MX-5500N, MX-6200N, MX-7000N (serv.man17). MX-FNX3 4 MX-RBX2 MXPNX2A-D SERVICE MANUAL-Operational Description - Sharp Copying Equipment Peripheral (repair manual). Page 20

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MX-FNX4  OPERATIONAL DESCRIPTION  5 – 20
F. Stitch operation (MX-FNX4)
To enable stitching at two locations on a stack, two stitcher units
(front, rear) are used. Each stitcher unit is equipped with a stitcher
motors (FSFSTM, FSRSTM) for drive, a stitcher home position
sensors (FSSHP2, FSSHP1) for detection of position and a staple
sensors (FSSD2, FSSD1) for detection of the presence/absence of
staples.
The stitcher base is designed so that it may be drawn out to the
front from the saddle stitcher for replacement of the staple cartridge
or removal of a staple jam. The stitcher unit in sensor (FSSIND) is
used to make sure that the stitcher base is properly fitted to the
saddle stitch unit.
Safety switches are not mounted for the saddle stitch unit (front,
rear), as the location does not allow access by the user.
5. Stack tray operation
A. Tray operation
This machine has two delivery trays, No.1 tray (upper) and No.2
tray (lower). The upper and lower trays can move up and down
independently.
The No.1 tray is moved up and down by the No.1 tray shift motor
(FTLM1), and No.2 tray by the No.2 tray shift motor (FTLM2).
The No.1 tray paper sensor (FBED1) and the No.2 tray paper sen-
sor (FBED2) are provided for detection of presence of paper
stacked on the tray.
The stack height sensor (FSLD1) detects the home position of the
No.1 tray, and the second stack height sensor (FSLD2) detects the
home position of the No.2 tray. If paper has already been stacked
on the tray, the home position is located at the top of the stack. If no
paper is stacked on the tray, the home position is located at the
point that the edge of the tray is detected.
The finisher controller PCB starts the drive of the No.1 tray shift
motor (FTLM1) and the No.2 tray shift motor (FTLM2) to return the
tray to its home position as the power supply switch turns on. When
the tray is already at the home position, it is moved away from the
home position once, then returned to that position. When both No.1
tray and No.2 tray are at the home positions, the above operation is
performed for the No.1 tray and No.2 tray in this order.
The finisher controller PCB raises the No.2 tray so that it is at the
delivery port, if the tray specified by the host machine is the No.2
tray.
After paper is stacked on the tray, the No.1 tray shift motor (FTLM1)
or the No.2 tray shift motor (FTLM2) is driven by the predetermined
pluses, and the tray is lowered. Then, the tray is returned to its
home position for the next stack.
The upper limit and lower limits of tray are detected by the three
area sensors (FAED1, FAED2, FAED3, FAED21, FAED22,
FADE23) on the No.1 tray/No.2 tray shift area sensor PCB. When
the finisher controller PCB detects the upper end or lower end of
the tray, drive of the No.1 tray shift motor (FTLM1) and the No.2
tray shift motor (FTLM2) is stopped.
Excess in stack height of large size and caused when large size
and mixed size paper can be detected by the combination of ON/
OFF of the area sensors (FAED1, FAED2, FAED3, FAED21,
FAED22, FADE23).
The finisher controller PCB cuts off the +24V power of the No.1 tray
shift motor (FTLM1) to stop the operation of the finisher as soon as
the No.1 tray close detector switch (FCCD) turns on.
Stitch home position sensor
(front)(FSSHP2)
Stitch motor (front)(FSFSTM)
Stitch home position sensor
(back)(FSSHP1)
Stitch motor (back)(FSRSTM)
No.1 paper sensor (FS1PD)
Alignment motor (FSJM)
:Alignment
:Escape
Cam
Pedestal
Stitcher (back)
Stitcher (front)
Stack
Rack
No.1 tray paper sensor (FBED1)
No.1 tray close detection switch (FCCD)
No.1 tray shift
motor (FTLM1)
No.1 tray shift
area sensor PCB
No.2 tray shift
motor (FTLM2)
No.2 tray shift
area sensor PCB
No.2 tray paper sensor (FBED2)
Rack
Shielding plate
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