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2 Thread Overcast
Balanced Tension
The needle thread should resemble a straight
stitch on the topside (1) of the fabric. It will
lock with the lower looper thread on the fabric
edge. The needle thread should lie flat in a V-
shape on the fabric underside (2).
The lower looper thread should lie flat on the
topside of the fabric and lock with the needle
thread on the fabric edge.
The needle thread is too loose.
If the needle thread (a) is pulled up over the
fabric edge to the topside of the fabric,
increase the needle thread tension and/or
decrease the lower looper thread tension.
Cover Hem
Balanced Tension
The needle threads resemble parallel rows of
straight stitches on the topside (1) of the
fabric. The chain looper thread should be
slightly slack on the underside (2). DO NOT
set the stitch length dial below 2.5. Heavier
weight fabrics will require a longer stitch
length.
The needle thread is too loose.
If the needle thread (a) is too loose and loops
appear on the underside of the fabric, increase
the needle tension (yellow).
The needle threads are too tight.
If fabric puckers form, the needle threads are
too tight. Decrease the needle tensions.
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