Sharp MX-FNX3 / MX-FNX4 Service Manual ▷ View online
MX-FNX4 OPERATIONAL DESCRIPTION 5 – 14
[Paper folding start position]
[Paper folding roller stop position]
N. Double folding a stack (MX-FNX4)
To fold a stack consisting of 10 or more A4-R or LTR-R sheets, fold-
ing is executed twice for the same sheet.
The paper folding rollers rotate in reverse for an equivalent of 20
mm after gripping the stack for a length of 20 mm, enabling the
paper folding rollers to apply an increased degree of pressure
along the crease on the stack. Then, the paper folding rollers rotate
normally, and the paper pushing plate returns to its home position
while the stack is being delivered.
This way, a stack requiring a large force may properly be folded
with less pressure.
1)
ing is executed twice for the same sheet.
The paper folding rollers rotate in reverse for an equivalent of 20
mm after gripping the stack for a length of 20 mm, enabling the
paper folding rollers to apply an increased degree of pressure
along the crease on the stack. Then, the paper folding rollers rotate
normally, and the paper pushing plate returns to its home position
while the stack is being delivered.
This way, a stack requiring a large force may properly be folded
with less pressure.
1)
The paper pushing plate pushes the stack in the direction of
the paper folding rollers.
the paper folding rollers.
2)
The paper folding rollers grip the stack for a length of about 20
mm.
mm.
3)
The paper folding rollers rotate in reverse, pushing back the
stack for a length of about 20 mm (reverse feeding).
stack for a length of about 20 mm (reverse feeding).
Deliveryoutlet
Stackofsheets
Paperpushingplate
Paperfeedinlet
Sensorflag
Paper folding home
position sensor (FSFOHPD)
Paperisfolded/fed.
Paperisfed.
Deliveryoutlet
Paperfeedinlet
Paper folding home
position sensor (FSFOHPD)
Sensorflag
Paperisfolded/fed.
Paperisfed.
Paperisfed.
Paper folding motor (FSFOM)
Paper pushing plate
motor (FSLGM)
Paper pushing plate home
position sensor (FSLGHPD)
Paper pushing plate top
position sensor (FSLGTD)
Delivery sensor (FSPDD)
Tray paper sensor (FSTPD)
Paper folding home position
sensor (FSFOHPD)
Equivalent of 10mm by paper folding motor
: Motor CW
: Motor CCW
Paper folding motor
Paper folding roller
Paper pushing
roller
Paper pushing plate
motor
FS
FOM
FS
LGM
20mm
(approx.)
Paper folding motor
FS
FOM
20mm
(approx.)
Paper folding motor
FS
FOM
MX-FNX4 OPERATIONAL DESCRIPTION 5 – 15
4) The paper folding rollers rotate again, feeding out the stack.
The paper pushing plate returns to its home position.
3. Intermediate stapling tray
A. Job offset
In the job offset mode, paper is shifted to the front or back by the
stack for delivery, and the stacks are sorted.
The paper delivered to the stapling tray is moved forward or back-
ward by the front alignment plate and the back alignment plate. The
aligned paper is stapled or discharged in accordance with the sig-
nals from the host machine. The finisher controller PCB drives the
alignment plate front motor (FFJM) and the alignment plate back
motor (FRJM) at power-on to return the two alignment plates to
their home positions.
Designations and functions of the motors and sensors to be used in
the stack job offset mode are shown below.
stack for delivery, and the stacks are sorted.
The paper delivered to the stapling tray is moved forward or back-
ward by the front alignment plate and the back alignment plate. The
aligned paper is stapled or discharged in accordance with the sig-
nals from the host machine. The finisher controller PCB drives the
alignment plate front motor (FFJM) and the alignment plate back
motor (FRJM) at power-on to return the two alignment plates to
their home positions.
Designations and functions of the motors and sensors to be used in
the stack job offset mode are shown below.
B. Stacking paper on stapling tray
After the trailing edge of paper passes through the first delivery
roller, the paper is delivered to the stapling tray by the delivery roller
and the return roller until it buts against the stapling tray stopper.
roller, the paper is delivered to the stapling tray by the delivery roller
and the return roller until it buts against the stapling tray stopper.
C. Offset operation
The front alignment plate or the back alignment plate shifts the
sheet delivered to the front or back. The offset operation is carried
out whenever paper is drawn into the stapling tray.
sheet delivered to the front or back. The offset operation is carried
out whenever paper is drawn into the stapling tray.
Paper folding motor
Paper pushing
plate motor
FS
FOM
FS
LGM
Equivalent of 20 mm
Gripping of paper stack
Equivalent of 20 mm
(reverse feeding)
Paper folding motor (FSFOM)
Paper pushing plate motor (FSLGM)
Paper pushing plate home position sensor (FSLGHPD)
Paper pushing plate home position sensor (FSLGHPD)
Paper pushing plate top position sensor (FSLGTD)
Delivery sensor (FSPDD)
Delivery sensor (FSPDD)
Tray paper sensor (FSTPD)
Paper folding home position sensor (FSFOHPD)
:Motor CW
:Motor CCW
Alignment front home
position sensor (FFJHPD)
Front alignment
plate
Alignment back home
position sensor (FRJHPD)
Shielding plate
Back alignment
plate
Paper
Alignment plate back motor
(FRJM)
Alignment plate front motor (FFJM)
(Front)
Shielding plate
Results of Delivering 4sets job offset
4th set
2nd set
3rd set
1st set
Delivery direction
Motor
Function
Alignment plate front motor
(FFJM)
(FFJM)
Aligns paper in stapling tray at front
Alignment plate back motor
(FRJM)
(FRJM)
Aligns paper in stapling tray at back
Swing motor (FSWM)
Raises or lowers swing guide
Trailing edge assist motor
(FASM)
(FASM)
Delivers trailing edge of paper stack
Sensor
Function
Swing guide home position
sensor (FSWHPD)
sensor (FSWHPD)
Detects home position of swing guide
Alignment plate front home
position sensor (FFJHPD)
position sensor (FFJHPD)
Detects home position of alignment front
plate
plate
Alignment plate back home
position sensor (FRJHPD)
position sensor (FRJHPD)
Detects home position of alignment back
plate
plate
Trailing edge assist home
position sensor (FASHPD)
position sensor (FASHPD)
Detects home position of trailing edge
assist
assist
Stack delivery
roller
No.1 delivery roller
Return roller
Stapling tray stopper
Back alignment plate
Offset sheet
Front alignment plate
Tray
MX-FNX4 OPERATIONAL DESCRIPTION 5 – 16
D. Trailing edge assist operation
When paper stacks are delivered, the trailing edge assist guide is
used to support the trailing edge of the stacks as well as the deliv-
ery roller for improvement in performance of stacking of paper
delivered to the stapling tray.
used to support the trailing edge of the stacks as well as the deliv-
ery roller for improvement in performance of stacking of paper
delivered to the stapling tray.
E. Delivery operation
The delivery is implemented whenever three sheets *1 of large size
paper or four sheets *2 of small size paper are offset on the stapling
tray.
As the swing motor runs, the swing guide is lowered. Then, paper
stack is caught between the upper and lower delivery rollers, and
delivered by the delivery roller and the trailing edge assist guide.
The trailing edge guide is stopped when it reaches the predefined
position, and returned with the reverse rotation of the trailing edge
assist motor. Then, the delivery motor runs continuously, and the
paper stack is delivered by the upper and the lower delivery rollers.
paper or four sheets *2 of small size paper are offset on the stapling
tray.
As the swing motor runs, the swing guide is lowered. Then, paper
stack is caught between the upper and lower delivery rollers, and
delivered by the delivery roller and the trailing edge assist guide.
The trailing edge guide is stopped when it reaches the predefined
position, and returned with the reverse rotation of the trailing edge
assist motor. Then, the delivery motor runs continuously, and the
paper stack is delivered by the upper and the lower delivery rollers.
* Depends on the number of originals (Ranges from two minimally
to four maximally. For example, if number of originals is ten,
paper stacks are delivered in the following sequence: 3 sheets, 3
sheets, 4 sheets)
paper stacks are delivered in the following sequence: 3 sheets, 3
sheets, 4 sheets)
* Depends on the number of originals (Ranges from two minimally
to six maximally. For example, if number of originals is seven,
paper stacks are delivered in the following sequence: 6 sheets, 1
sheets)
paper stacks are delivered in the following sequence: 6 sheets, 1
sheets)
4. Staple operation
A. Outline
This machine incorporates two stapler units. The stapler unit in the
finisher staples at one point in the front, one point at the back, or
two points. The stitcher unit in the saddle stitcher staples at two
points in the center of paper stack.
finisher staples at one point in the front, one point at the back, or
two points. The stitcher unit in the saddle stitcher staples at two
points in the center of paper stack.
B. Stapler unit
Stapling is executed by the staple motor (FFSM). A single rotation
of the cam by the motor results in one stapling operation. The cam
is checked by the staple home position sensor (FSHPD) to find out
whether it is at the home position.
The stapler motor is controlled by the microprocessor (IC2) on the
finisher controller PCB so that it is rotated clockwise or counter-
clockwise.
When the stapling home position sensor is off, the finisher control-
ler PCB rotates the stapler motor clockwise until the sensor turns
on so as to return the stapling cam to its initial state.
The presence/absence of the staple cartridge and the presence/
absence of staples inside the staple cartridge are detected by the
staple sensor (FSD).
The staple edge sensor (FSTD) is used to find out whether a staple
has been edged out to the end of the cartridge.
The finisher controller PCB does not drive the staple motor (FFSM)
unless the staple safety switch (FSAD) is on. This is to protect
against injuries that could occur when a finger is stuck inside the
stapler.
of the cam by the motor results in one stapling operation. The cam
is checked by the staple home position sensor (FSHPD) to find out
whether it is at the home position.
The stapler motor is controlled by the microprocessor (IC2) on the
finisher controller PCB so that it is rotated clockwise or counter-
clockwise.
When the stapling home position sensor is off, the finisher control-
ler PCB rotates the stapler motor clockwise until the sensor turns
on so as to return the stapling cam to its initial state.
The presence/absence of the staple cartridge and the presence/
absence of staples inside the staple cartridge are detected by the
staple sensor (FSD).
The staple edge sensor (FSTD) is used to find out whether a staple
has been edged out to the end of the cartridge.
The finisher controller PCB does not drive the staple motor (FFSM)
unless the staple safety switch (FSAD) is on. This is to protect
against injuries that could occur when a finger is stuck inside the
stapler.
Back alignment plate
Offset sheet
Front alignment plate
Tray
Traling edge assist
home position sensor (FASHPD)
Paper
Stapling tray stopper
Trailing edge assist guide
Trailing edge assist motor (FASM)
Stapling tray stopper
Stack delivery roller
Swing guide
Return roller
Trailing edge assist
guide
Stapler unit
Stitcher
unit
(Front/back)
MX-FNX4 OPERATIONAL DESCRIPTION 5 – 17
C. Shifting the stapler unit
The stapler unit is moved by the stapler shift motor (FSM). Its home
position is detected by the stapler shift home position sensor
(FSTHPD). When the staple signal arrives from the host machine,
the stapler moves to the staple wait position appropriate for staple
position and the paper size. See the figures shown below for an
idea of the wait position according to the stapling mode.
Front 1-Point Stapling
The wait position is the same as the stapling position.
position is detected by the stapler shift home position sensor
(FSTHPD). When the staple signal arrives from the host machine,
the stapler moves to the staple wait position appropriate for staple
position and the paper size. See the figures shown below for an
idea of the wait position according to the stapling mode.
Front 1-Point Stapling
The wait position is the same as the stapling position.
Rear 1-Point Stapling
The wait position is the same as the stapling position.
The wait position is the same as the stapling position.
2-Point Stapling
The stapler is kept in wait in the front of the paper. Stapling occurs
at two points, first in the front, and then at the back.
The stapler is kept in wait in the front of the paper. Stapling occurs
at two points, first in the front, and then at the back.
Staple
home
position
detection
signal
Staple
detection
signal
Staple
edge
position
detection
signal
Staple
drive
signal
Finisher controller PCB
FFSM
Back alignment
plate
Stopper
Staple position/
wait position
Feeding direction
Front alignment
plate
Back alignment plate
Staple position/
wait position
Stopper
Feeding direction
Front alignment plate
Back alignment plate
Staple position
Stopper
Staple position/
wait position
Stopper
Stopper
Front alignment
plate
Feeding direction
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