Adjusting The Thread Take-Up Spring; Example Of The Thread Tension - JUKI LK-1901AN Instruction Manual

7. Adjusting the thread take-up spring
4
3
8. Example of the thread tension
When using the sewing machine for the first time, adjust the thread tension referring to the table below.
Thread
Polyester filament thread #50
Polyester spun thread #50
Polyester spun thread #60
(Thread clamp OFF)
Cotton thread #50
Cotton thread #20
1
2
Material Needle thread tension
setting
Wool 30 to 35
Wool 50 to 55
T/C broad 30 to 35
Denim 35 to 45
Denim 35 to 45
6
－
The standard stroke of thread take-up spring 1 is 8
to 0 mm, and the pressure at the start is 0. to 0.3N.
) Adjusting the stroke
Loosen setscrew 2 , and turn thread tension asm.
3 .
Turning it clockwise will increase the moving
amount and the thread drawing amount will in-
crease.
2) Adjusting the pressure
To change the pressure of the thread take-up
spring, insert a thin screwdriver into the slot of
thread tension post 4 while screw 2 is tightened,
and turn it. Turning it clockwise will increase the
pressure of the thread take-up spring. Turning it
counterclockwise will decrease the pressure.
Thread take-up spring moving
amount [Thread drawing amount]
0mm [3mm]
0mm [3mm]
8 to 0mm [ to 3mm]
0mm [3mm]
8 to 0mm [ to 3mm]
－
Strength
0.N
0.2N
0.N
0.N
0.N