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FOUR THREAD OVEREDGING STITCH USING 2 NEEDLES
5. Thread Tension Adjustment
Tension Guide
Correct tension
When the upper looper thread is unbalanced and lies on the under side of fabric
Adjust thread tension to suit the type of material
and the size of thread used. As the number on
the thread tension dial increases, the thread
tension becomes tighter.
Adjust thread tensions using the guide as below.
Test sew on scrap of fabric. Adjust finely to
perfect seam.
Dial
刎
Fabric
Light Weight
(Chiffon, etc)
Medium
(Wool, Jersey)
Heavy
(Denim, etc)
Y
2.5
到
3
4
到
6
5
到
7
G
2
到
3
3
到
5
5
到
7
B
2.5
到
4
4
到
5
5
到
7
R
0
到
2
3
到
4
2.5
到
3.5
Lower looper thread and upper thread should
be well balanced with same tension. (Both looper
threads should make cross at the edge of the
fabric.)
Needle thread should not be loose or tight,
but of average tension.
Wrong side
Right side
Lower looper thread
Right-hand needle
thread
Upper looper thread
Left-hand needle
thread
Tighten the thread tension of the upper looper
(Dial
B
) or loosen the thread tension of the
lower looper (Dial
R
).
Wrong side
Right side
Lower looper thread
Right-hand needle
thread
Upper looper thread
Left-hand needle
thread
Summary of Contents for SL1A Series
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