Sharp MX-FNX3 / MX-FNX4 Service Manual ▷ View online
MX-FNX4 OPERATIONAL DESCRIPTION 5 – 22
6. Punch module (MX-PNX2A/B/C/D)
A. Basic operations
(1) Outline
The punch module is an option, and is designed for installation
between the host machine and the paper path of the finisher.
When the sheets from the host machine reach the punch module,
they are fed by the punch feed roller. When the trailing edge of a
sheet from the host machine reaches the punch module, the sheet
is stopped once, and the punch shaft is rotated to punch a hole
along the trailing edge. These operations are controlled by the fin-
isher control PCB, and the components of the punch module are
driven by the punch controller PCB.
between the host machine and the paper path of the finisher.
When the sheets from the host machine reach the punch module,
they are fed by the punch feed roller. When the trailing edge of a
sheet from the host machine reaches the punch module, the sheet
is stopped once, and the punch shaft is rotated to punch a hole
along the trailing edge. These operations are controlled by the fin-
isher control PCB, and the components of the punch module are
driven by the punch controller PCB.
B. Punching operation
(1) Outline
The punch module is located in the paper path from the host
machine to the finisher, and is used to punch holes in sheets when-
ever they are stopped once. The sheets from the host machine are
led by the punch feed roller. When the trailing edge of a sheet
reaches the punch module, the punch feed roller stops the sheet
once to punch a hole along the trailing edge of the sheet.
Names and functions of the motors and sensors to be used for
punch operation are shown below.
machine to the finisher, and is used to punch holes in sheets when-
ever they are stopped once. The sheets from the host machine are
led by the punch feed roller. When the trailing edge of a sheet
reaches the punch module, the punch feed roller stops the sheet
once to punch a hole along the trailing edge of the sheet.
Names and functions of the motors and sensors to be used for
punch operation are shown below.
(2) Control configuration
The punch module has a die and hole puncher (punch blade). The
hole puncher is driven by the punch motor (FPNM). It is attached to
the eccentric cam of the punch shaft, and rotation of the punch
shaft is converted into reciprocating motion for punching operation.
The punch motor (FPNM) is a DC motor. The home position of the
punch shaft is detected by the punch home position sensor
(FPHPD). To make sure that the punch motor (FPNM), which is a
DC motor, stops exactly at its home position, the punch motor is
stopped in relation to the count of the clock pulses kept by the
punch motor clock sensor (FPE). A single punching operation is
executed by rotating the punch shaft 180
hole puncher is driven by the punch motor (FPNM). It is attached to
the eccentric cam of the punch shaft, and rotation of the punch
shaft is converted into reciprocating motion for punching operation.
The punch motor (FPNM) is a DC motor. The home position of the
punch shaft is detected by the punch home position sensor
(FPHPD). To make sure that the punch motor (FPNM), which is a
DC motor, stops exactly at its home position, the punch motor is
stopped in relation to the count of the clock pulses kept by the
punch motor clock sensor (FPE). A single punching operation is
executed by rotating the punch shaft 180
° from its home position.
As many as five light-receiving transistors (photosensor PCB) are
mounted over the inlet paper path of the punch module; on the
other hand, as many as five LEDs (LED PCB) are mounted under
the path, together serving as five sensors. The frontmost sensor
(LED5, PTR5) is used as a trailing edge sensor to detect the train-
ing edge of sheets, and the remaining four (LED1 through LED4,
PTR1 through PTR4) are used as horizontal registration sensors to
detect the rear position of sheets when punching holes.
The punch motor, punch module, and sensors shown above make
up the punch slide unit, which moves to the front/rear to suit the
selected paper size. The movement to the front/rear is driven by
the punch horizontal registration motor (FPSM). The home position
of the punch slide unit is detected by the horizontal registration
home position sensor (FPSHPD), and the horizontal registration
motor (FPSM) is a two-phase stepping motor.
The punch motor and the horizontal registration motor are driven
by the punch controller PCB according to the control commands
from the finisher controller.
The waste paper occurring as the result of punching is collected in
the waste paper case. The case is monitored by the reflection type
sensor (FPDD on the dust full sensor PCB).
mounted over the inlet paper path of the punch module; on the
other hand, as many as five LEDs (LED PCB) are mounted under
the path, together serving as five sensors. The frontmost sensor
(LED5, PTR5) is used as a trailing edge sensor to detect the train-
ing edge of sheets, and the remaining four (LED1 through LED4,
PTR1 through PTR4) are used as horizontal registration sensors to
detect the rear position of sheets when punching holes.
The punch motor, punch module, and sensors shown above make
up the punch slide unit, which moves to the front/rear to suit the
selected paper size. The movement to the front/rear is driven by
the punch horizontal registration motor (FPSM). The home position
of the punch slide unit is detected by the horizontal registration
home position sensor (FPSHPD), and the horizontal registration
motor (FPSM) is a two-phase stepping motor.
The punch motor and the horizontal registration motor are driven
by the punch controller PCB according to the control commands
from the finisher controller.
The waste paper occurring as the result of punching is collected in
the waste paper case. The case is monitored by the reflection type
sensor (FPDD on the dust full sensor PCB).
Motor or sensors
Functions
Punch motor (FPNM)
Drive of punch module
Horizontal registration motor (FPSM)
Drive of punch slide unit
Punch feed motor (FSIFM)
Drive of punch feed roller
Horizontal registration home position
sensor (FPSHPD)
sensor (FPSHPD)
Detection of home position of
punch slide unit
punch slide unit
Punch motor clock sensor (FPE)
Clock detection of punch motor
Punch home position sensor
(FPHPD)
(FPHPD)
Detection of home position of
punch shaft
punch shaft
Horizontal registration sensor (LED 1
to LED4, PTR1 to PTR4)
to LED4, PTR1 to PTR4)
Detection of edge in the back side
of paper
of paper
Trailing edge sensor (LED 5, PTR5)
Detection of trailing edge of paper
Dust full sensor (FPDD)
Detection of punch dust full
Finisher unit
control system
Punch
control
PCB
Horizontal
registration
drive system
Punch
drive
system
Feed
drive
system
Punch control PCB (1/2)
Punch control PCB (2/2)
Trailing
edge
detector
signal
(LED5,PTR5)
PAEND
W
aste
full
detection
signal
(FPDD)
DFULL
Horizontal
registration
home
position
(FPSHPD)
detection
signal
SREGHP
Punch
feed
motor
(FSIFM)
drive
signal
Horizontal
registration
motor
(FPSM)
drive
signal
Horizontal
registration
detection
signal
(LED1-4,PTR1-4)
SREG1-4
Punch
motor
(FPNM)
drive
signal
Punch
motor
clock
(FPE)
detection
signal
PUNCHCLK
Punch
home
position
(FPHPD)
detection
signal
PUNCHHP
MX-FNX4 OPERATIONAL DESCRIPTION 5 – 23
(3) Punching operation
The hole puncher is driven by the punch motor (FPNM). The home
position for the hole puncher is detected by the punch home posi-
tion sensor (FPHPD).
The hole puncher punches a hole when the punch shaft is rotated
180
position for the hole puncher is detected by the punch home posi-
tion sensor (FPHPD).
The hole puncher punches a hole when the punch shaft is rotated
180
° from the home position, causing the punch to make a single
round trip. The 2/3-hole type punches a hole, but the circumference
of the punch shaft is divided into two (half for 2-hole and the other
half for 3-hole). Selection of the 2-hole type or 3-hole type depends
on the commands from the host machine.
1) 2-Hole, 4-Hole Type
of the punch shaft is divided into two (half for 2-hole and the other
half for 3-hole). Selection of the 2-hole type or 3-hole type depends
on the commands from the host machine.
1) 2-Hole, 4-Hole Type
The home position is identified when the punch home position
sensor is ON. The punching operation for the first sheet ends
when the punch shaft has rotated 180
sensor is ON. The punching operation for the first sheet ends
when the punch shaft has rotated 180
° and the
punch home position sensor goes ON from OFF; the punching
operation for the second sheet ends when the punch shaft has
rotated 180
operation for the second sheet ends when the punch shaft has
rotated 180
° in reverse and the punch home position sensor
goes ON from OFF.
Punch operation in the case of two sheets is as shown below.
a)
Punch operation in the case of two sheets is as shown below.
a)
A hole is punched along the trailing edge of the 1st sheet.
b)
A hole is made along the trailing edge of the 2nd sheet.
2) 2/3-Hole Type
The home position is identified when the punch home position
sensor is ON. To make two holes, the punching operation for
the first sheet ends when the punch shaft rotates 180
sensor is ON. To make two holes, the punching operation for
the first sheet ends when the punch shaft rotates 180
° (half cir-
cumference) and the punch home position sensor goes ON. At
this time, the 3-hole puncher makes a single round trip in
escape direction (moving up the hole puncher) on a half cir-
cumference of the punch shaft. The punching operation for the
second sheet ends when the punch shaft has rotated 180
this time, the 3-hole puncher makes a single round trip in
escape direction (moving up the hole puncher) on a half cir-
cumference of the punch shaft. The punching operation for the
second sheet ends when the punch shaft has rotated 180
°
counterclockwise and the punch home position sensor goes
ON.
At this time, the 3-hole puncher makes a single round trip in
escape direction (moving up the hole puncher) on the other
half circumference of the punch shaft. The punching operation
takes place as shown below when making two holes in two
sheets of paper.
ON.
At this time, the 3-hole puncher makes a single round trip in
escape direction (moving up the hole puncher) on the other
half circumference of the punch shaft. The punching operation
takes place as shown below when making two holes in two
sheets of paper.
a)
A hole is punched along the trailing edge of the 1st sheet.
While two holes are being made, the 3-hole puncher
makes a single round trip in escape direction (moving up
the hole puncher).
makes a single round trip in escape direction (moving up
the hole puncher).
b)
Holes are made along the trailing edge of the 2nd sheet.
While two holes are being made, the 3-hole puncher
makes a single round trip in escape direction (moving up
the hole puncher).
makes a single round trip in escape direction (moving up
the hole puncher).
Punch home
position sensor (FPHPD) Sensor flag
Punch shaft
Eccentric cam
Die
Die
Hole
puncher
Paper
[punch shaft at rest/
home position]
Waste paper
[punch shaft CW rotation
by 90°/hole made]
[punch shaft CW rotation by 180°/
end of punching operation]
[punch shaft at rest/
home position]
[punch shaft CCW rotation
by 90°/hole made]
[punch shaft CCW rotation by 180°/
end of punching operation]
Punch home
position sensor (FPHPD) Sensor flag
Punch shaft
Eccentric cam
Die
Die
Hole
puncher
Paper
[punch shaft at rest/
home position]
Waste paper
[punch shaft CW rotation
by 90°/hole made]
[punch shaft CW rotation by 180°/
end of punching operation]
[punch shaft at rest/
home position]
[punch shaft CW rotation
by 90°/punch at upper limit]
[punch shaft CW rotation by 180°/
punch back to initial position]
[punch shaft at rest/
home position]
[punch shaft CCW rotation
by 90°/hole made]
[punch shaft CCW rotation by 180°/
end of punching operation]
[punch shaft at rest/
home position]
[punch shaft CCW rotation
by 90°/punch at upper limit]
[punch shaft CCW rotation by 180°/
punch back to initial position]
MX-FNX4 OPERATIONAL DESCRIPTION 5 – 24
(4) Horizontal registration operation
The horizontal registration drive for the punch slide unit is provided
by the horizontal registration motor (FPSM). The home position of
the punch slide unit is detected by the horizontal registration home
position sensor (FPSHPD). The punch slide unit detects the trailing
edge of sheets using the trailing edge sensor (LED5, PT5) and the
horizontal registration sensors (LED1 through 4, SREG1 through
4), and causes a move to a specific position matching the trailing
edge of each sheet (in relation to the size of the sheet).
The horizontal registration operation takes place as follows:
1) When the leading edge of a sheet from the host machine is
by the horizontal registration motor (FPSM). The home position of
the punch slide unit is detected by the horizontal registration home
position sensor (FPSHPD). The punch slide unit detects the trailing
edge of sheets using the trailing edge sensor (LED5, PT5) and the
horizontal registration sensors (LED1 through 4, SREG1 through
4), and causes a move to a specific position matching the trailing
edge of each sheet (in relation to the size of the sheet).
The horizontal registration operation takes place as follows:
1) When the leading edge of a sheet from the host machine is
detected by the trailing edge sensor (LED5, PT5), the horizon-
tal registration motor (FPSM) starts to move the punch slide
unit toward the front.
tal registration motor (FPSM) starts to move the punch slide
unit toward the front.
2) When the horizontal registration sensor (LED1 through 4, PT1
through 4) suited to the paper size signal from the host
machine detects the rear edge of the sheet, the horizontal reg-
istration motor (FPSM) causes a further move to a specific
position, and stops the punch slide unit.
machine detects the rear edge of the sheet, the horizontal reg-
istration motor (FPSM) causes a further move to a specific
position, and stops the punch slide unit.
3)
When the trailing edge sensor (LED5, PT5) detects the trailing
edge of the sheet, the drive of the punch feed motor (FSIFM) is
stopped, thereby stopping the sheet. Then, the punch motor
(FPNM) is driven to punch holes in the sheet.
edge of the sheet, the drive of the punch feed motor (FSIFM) is
stopped, thereby stopping the sheet. Then, the punch motor
(FPNM) is driven to punch holes in the sheet.
4)
When the punching operation ends, the punch feed motor
(FSIFM) of the finisher is driven and, at the same time, the hor-
izontal registration motor (FPSM) is rotated in reverse to return
the punch slide unit to its home position.
(FSIFM) of the finisher is driven and, at the same time, the hor-
izontal registration motor (FPSM) is rotated in reverse to return
the punch slide unit to its home position.
5)
For each sheet that arrives in succession, the punch slide unit
is returned to its home position, and is caused to repeat steps
1 through 4.
is returned to its home position, and is caused to repeat steps
1 through 4.
Punch slide unit
Trailing edge sensor
(LED5,PTR5)
Horizontal registration motor (FPSM)
Direction of
paper delivery
Paper
Horizontal registration sensor 1 (LED1 PTR1)
;used to detect the edge of sheets of A3, A4, LTR,
279mm x 432mm (11x17).
Horizontal registration sensor 2 (LED2 PTR2)
;used to detect the edge of sheets of B4, B5, LTRR, LGL.
Horizontal registration sensor 3 (LED3 PTR3)
;used to detect the edge of sheets of A4R.
Horizontal registration sensor 4 (LED4 PTR4)
;used to detect the edge of sheets of B5R.
Punch
Trailing edge sensor
(LED5,PTR5)
Horizontal registration
sensor (LED1-4,PTR1-4)
Punch home position sensor
(FPHPD)
Horizontal registration home
position sensor (FPSHPD)
Horizontal registration motor
(FPSM)
Punch motor (FPNM)
Punch feed motor (FSIFM)
CW rotation
CCW rotation
MX-FNX4 OPERATIONAL DESCRIPTION 5 – 25
7. Detecting jams
A. Detecting jams in finisher
The following sensors are used to detect the presence/absence of paper and to make sure that sheets are moved properly:
• Inlet sensor (FED)
• Feed path sensor (FPDD)
A jam is identified with reference to the presence/absence of paper at each specific sensor at the times programmed in the memory of the
microprocessor (CPU) on the finisher controller PCB.
When the CPU identifies a jam, it suspends the finisher's delivery operation and informs the host machine DC controller of the presence of a
jam. After the paper jam is removed, and all the doors are closed, the finisher checks whether or not paper is being detected by the above two
sensors (inlet sensor, No.1 delivery sensor). If the sensors detect a copy, the finisher unit judges that paper jams have not completely been
removed, and sends the paper jam removal signal to the host machine again.
• Inlet sensor (FED)
• Feed path sensor (FPDD)
A jam is identified with reference to the presence/absence of paper at each specific sensor at the times programmed in the memory of the
microprocessor (CPU) on the finisher controller PCB.
When the CPU identifies a jam, it suspends the finisher's delivery operation and informs the host machine DC controller of the presence of a
jam. After the paper jam is removed, and all the doors are closed, the finisher checks whether or not paper is being detected by the above two
sensors (inlet sensor, No.1 delivery sensor). If the sensors detect a copy, the finisher unit judges that paper jams have not completely been
removed, and sends the paper jam removal signal to the host machine again.
Jam type
Sensor
Jam condition
Code
Inlet sensor delay
FED
The inlet sensor (FED) does not detect paper sheet even if predetermined time
(distance) has passed after receiving delivery signal from the host machine.
(distance) has passed after receiving delivery signal from the host machine.
1001
Inlet sensor stationary
FPDD
The sheet does not move past from the inlet sensor (FED) even if predetermined
time (distance) has passed after the inlet sensor (FED) detects the sheet.
time (distance) has passed after the inlet sensor (FED) detects the sheet.
1101
Feed path sensor delay
FPDD
The delivery path sensor (FPDD) does not detect paper sheet even if
predetermined time (distance) has passed after the inlet sensor (FED) detects the
sheet.
predetermined time (distance) has passed after the inlet sensor (FED) detects the
sheet.
1004
Feed path sensor stationary
FPDD
The sheet does not move past from the feeder path sensor (FPDD) even if
predetermined time (distance) has passed after the feed path sensor (FPDD)
detects the sheet.
predetermined time (distance) has passed after the feed path sensor (FPDD)
detects the sheet.
1104
Premature arrival
FED
The inlet sensor (FED) detects paper before receiving delivery signal from the host
machine.
machine.
1200
Staple
FSHPD
When the staple motor (FFSM) is rotating clockwise, the staple home position
sensor (FSHPD) does not turn on within the predetermined period after it has
turned off. However, the sensor turns on within the predetermined period after the
motor (FFSM) has been rotated counterclockwise.
*Since the staple home position sensor (FSHPD) is incorporated in the stapler, the
stapler must be replaced if the sensor is malfunctioned.
sensor (FSHPD) does not turn on within the predetermined period after it has
turned off. However, the sensor turns on within the predetermined period after the
motor (FFSM) has been rotated counterclockwise.
*Since the staple home position sensor (FSHPD) is incorporated in the stapler, the
stapler must be replaced if the sensor is malfunctioned.
1500
Power ON
FED, FPDD
When power is supplied, either of the inlet sensor (FED) or delivery path sensor
(FPDD) detects a sheet.
(FPDD) detects a sheet.
1300
Door open
FCD, FFDD, FFDD
One of the upper cover open/close sensor (FCD), front cover open/close sensor
(FFDD), front cover close detector switch (FFDD) detects the open of the cover.
(FFDD), front cover close detector switch (FFDD) detects the open of the cover.
1400
FPDD
FED
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