Upper tension is too tight; Upper tension is too loose - Page 28

Brother 855-X06 User Manual

2014 Dodge Charger SRT Owner Manual
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SEWING BASICS   

27

Thread tension

The tension of the thread will affect the quality of your 
stitches. You may need to adjust it when you change 
fabric or thread.

Memo

We recommend that you do a test sample 
on scrap of a fabric before you start to sew.

Correct tension

Correct tension is important as too much or too little 
tension will weaken your seams or cause puckers 
on your fabric.

Upper tension is too tight

Loops will appear on the surface of the fabric.

Note

If the bobbin thread was incorrectly 
threaded, the upper thread may be too tight. 
In this case, refer to “Lower threading” on 
page 15 and rethread the bobbin thread.

Solution
Reduce the tension by turning the upper tension 
control dial to a lower number.

Upper tension is too loose 

Loops appear on the back of the fabric.

Note

If the upper thread was incorrectly threaded, 
the upper thread may be too loose. In this 
case, refer to “Upper threading” on page 17 
and rethread the upper thread.

Solution
Increase the tension by turning the upper tension 
control dial to a higher number.

1

Surface of fabric

2

Back of fabric

3

Upper thread

4

Lower thread

1

Surface of fabric

2

Back of fabric

3

Upper thread

4

Lower thread

5

Loops appear on 
surface of fabric

1

2

3

4

1

2

3

4

5

1

Surface of fabric 

2

Back of fabric

3

Upper thread

4

Lower thread

5

Loops appear on back 
of fabric

1

2

3

4

5

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