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FOUR THREAD OVEREDGING STITCH USING 2 NEEDLES
When the lower looper thread is unbalanced and appears on the top-side of fabric
When the left-hand needle thread is too loose
When the right-hand needle thread is too loose
Tighten the thread tension of the lower looper
(Dial R) or loosen the thread tension of the
upper looper (Dial B).
Wrong side
Right side
Left-hand needle
thread
Upper looper thread
Right-hand needle
thread
Lower looper thread
Tighten the thread tension of the left needle
(Dial Y) or loosen both looper thread (Dial B
and R).
Wrong side
Right side
Lower looper thread
Right-hand needle
thread
Upper looper thread
Left-hand needle
thread
Tighten the thread tension of the right needle
(Dial G).
Wrong side
Right side
Lower looper thread
Right-hand needle
thread
Upper looper thread
Left-hand needle
thread
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