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5-5. Adjusting Thread Tension
1) Adjust the lower thread tension by slightly turning the tension adjusting screw①, so that when the end of thread is picked
up by hand, the thread does not get loose.
※ The average tension of pulling the thread out of the bobbin case is 30~50g.
2) Lower the presser foot and turn the tension adjusting screw② to adjust the upper thread.
[ Fig. 21 ]
②
Weaker
Stronger
①
5-6. Adjusting Thread Take-up Spring
1) The scope of operation of the thread take-up spring is 7~10mm.
The standard strength of the thread take-up spring twist is 40~60g.
2) When adjusting the scope of operation of the thread take-up spring, loosen the fixing screw① for the thread take-up and
turn the thread adjusting device (Adjust the scope of operation to be smaller for heavy materials and vice versa for light
materials.)
3) Adjust strength of the thread take-up spring by inserting a driver into the groove of the thread adjusting device post② and
turn it left or right (Adjust strength of the thread take-up spring to be stronger for heavy materials, and vice versa for light
materials.)
[ Fig. 22 ]
②
①
Small
Large
7-10mm
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