Thread Tension (3 threads)
Correct tension
The illustration at left shows sewing results with
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correct tension settings. However, adjusting the
thread tension may be required depending on the
type of fabric and thread being used.
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Wrong side of fabric
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Right side of fabric
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Right or left needle thread
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Upper looper thread
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Lower looper thread
Thread tension adjustment
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*
Set three thread tension dials at “3”.
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Then sew, and check the thread tensions.
If the tension balance on the test piece is not
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0
1
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satisfactory, you can adjust the thread tension
with thread tension dial.
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Thread tension dial
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Setting mark
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Loosen
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Tighten
Needle thread tension is too loose
The illustration shows sewing results when the
needle thread tension is too loose.
Remedy:
Tighten needle thread tension.
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Left needle thread tension dial
1
Right needle thread tension dial
Looper thread tension is out of balance (1)
The illustration shows sewing results when the lower
looper thread tension is too tight and/or upper
looper thread tension is too loose.
Remedy:
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Loosen lower looper thread tension and/or tighten
upper looper thread tension.
2
Upper looper thread tension dial
3
Lower looper thread tension dial
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Looper thread tension is out of balance (2)
The illustration shows sewing results when the upper
looper thread tension is too tight and/or lower looper
thread tension is too loose.
Remedy:
Loosen upper looper thread tension and/or tighten
lower looper thread tension.
2
Upper looper thread tension dial
!3
Lower looper thread tension dial
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