10
Thread tension dial
IMPORTANT
- Make sure that the threads are properly seated
in the tension dials.
There is a thread tension dial for each needle
thread, the lower looper thread and the upper
looper thread. The correct thread tension may
vary according to the type and thickness of the
fabric and the type of thread used. Thread tension
adjustments may be necessary for any change in
sewing materials.
1
Yellow marked tension dial is for left needle.
2
Green marked tension dial is for right needle.
3
Pink marked tension dial is for upper looper.
4
Blue marked tension dial is for lower looper.
Tension control
Sewing is possible at position "4" for most
circumstances. (Standard: SPAN 60/2Z)
If the stitch quality is insufficient, select a different
tension setting.
$!
<A> Tension selection mark
1
For heavy tension: 4 to 7
2
For light tension: 4 to 2
3
For medium tension: 5 to 3
If you cannot find the correct tension, see
"Examples of thread tension adjustment".
Examples of thread tension adjustment
For correct overlock stitching, the looper threads
and needle threads should be as described below.
• The upper looper thread and the lower looper
thread are intertwined at the edge of the fabric.
• There is no looping in the needle threads on
either the surface or the reverse of the fabric.
If the overlock stitching does not sew correctly,
adjust the thread tension.
Move the thread tension dial by a half or quarter
scale marking, and then continue sewing trial
stitching and making adjustments.
Left needle thread forms loops on reverse of
fabric
$
&
%
A: Reverse
B: Surface
C: Left needle thread
Increase the tension of the left needle thread.
Right needle thread forms loops on reverse of
fabric
$
%
'
A: Reverse
B: Surface
D: Right needle thread
Increase the tension of the right needle thread.
