Brother LS2350 - Manual (Page 25)

24
2
Thread tension
The thread tension will affect the quality of your
stitches. You may need to adjust it when you change
fabric or thread.
Memo
● Before beginning to change tension
adjustments make sure the upper thread and
bobbin are inserted correctly.
● We recommend you do a test sample on a
scrap of 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 appear on the surface of the fabric.
Note
● If the bobbin thread was incorrectly
inserted, the upper thread may be too tight.
In this case, refer to “Lower threading”
(page 11) and reinsert the bobbin.
Solution
Reduce the tension by
turning the upper tension-
control dial to a lower
number.
■ Upper tension is too loose
Loops appear on the wrong side 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” (page 13) and rethread.
Solution
Increase the tension by
turning the upper tension-
control dial to a higher
number.
■ Bobbin tension is too loose
Loops may appear on the surface of the fabric
when sewing thin fabric with thin thread.
Solution
Reduce the tension by
turning the upper tension-
control dial to a lower
number.
If the problem persists, increase the tension in
the bobbin by turning the screw clockwise
with a screwdriver.
Be sure not to turn the screw more than one
full turn. In addition, be sure to return the
screw to its original position before the next
time that the machine is used.
Note
● The bobbin thread tension has been
adjusted at the factory for general use. For
most sewing applications, no adjustment is
needed.
1
2
3
4
a Wrong side
b Surface
c Upper thread
d Lower thread
1
2
3
4
5
a Wrong side
b Surface
c Upper thread
d Lower thread
e Loops appear on
surface of fabric
1
2
3
4
5
a Wrong side
b Surface
c Upper thread
d Lower thread
e Loops appear on
wrong side of
fabric
1
2
3
4
5
a Wrong side
b Surface
c Upper thread
d Lower thread
e Loops appear on
surface of fabric