17
Thread Tension for Zigzag Sewing
Balancing Needle Thread Tension
The needle thread and the bobbin
thread should interlock in the center
of two layers of fabric in straight
seams.
Set the desired
number of the
thread tension dial
at setting mark.
Loosen the needle thread
tension by moving the dial
to a lower number.
Tighten the needle thread
tension by moving the dial
to a higher number.
To obtain better zigzag stitches, the
upper tension should be slightly
weaker than in the case of straight
sewing. The upper thread should
appear slightly on the reverse side
of the fabric.
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