Thread tension dials are already adjusted for general sewing at factory, however, if you
want to adjust much stronger or weaker fr special sewing, it can be adjusted as follows:
To adjust:
1. Pull out the thread tension dial.
2. Turn the dial knob leading screw to adjust the thread tension to direction of:
A to get weaker thread tension.
B to get stronger thread tension.
3. Set the tension dial number "3" with stopper, and insert the thread tension dial.
Correct setting for general sewing:
When each dial is set at "3" and No. 50 polyester filament thread is used, the thread
should be as follows;
Needle (Left) :
Needle (right):
Upper looper:
Lower looper:
When each dial is set at "9" and No. 50 polyester filament thread is used, the thread
tension should be as follows;
Needle (Left) :
Needle (right):
Upper looper:
Lower looper:
TO ADJUST THE THREAD TENSION DIALS
33~53 g
14~24 g
11~21 g
23~33 g
150 g or more
57 g or more
45 g or more
140 g or more
Direction A
Stopper
Dial knob leading screw
Direction B
Thread tension dial
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990D