Sharp MX-FN19 / MX-FN20 / MX-PN12 Service Manual / Specification ▷ View online
MX-FN19 OPERATIONAL DESCRIPTION 6 – 8
Feeding of Stacks
The stitched paper is fed to the folding and delivery positions. The
paper folding must be performed at the point that the center of
paper (stitched point) is aligned with the height of the paper push-
ing plate and the folding roller pressurizing section.
The stack is moved forward by operating the paper positioning
plate. When the plate is operated, the guide plate that has been
covering the paper folding rollers, also moves down so that the
paper folding rollers directly face the stack.
The stitched paper is fed to the folding and delivery positions. The
paper folding must be performed at the point that the center of
paper (stitched point) is aligned with the height of the paper push-
ing plate and the folding roller pressurizing section.
The stack is moved forward by operating the paper positioning
plate. When the plate is operated, the guide plate that has been
covering the paper folding rollers, also moves down so that the
paper folding rollers directly face the stack.
Folding/Delivery
The paper pushing plate pushes against the center of the stack to
move it in the direction of the paper folding rollers. In response, the
paper folding rollers pick the stack along its center and fold it in two.
The paper folding rollers together with the delivery roller then move
the stack along to output it on the delivery tray.
The paper pushing plate pushes against the center of the stack to
move it in the direction of the paper folding rollers. In response, the
paper folding rollers pick the stack along its center and fold it in two.
The paper folding rollers together with the delivery roller then move
the stack along to output it on the delivery tray.
Folding roller
Paper pushing
plate
Guide plate
Paper positioning
plate
Paper positioning
plate home
position sensor
FSPPHPD
Folding roller
Delivery roller
MX-FN19 OPERATIONAL DESCRIPTION 6 – 9
G. Controlling the inlet flappers
Outline
The two flappers mounted at the paper inlet are operated to config-
ure the feed path according to the size of paper. The flappers are
used to enable the following:
1) To detect the passage of the trailing edge of the paper being
The two flappers mounted at the paper inlet are operated to config-
ure the feed path according to the size of paper. The flappers are
used to enable the following:
1) To detect the passage of the trailing edge of the paper being
moved by an appropriate sensor.
2) To prevent the following sheet from butting against the top of
the existing stack,
Table below shows the relationship between sensors and paper
sizes.
sizes.
Each flapper is driven by its solenoid.
Table below shows the relationship between solenoids and paper
sizes.
Table below shows the relationship between solenoids and paper
sizes.
Delivery Path of A3/297mmx432mm (11x17) size paper
In the case that three sheets are delivered.
In the case that three sheets are delivered.
Delivery Path of B4/LGL size paper
In the case that three sheets are delivered.
In the case that three sheets are delivered.
Sensor
A3/279mmx432mm
(11x17)
A3W/305mmx457mm
(12x18)
B4/LGL
A4R/
LTRR
No.1paper sensor
(FS1PD)
(FS1PD)
Used
Used
Used
No.2 paper sensor
(FS2PD)
(FS2PD)
Not used
Used
Used
No.2 paper sensor
(FS3PD)
(FS3PD)
Not used
Not used
Used
Solenoid
A3/279mmx432mm
(11x17)
A3W/305mmx457mm
(12x18)
B4/LGL
A4R/
LTRR
No. 1 paper deflecting
plate solenoid
(FS1DFS)
plate solenoid
(FS1DFS)
OFF
ON
ON
No. 2 paper deflecting
plate solenoid
(FS2DFS)
plate solenoid
(FS2DFS)
OFF
OFF
ON
No.1 paper sensor FS1PD
No.1 paper deflecting
plate solenoid
No.2 paper sensor FS2PD
No.2 paper deflecting
plate solenoid
No.3 paper sensor FS3PD
Paper passed
OFF
OFF
Paper unpassed
OFF
Paper unpassed
Leading edge
FS1PD
FS2PD
FS3PD
FS1PD
FS2PD
FS3PD
FS1
DFS
FS2
DFS
No.1 paper sensor
FS1PD
No.2 paper sensor
FS2PD
No.3 paper sensor
FS3PD
Paper passed
Paper passed
ON
OFF
Paper unpassed
Leading edge
FS1PD
FS2PD
FS3PD
FS1PD
FS2PD
FS3PD
FS1
DFS
FS2
DFS
MX-FN19 OPERATIONAL DESCRIPTION 6 – 10
Delivery Path of A4R/LTRR size paper
In the case that three sheets are delivered.
In the case that three sheets are delivered.
H. Controlling the movement of sheets
When the leading edge of a sheet has moved past the inlet flapper,
the intermediate feed roller and the crescent roller start to move the
sheet forward.
The intermediate feed roller is normally not in contact with the
roller. When the leading edge of a sheet reaches the intermediate
feed roller contact section, the feed plate contact solenoid (FSFCS)
causes the roller to come into contact with the roller so as to move
the sheet. The contact is broken as soon as the leading edge of the
sheet reaches the paper positioning plate. This series of operations
is executed each time a sheet arrives.
When the leading edge of the first sheet reaches the paper posi-
tioning plate, the paper positioning plate paper sensor (FSPPPD)
turns ON. The arrival of the second and subsequent sheets will not
be checked since the first sheet will still be over the sensor.
The crescent roller keeps rotating while sheets are being output,
butting the leading edge of each sheet against the paper position-
ing plate, and ultimately, keeping the leading edge of the stack in
order.
The alignment plate drives the alignment plates for each sheet so
as to put both left and right edges of the sheet in order.
the intermediate feed roller and the crescent roller start to move the
sheet forward.
The intermediate feed roller is normally not in contact with the
roller. When the leading edge of a sheet reaches the intermediate
feed roller contact section, the feed plate contact solenoid (FSFCS)
causes the roller to come into contact with the roller so as to move
the sheet. The contact is broken as soon as the leading edge of the
sheet reaches the paper positioning plate. This series of operations
is executed each time a sheet arrives.
When the leading edge of the first sheet reaches the paper posi-
tioning plate, the paper positioning plate paper sensor (FSPPPD)
turns ON. The arrival of the second and subsequent sheets will not
be checked since the first sheet will still be over the sensor.
The crescent roller keeps rotating while sheets are being output,
butting the leading edge of each sheet against the paper position-
ing plate, and ultimately, keeping the leading edge of the stack in
order.
The alignment plate drives the alignment plates for each sheet so
as to put both left and right edges of the sheet in order.
1)
The solenoid turns ON while paper is being moved so that the
roller comes into contact.
roller comes into contact.
2)
The solenoid turns OFF when the paper butts against the
paper positioning plate. The feed motor continues to rotate.
paper positioning plate. The feed motor continues to rotate.
3)
The solenoid turns ON when the next sheet arrives, and the
roller comes into contact.
roller comes into contact.
No.1 paper sensor
FS1PD
No.2 paper sensor
FS2PD
No.3 paper sensor
FS3PD
Paper passed
ON
Paper passed
ON
Paper passed
Leading edge
FS1PD
FS2PD
FS3PD
FS1PD
FS2PD
FS3PD
FS1
DFS
FS2
DFS
Intermediate feed roller
Feed motor
Feed plate contact
solenoid
Paper positioning plate
paper sensor
FSFM
FSPPPD
FSFCS
Paper positioning plate
paper sensor
FSFM
FSPPPD
FSFCS
Paper positioning
plate paper sensor
FSFM
FSPPPD
FSFCS
MX-FN19 OPERATIONAL DESCRIPTION 6 – 11
I. Aligning the sheets
The alignment plate motor (FSJM) drives the alignment plates each
time a sheet is output, putting both left and right edges of the sheet
in order. The alignment plate motor is a 4-phase stepping motor.
The position of the alignment plate is identified in reference to the
number of motor pulses from the alignment plate home position
sensor (FSAHPD).
The following briefly describes what takes place when the saddle
stitching mechanism operates on two sheets.
1) When the first sheet has been output, the alignment plates butt
time a sheet is output, putting both left and right edges of the sheet
in order. The alignment plate motor is a 4-phase stepping motor.
The position of the alignment plate is identified in reference to the
number of motor pulses from the alignment plate home position
sensor (FSAHPD).
The following briefly describes what takes place when the saddle
stitching mechanism operates on two sheets.
1) When the first sheet has been output, the alignment plates butt
against the left and right edges of the stack (first alignment).
The alignment plates leave the home position in advance and
remain in wait at points 10 mm from the edges of the stack.
The alignment plates leave the home position in advance and
remain in wait at points 10 mm from the edges of the stack.
2) The alignment plates move away from the edges of the stack
over a short distance and then butt against the edges once
again (Second alignment).
again (Second alignment).
3) The alignment plates escape to points 10 mm from the edge of
the stack.
4) When the following stack arrives, steps 1) through 3) above
are repeated.
5) The alignment plates butt against the stack once again, during
which stitching takes place.
6) The alignment plates escape to points 10 mm from the edges
of the stack, after which folding and delivery take place.
7)
When the first sheet of the following stack reaches the No.1
paper sensor, the guide moves to a point 10 mm from the edge
of the stack to be ready for the next alignment operation.
paper sensor, the guide moves to a point 10 mm from the edge
of the stack to be ready for the next alignment operation.
Paper
Alignment
plate
Paper positioning
plate
Alignment
plate
Alignment plate home position
sensor (FSAHPD)
Alignment plate
Alignment motor
Paper stack
Paper positioning
plate
Alignment
plate
Alignment plate
home position
sensor (FSAHPD)
FSJM
In case of 2 sheets:
Alignment plate home
position sensor (FSAHPD)
Alignment motor (FSJM)
Paper positioning plate
motor (FPPM)
Entry of
1st sheet
Entry of
2nd sheet
1st sheet of
following stack entry
Alignment
Escape
[1]: Move to wait position
[2]: Stitch period
[3]: Paper folding/delivery period
[4]: Move to following stack size wait position
Click on the first or last page to see other MX-FN19 / MX-FN20 / MX-PN12 service manuals if exist.