manual ▷ View online
2-40
CHAPTER 2 FINISHER UNIT BASIC OPERATION
H.
Detecting the Height of Stack on the Tray
1.
Outline
The number of sheets delivered to the tray and the number of sets (number of stapling operations)
are stored in memory by the finisher controller PCB. The height of the stack is checked by the height
sensor (PS1). See Table 2-204 for the maximum loading capacity of each tray.
sensor (PS1). See Table 2-204 for the maximum loading capacity of each tray.
The finisher controller PCB stops operation when the conditions in Table 2-204 occur, informing
the host machine that the tray is full.
Stacking
mode
Height
Small-size
250 mm
high
(2000 sheets)
high
(2000 sheets)
Large-size
140 mm
high
(1000 sheets)
high
(1000 sheets)
Small-size
110 mm high
(750 sheets/
50 sets)
(750 sheets/
50 sets)
Non-staple sort
Staple sort
Mixed sizes
74 mm high
(500 sheets)
(500 sheets)
Large-size
74 mm high
(500 sheets/
50 sets)
(500 sheets/
50 sets)
Mixed sizes
22 mm high
(500 sheets/
50 sets)
(500 sheets/
50 sets)
Notes: 1.
The capacity for the non-staple sort mode is approximate and computed based on 80 g/m
2
paper.
2.
Alignment for stacks containing 750 sheets or more is not guaranteed.
3.
Stacking height precision is ±7 mm.
Caution:
1. The term “small-size” stands for A4, LT, and B5.
2. The term “large-size” stands for A3, A4-R, B4, LG, LD, LT-R, FOLIO and
2. The term “large-size” stands for A3, A4-R, B4, LG, LD, LT-R, FOLIO and
COMPUTER.
Table 2-204
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CHAPTER 2 FINISHER UNIT BASIC OPERATION
Height sensor (PS1)
Paper
Figure 2-240
2-42
CHAPTER 2 FINISHER UNIT BASIC OPERATION
I.
Shutter Operation
When the tray 1 passes the delivery slot, the finisher controller PCB closes the shutter mounted
on the delivery slot before moving the tray, preventing the existing stack on the tray by the delivery
slot and intrusion of the hands.
slot and intrusion of the hands.
The shutter moves up (to close) when the second feed motor (M8) rotates counterclockwise, and
is held in position when the motor stops. When the second feed motor rotates counterclockwise once
again, it moves down (to open) to enable delivery.
again, it moves down (to open) to enable delivery.
When the shutter is held at the up position, claws slide out of the swing guide to engage the back
of the shutter. This way, the existing slack and the swing guide engage while the tray is moved,
preventing the guide from opening. The claws slide in when the shutter is moved down to release the
engagement.
preventing the guide from opening. The claws slide in when the shutter is moved down to release the
engagement.
The upward movement of the shutter is monitored by the shutter closed detecting switch (MS4),
and the downward movement is monitored by the shutter open sensor (PI5).
See the following diagrams for how these operations take place.
1) The second feed motor rotates counterclockwise to move the shutter up.
M8
Second feed motor
Figure 2-241
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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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