Brother Sewing Machine Operation Manual page 62

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SEWING BASICS
■ Upper thread is too tight
If the bobbin thread is visible from the right side
of the fabric, the upper thread is too tight.
Note
If the bobbin thread was incorrectly
threaded, the upper thread may be too tight.
In this case, refer to "Installing the bobbin"
(page 29) and rethread the bobbin thread.
a Wrong side of fabric
b Right side of fabric
c Upper thread
d Bobbin thread
e The bobbin thread is visible from the right side of
the fabric.
Each press of makes the thread tension looser.
60
■ Upper thread is too loose
If the upper thread is visible from the wrong side
of the fabric, the upper thread is too loose.
Note
If the upper thread was incorrectly threaded,
the upper thread may be too loose. In this
case, refer to "Upper Threading" (page 31)
and rethread the upper thread.
a Wrong side of fabric
b Right side of fabric
c Upper thread
d Bobbin thread
e The upper thread is visible from the wrong side of
the fabric.
Each press of makes the thread tension tighter.
Memo
Press to return the setting to its
default.
Note
If the upper thread is not threaded correctly
or the bobbin is not installed correctly, it
may not be possible to set the correct thread
tension. If the correct thread tension cannot
be achieved, rethread the upper thread and
insert the bobbin correctly.