Sharp AR-M35 / AR-M450 (serv.man8) Service Manual ▷ View online
AR-350/450 BASIC PAPER TRANSPORT PATH AND PAPER EXIT 3-11
a. Stapler Movement Controller
The stapler unit is moved by the slide motor (FSM). Its home position is
detected by the slide home position sensor (SHPS). The stapler waits at
detected by the slide home position sensor (SHPS). The stapler waits at
the back irrespective of the staple mode and paper size. After paper has
been stacked on the processing tray, the stapler is moved to the specified
stapling position in response to the stapling command from the host
stapling position in response to the stapling command from the host
machine.
The figure below shows the standby position of the stapler and the
stapling position depending on the staple mode.
stapling position depending on the staple mode.
<1>Front 1-point stapling
The stapler waits at the back. The stapler moves to and returns from the
stapling position for each stapling operation.
<2>Rear 1-point stapling
The stapler waits at the back. The stapling position is the same as the
standby position.
<3>Middle 2-point stapling
The stapler waits at the back. The stapler moves to and returns from the
stapling position for each stapling operation. The stapler first staples a
paper stack at the rear stapling position and then staples it at the front
stapling position.
stapling position.
<4>Middle 2-point stapling (bind mode)
The stapler waits at the back. The stapler moves to and returns from the
stapling position for each stapling operation. The stapler first staples a
stapling position for each stapling operation. The stapler first staples a
paper stack at the rear stapling position and then staples it at the front
stapling position.
Stapling Operation Sequence
Rear 1-point Stapling of 2 Sheets
Feed direction
Stapling position
Stopper
Stapler
Standby position
Feed direction
Stapler
Stopper
Standby position
Stabling position
Stabling position
Feed direction
Standby position
Stapler
Stapling position
Stopper
Stapling position
Feed direction
Standby position
Stapler
Stopper
Stapling position
Stapling position
Host machine delivery signal
Start signal
Inlet sensor (ES)
Processing tray sensor
(AS)
(AS)
Feed motor (FFM)
Delivery motor (FAM)
Paddle motor (FPM)
Paddle home position
sensor (PHPS)
sensor (PHPS)
Swing guide home
position sensor (ARHPS)
position sensor (ARHPS)
Stapler safety switch
(SSS)
(SSS)
Alignment motor (front)
(FFJM)
(FFJM)
Aligning plate home position
sensor (front) (FJHPS)
sensor (front) (FJHPS)
Staple/fold motor
(FFSM)
(FFSM)
Staple home position
sensor (STHPS)
sensor (STHPS)
CW rotation
CCW rotation
Delivery belt home
position sensor (OBHPS)
position sensor (OBHPS)
360msec
10msec
20msec
360msec
Stack delivery
Staple
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AR-350/450 BASIC PAPER TRANSPORT PATH AND PAPER EXIT 3-12
C. Delivery Tray Operation
(1) Outline
The machine has a delivery tray in the finisher unit and a bind tray in the
saddle unit.
saddle unit.
The bind tray in the saddle unit is of the fixed type and all the folded
paper stacks are delivered to this tray. This tray has a bind tray sensor
(FES) to detect presence/absence of paper.
(FES) to detect presence/absence of paper.
The delivery tray in the finisher unit is moved up and down using a shift
motor (FLM).
The finisher has a tray paper sensor (BES) to detect presence/absence
The finisher has a tray paper sensor (BES) to detect presence/absence
of paper on the stack tray.
The home position sensor of the delivery tray is detected by the paper
surface sensor (STHPS). When paper has already been stacked on the
surface sensor (STHPS). When paper has already been stacked on the
delivery tray, the home position is on the top surface of the stacked
paper. When paper has not yet been stacked on the delivery tray, the
home position is at the position where the edge of the delivery tray is
home position is at the position where the edge of the delivery tray is
detected. At power-on, the finisher controller PCB drives the shift motor
(FLM) to return the delivery tray to the home position.
When the paper coming from the processing tray is stacked on the
When the paper coming from the processing tray is stacked on the
delivery tray, the shift motor is driven a specified number of pulses,
causing the delivery tray to descend. Clock pulses are detected by the
shift motor clock sensor (LE). Then, the delivery tray returns to the home
shift motor clock sensor (LE). Then, the delivery tray returns to the home
position for the next stacking operation.
The upper limit of the delivery tray is detected by the shift upper limit
sensor (ULS). When the shift upper limit sensor (ULS) is turned ON, the
sensor (ULS). When the shift upper limit sensor (ULS) is turned ON, the
finisher controller PCB stops the shift motor (FLM) that is ascending.
The lower limit of the delivery tray is detected by the shift lower limit
sensor (LLLS). When the shift lower limit sensor (LLLS) is turned ON,
sensor (LLLS). When the shift lower limit sensor (LLLS) is turned ON,
the finisher controller PCB stops the shift motor (FLM) that is
descending.
The finisher unit has a full stack sensor (PI24) to detect overstacking of
The finisher unit has a full stack sensor (PI24) to detect overstacking of
large-size or mixed paper according to the stack height.
D. Saddle Unit
(1) Basic Operations
a. Outline
The machine stitches a stack of sheets (middle 2-point), then folds the
stack in two in the finisher. These operations are controlled by the
stack in two in the finisher. These operations are controlled by the
finisher controller PCB.
The finisher controller PCB is controlled by the commands from the host
machine.
machine.
(2) Feed/Drive System
a. Outline
This machine stitches the paper stack coming from the finisher, folds it,
and delivers it to the bind tray in the saddle unit in response to the
commands from the host machine.
That is, the machine performs the following operations:
That is, the machine performs the following operations:
a) Paper feed-in
b) Stitching
c)
Stack feed
d) Folding/delivery
Tray paper sensor (BES)
Shift motor (FLM)
Shift motor clock sensor
(LE)
Shift lower limit sensor
(LLLS)
Full stack sensor (XXXX)
Shift upper limit sensor
(ULS)
Delivery tray
Paper surface sensor (SLS)
Edge
a) Paper feed-in
b) Stitching
c) Stack feed
d) Folding/delivery
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AR-350/450 BASIC PAPER TRANSPORT PATH AND PAPER EXIT 3-13
<1>Paper feed-in
After being aligned on the processing tray, a stack of sheets is
sandwiched between the stack delivery rollers. As the stack delivery
sandwiched between the stack delivery rollers. As the stack delivery
rollers rotate, the stack is fed toward the saddle unit.
<2>Stitching
When the center of the paper stack (stitching position) reaches the
stapler's staple position, the stapler stitches the paper stack.
When only one sheet is fed from the host machine, the next step (stack
When only one sheet is fed from the host machine, the next step (stack
feed) is performed without performing the stitching operation.
<3>Stack feed
The stack feed rollers feed the paper stack to the stack folding/delivery
position where the center of the stack (stitched position) is level with the
position where the center of the stack (stitched position) is level with the
paper pushing plate and paper folding roller's nip part.
<4>Folding/delivery
The paper pushing plate pushes in the center of the paper stack to feed it
toward the paper fold rollers. Then, the paper fold rollers and bind
toward the paper fold rollers. Then, the paper fold rollers and bind
delivery rollers deliver the paper stack to the bind tray.
Stack delivery roller (upper)
Paper stack
Stack delivery roller
(lower)
Staple
Stapler (lower)
Stapler (upper)
Paper fold roller
Paper pushing plate
Stack feed roller (upper)
Stack feed roller (lower)
Paper fold rollers
Bind delivery rollers
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AR-350/450 BASIC PAPER TRANSPORT PATH AND PAPER EXIT 3-14
(3) Paper Feed System
a. Outline
The paper feed system feeds a stack of sheets (coming from the finisher)
to the position where the center of the paper stack (stitching position) is
aligned to the stapler's staple, allowing the next step (stitching and
aligned to the stapler's staple, allowing the next step (stitching and
folding) to be performed.
When sheets of paper have been stacked and aligned on the processing
tray, the paddle motor (FPM) rotates in the reverse direction, causing the
tray, the paddle motor (FPM) rotates in the reverse direction, causing the
swing guide to descend. As the swing guide descends, the paper stack
is sandwiched between the upper and lower stack delivery rollers. The
delivery motor (FAM) rotates in the reverse direction, feeding the paper
delivery motor (FAM) rotates in the reverse direction, feeding the paper
stack toward the saddle unit. When the leading edge of the paper stack
reaches the folding position sensor (FPS), the finisher controller PCB
drives the delivery motor a specified number of motor pulses to stop the
drives the delivery motor a specified number of motor pulses to stop the
center of the paper stack (stitching position) at the stapler's staple
position. Before the paper stack passes through the stack feed rollers,
the feed motor (FFM) is driven to rotate the stack feed roller (lower) so
the feed motor (FFM) is driven to rotate the stack feed roller (lower) so
that the leading edge of the paper stack is not bent.
<4>Stack Feed System
a. Outline
The stack feed system feeds the stitched paper stack to the folding
position.
position.
When stitching is complete, the feed motor (FFM) rotates, causing the
stack feed roller (upper) to descend. The paper stack is sandwiched
between the stack feed rollers. Then, the bind clutch (FFC) is turned ON
between the stack feed rollers. Then, the bind clutch (FFC) is turned ON
to rotate the feed motor (FFM) in the forward direction, thus feeding the
paper stack to the folding position. The feed amount is equivalent to the
number of pulses used to drive the feed motor (FFM) until the paper
number of pulses used to drive the feed motor (FFM) until the paper
stack reaches the folding position.
(5) Fold/Delivery System
a. Outline
The paper fold mechanism consists of a guide plate, paper fold rollers,
and a paper pushing plate.
and a paper pushing plate.
The guide plate, paper fold rollers, and paper pushing plate are driven by
the staple/fold motor (FFSM). The drive force is transferred with a
combination of gears and cams. Motor operation is monitored by the
combination of gears and cams. Motor operation is monitored by the
staple/fold motor lock sensor (FE).
Until the paper stack reaches the folding position, the guide plate covers
the paper fold rollers to act as a paper path through which a paper stack
the paper fold rollers to act as a paper path through which a paper stack
is fed to the saddle unit and to prevent a paper stack from touching the
rollers.
A folding home position sensor (FHPS) is provided to detect the
A folding home position sensor (FHPS) is provided to detect the
positions of the paper fold rollers and paper pushing plate.
The paper stack folded in two by the paper fold rollers is delivered by
bind delivery rollers.
bind delivery rollers.
The bind delivery rollers are also driven by the staple/fold motor (FFSM).
A bind tray sensor (FES) is provided on the bind tray to detect presence/
absence of a paper stack; however, it is not used to detect a jam.
absence of a paper stack; however, it is not used to detect a jam.
Stack delivery roller (upper)
Paper stack
Stack delivery roller
(lower)
Stack feed roller (lower)
Fold position sensor
Stack feed roller (upper)
Stack feed roller (lower)
Feed amount
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