DOWNLOAD Sharp MX-5500N / MX-6200N / MX-7000N (serv.man17) Service Manual ↓ Size: 3.26 MB | Pages: 28 in PDF or view online for FREE

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MX-5500N MX-6200N MX-7000N (serv.man17)
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28
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3.26 MB
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PDF
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Peripheral
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Device
Copying Equipment / MX-FNX3 4 MX-RBX2 MXPNX2A-D SERVICE MANUAL-Operational Description
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mx-5500n-mx-6200n-mx-7000n-sm17.pdf
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Sharp MX-5500N / MX-6200N / MX-7000N (serv.man17) Peripheral ▷ View online

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.
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.
* 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)
* 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)
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.
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.
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.
Rear 1-Point Stapling
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.
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
MX-FNX4  OPERATIONAL DESCRIPTION  5 – 18
D. Stapling operation
Outline
The stapler unit staples a stack of as many sheets as specified.
The stapling position differs according to the selected staple mode
and paper size.
The stapler unit is checked by the stapler shift home position sen-
sor (FSTHPD) to find out whether it is at the home position.
The stapler unit is equipped with the stapler alignment interference
sensor (FSJOGD). While the stapler alignment interference sensor
(FSJOGD) is on, running of the staple motor (FFSM) is prohibited.
This is intended for prevention of breakage of the stopper caused
by stapling in the stopper due to out-of-step.
When starting operation after power-on, the finisher controller PCB
drives the stapler shift motor (FSM) to return the stapler unit to the
home position. If the stapler unit is already at the home position, it
is kept as it is in wait.
Stapling First Sheet
The finisher controller PCB moves the stapler depending on the
predetermined stapling position. The finisher controller PCB stops
the delivery motor (FAM) as soon as the trailing edge of the first
sheet has moved past the No.1 feed roller. Then, it rotates the
delivery motor reverse to drive the delivery roller and the return
roller, and paper is delivered to the stapling tray. The presence of
paper on the stapling tray is detected by the stapling tray sensor
(FSTPD). After paper is delivered to the stapling tray, the swing
motor (FSWM) runs to raise the stapling tray sensor (FSTPD).
When the swing guide home position sensor (FSWHPD) detects
the raise of the swing guide, the swing motor is stopped, and the
swing guide is held at the raised position.
After the stapling tray sensor detects the presence of paper, the
alignment motor runs to align paper.
The alignment motors (FFJM/FRJM) are driven for alignment of
paper after the stapling tray paper sensor detects paper.
Paper
Stapler shift motor
(FSM)
Stapler
Stapler alignment interference
sensor (FSJOGD)
Stapler shift home position sensor
(FSTHPD)
Slant staple in the front
Two point staple
Slant staple at the back
Half of
paper
width
Sensor
Code
Connector
Function
Remarks
Staple shift home position sensor
FSTHPD
J721B-6
Detects home position of stapler in the front or back
-
Stapler alignment interference sensor
FSJOGD
J717-3
Detects staple prohibition area
-
Staple home position sensor
FSHPD
J717-5
Detects home position of stapling
In stapler
Staple edge sensor
FSTD
J717-6
Detects edge of staple
In stapler
Staple sensor
FSD
J717-7
Detects presence or absence of staple in cartridge
In stapler
Function
Motor
Code
Remarks
Drive for shifting stapler
Stapler shift motor
FSM
-
Drive for staple operation
Staple motor
FFSM
-
Swing guide
Stack delivery roller
No.1 delivery rolelr
Return roller
Stapler
Stapling tray
MX-FNX4  OPERATIONAL DESCRIPTION  5 – 19
Second and Subsequent Sheets
The finisher controller PCB drives the swing motor (FSWM) when
the trailing edge of the second sheet has moved past the No.1 feed
roller to lower the swing guide. Then, it reverses the delivery motor
to turn the delivery roller (upper) and the return roller and deliver
paper to the stapling tray. At this time, the delivery roller (lower) is
not turned because the delivery lower roller clutch (FAORC) is off.
Presence of paper in the stapling tray is detected by the stapling
tray paper sensor (FSTPD).
When paper is fed to the stapling tray, the swing motor (FSWM)
runs to raise and lower the swing guide. If the swing guide home
position sensor (FSWHPD) detects the raise of the swing guide,
the swing motor is stopped, and the swing guide is held at the
raised position.
After the stapling tray paper sensor detects the presence of paper,
the alignment motors (FFJM/FRJM) are run to align paper.
Stapling Last Sheet
When the last sheet has been put in order, the finisher controller
PCB turns on the alignment motors (FFJM/FRJM) to move the
alignment plates to the alignment positions (to butt the plates
against the stack). Then, the finisher controller PCB staples at the
predetermined position.
After stapling, the finisher controller PCB runs the swing motor
(FSWM) to lower the swing guide. Then, paper stack is delivered to
the tray by the delivery roller, return the roller, and the trailing edge
assist guide.
E. Stitcher unit (MX-FNX4)
The stitcher base unit consists of two stitchers and stitcher bases.
The stitchers are fixed in position, and are not designed to slide or
swing.
Stitching is executed by driving the rotary cam by the stitcher
motors (FSFSTM, FSRSTM). The front and rear stitcher units are
operated with a time delay so as to prevent wrinkling of paper
between staples and to limit the load applied to the power supply.
(A time delay for initiating the stitcher motor startup current helps
decrease the load on the power supply.)
The stitcher home position sensors (FSSHP2, FSSHP1) are used
to monitor the movement of the rotary cam, enabling identification
of individual stitcher operations. The presence/absence of staples
inside the staple cartridge fitted to the stitcher is detected by the
staple sensors (FSSD2, FSSD1).
The alignment plates keep both edges of the stack in place while
stitching takes place.
Swing guide home position sensor (FSWHPD)
Swing motor
(FSWM)
Stack delivery motor (FAM)
Stack delivery lower roller clutch (FAORC)
Swing guide
Stack delivery roller
(lower)
Stack delivery roller
(upper)
Return roller
Stapler
Swing guide
Stack delivery roller
No.1 delivery roller
Stapling tray
Swing guide
Stack delivery roller
Return roller
Stapler
Trailing edge assist guide
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