JUKI PS800-8045 Manuale utente
CAUTION :
This Instruction Manual provides instructions for the active tension. When you want to use
your sewing machine with this product attached, refer to the “Safety precautions” in the In-
struction Manual for your sewing machine carefully until you fully understand the included
precautions in prior.
PS-800-8045
Active tension
INSTRUCTION MANUAL
i
CONTENTS
1. List of parts ............................................................................................................................1
2. Assembling the parts ............................................................................................................ 3
3. Wiring (miscellaneous cover components of the sewing machine) ................................. 5
4. Wiring (inside the electrical equipment rack) ..................................................................... 6
5. Method for adjusting the AT ................................................................................................. 8
5-1. Setting of the parameters ............................................................................................................8
5-2. Adjusting the projection amount of the plunger........................................................................9
6. Method for using the AT...................................................................................................... 10
6-1. Method for setting the AT thread tension.................................................................................10
6-2. Method for changing the thread tension during sewing.........................................................12
6-3. Method for deleting the changes in thread tension setting during sewing ..........................13
– 1 –
1. List of parts
Active tension (asm.)
No. Part number Part name Qty
①40244934 Tension release auxiliary shaft (asm.) 1
①-1 40236683 Tension release auxiliary shaft (1)
①-2 40236685 Tension release auxiliary pin (1)
①-3 26201004 Guide pin (1)
①-4 RE0320000K0 E retaining ring (1)
②40244974 AT solenoid asm. 1
②-1 40236465 Solenoid (1)
②-2 RE0500000K0 E retaining ring (1)
②-3 NM6040000SN Hexagonal nut M4 1 type (1)
②-4 40236686 Solenoid screw (1)
②-5 40236680 Solenoid mounting plate (1)
②-6 40236681 Left AT shaft bushing (1)
②-7 SM1850600SP Countersunk head screw (2)
②-8 SM6040802TP Bolt screw (2)
①40244934 Tension release auxiliary shaft
①-2
①-1
①-4 ①-3
②40244974 AT solenoid
②-4
②-3
②-2
②-1 ②-5
②-6
②-7
②-8
WARNING :
In order to prevent accidents caused by a sudden start of the sewing machine, the following proce-
dure has to be carried out after turning OFF the power supply and air supply to the sewing machine.
– 2 –
③④⑤
No. Part number Part name Qty
③40172470 Thread tension controller (asm.) 1
④40243919 AT spring 1
⑤SM6041402TP Bolt M4 L=14 2
⑥40243045 AT SOL PCB asm. 1
⑦40243046 AT SOL cable asm. A 1
⑧40243047 AT SOL cable asm. B 1
⑨KX000000210 Cable tie mount 2
⑩SM4051601SC Countersunk head screw M5 x 0.8 L=10 2
⑪HX002940000 Fixation base 1
⑫SM6041002TN Bolt M4, L=10 1
⑬EA9500B0200 Cable clip band 6
⑥
⑦
⑧
⑨ ⑪
– 3 –
1) Loosen screw ❶. Detach tension release
solenoid ❷.
2. Assembling the parts
❷❷
3) Detach the face plate. Take out tension disc
releasing solenoid tension release auxiliary
shaft asm. ❺from the solenoid mounting hole.
❹❹
❺❺
❶❶
❸❸
2) Loosen screw ❸. Detach thread tension con-
troller ❹.
Tension disc releasing solenoid
tension release auxiliary shaft asm.
Pull the auxiliary shaft in the direction
of the arrow until it comes off.
WARNING :
In order to prevent accidents caused by a sudden start of the sewing machine, the following proce-
dure has to be carried out after turning OFF the power supply and air supply to the sewing machine.
– 4 –
4) Secure AT solenoid asm ②in the
mounting hole with screws ⑤ (two
pieces).
6) Put the end Aof tension release auxiliary
shaft asm. ①into the thread tension con-
troller mounting hole.
Put spring ④on the end Bof the tension
release auxiliary shaft asm.
Mounting hole
End A End B
E retaining ring Spring
E retaining ring
Retaining ring
of the thread
tension con-
troller asm.
Grease
application
points
5) Put a little amount of grease (white) sup-
plied in the accessory bag on a piece of
cloth. Then, apply a thin coat of the grease
to the AT shaft, reseat spring and tension
release pin with that cloth.
– 5 –
3. Wiring (miscellaneous cover components of the sewing machine)
1) Wire AT solenoid ca-
ble ②along the route
indicated with the red
dotted line as shown
in the figure on the
left.
During this proce-
dure, change the
existing screw with
screw ⑫. Then,
secure fixing base ⑪
with it. Then, secure
the cable with cable
clip band ⑬.
2) Wire AT solenoid ca-
ble ②along the route
indicated with the red
dotted line as shown
in the figure on the
left.
During this proce-
dure, loosen the
screw and tighten
fixing base ⑨. Then,
secure the cable with
cable clip band ⑬.
7) Pressing the retaining spring of the AT
thread tension controller asm. against
the end surface of the tension controller
mounting hole, secure it with screw ❸at
a position where the stroke of the thread
take-up spring becomes 4 to 5 mm.
If you cannot press the retaining
spring of the thread tension con-
troller asm. against the end sur-
face of the mounting hole, loosen
bracket screw ❻of the AT thread
tension controller.
After pressing the retaining spring
against the end surface of the
mounting hole, temporarily tighten
bracket screw ❻.
⑪⑫⑬⑪⑫⑬
②②
⑨⑬
❸❸
4～5mm
❻❻
– 6 –
4. Wiring (inside the electrical equipment rack)
3) Pull AT solenoid cable ②into the electrical
equipment rack through cable entrance of the
rack.
Cable entrance
1) Connect AT solenoid cable ②and AT SOL cable asm. A ⑦to the AT SOL PCB asm. ⑥in the elec-
trical equipment rack.
[Standard type and the laser type]
⑥⑥
②②⑥⑥⑦⑦
GND
LOOSE
24V
2) Insert the pin contact of the black wire (GND) of AT SOL cable asm. A ⑦into IN6/IN7 connector pin
No. 4.
3) Connect AT SOL cable asm. A connector ⑦to the loose line / LOOSE connector of the electrical
control box.
Pin No. 4
Loose thread
IN6/IN7
– 7 –
⑬⑬
[ Rotary knife type ]
⑥⑥
②②⑥⑥⑧⑧
GND
LOOSE
24V
5) Connect AT solenoid ②cable and AT SOL cable asm. B ⑧to AT SOL PCB asm. ⑥in the electrical
equipment rack.
6) Connect terminals of AT SOL cable asm. B ⑧
to the IO PCB.
Refer to the table shown below for the connec-
tion destinations of the respective terminals.
Color of line Cable Connection desti-
nation
Brown -24V +24V
Gray LOOSE Loose thread -
Black GND GND
7) Put the cables together in the duct.
Loose thread -
+24V
GND
4) Put the cables together in the duct. Secure the
PCB with cable clip band ⑬.
PCB
– 8 –
5. Method for adjusting the AT
1) Press button A.
5-1. Setting of the parameters
2) Press button B.
In the default state, the password that has
been factory-prepared at the time of delivery is
provided.
The factory-provided password is "11111111".
3) Press button C.
A
B
C
E
D F
4) When you want to enable the AT function,
change the setting of Dfrom "Tension disk
release" to "Thread clamp".
In the case of the sewing machine for light-
weight materials, set correction value Fto
"-10". After you have set the correction value,
press button E.
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