
7-7
Thread Tension
4-thread overlock seam
Stitch program 18
If all the thread tensions are set correctly,
the looping of the two looper threads (red
and yellow) meet right at the edge of the
fabric.
The upper looper thread (red) appears on
the underside of the fabric.
Adjust the red thread (upper looper)
tension to a higher setting and/or lower
the yellow thread (lower looper) tension.
Thread tension setting too low.
The lower looper (yellow) appears on the
upper side of the fabric.
Adjust the yellow thread (lower looper
(yellow)) tension to a higher setting
and/or lower the red thread (upper looper)
tension.
The needle threads (blue and green) are
too loose, causing large loops of needle
thread on the underside of the fabric. Set
the blue and green thread tension to a
higher value.
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