Adjusting The Thread Take-Up Spring; Example Of The Thread Tension - JUKI AB-1351 Instruction Manual

4-7. Adjusting the thread take-up spring

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4-8. 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 spun thread #50
Polyester filament thread #50
The standard stroke of thread take-up spring 1 is
8 to 10 mm, and the pressure at the start is 0.1 to
0.3N.
1)
1
2)
2
Needle thread
Material
tension setting
Wool 50 to 55
Wool 30 to 35
– 18 –
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
increase.
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]
10mm [13mm]
10mm [13mm]
Strength
0.2N
0.1N