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When using the sewing machine for the first time, adjust the thread tension referring to the table below.
4-7. Adjusting the thread take-up spring
The standard stroke of thread take-up sprng
1
s
8 to 10 mm, and the pressure at the start s 0.1 to
0.3N.
1) Adjustng the stroke
Loosen setscrew
2
, and turn thread tenson
asm.
3
.
Turnng t clockwse wll ncrease the movng
amount and the thread drawng amount wll
ncrease.
2) Adjustng the pressure
To change the pressure of the thread take-
up sprng, nsert a thn screwdrver nto the
slot of thread tenson post
4
whle screw
2
s tghtened, and turn t. Turnng t clockwse
wll ncrease the pressure of the thread take-
up sprng. Turnng t counterclockwse wll
decrease the pressure.
4-8. Example of the thread tension
Thread
Materal
Needle thread
tenson settng
Thread take-up sprng movng
amount [Thread drawng amount]
Strength
Polyester spun thread #50
Wool
50 to 55
10mm [13mm]
0.2N
Polyester filament thread #50
Wool
30 to 35
10mm [13mm]
0.1N