Brother PC 3000 - Manual (Page 25)

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THREAD TENSION
Correct upper thread tension
The thread tension is normally set on “4” for gen-
eral sewing applications. (Refer to the FABRIC/
THREAD/NEEDLE COMBINATION CHART on
page 27.)
However, the thread tension dial can be used to
adjust the tension of the upper thread in the follow-
ing cases.
* when using specialty threads or sewing on spe-
cial fabric
* when sewing gathers, shirring or shell tucks
* when the normal settings do not give the de-
sired result
The upper thread and the bobbin thread should
cross at about the center of the fabric. If the thread
tension is incorrectly set, flat attractive seams will
not be sewn or the fabric will pucker.
1 Reverse side
2 Surface
3 Upper thread
4 Bobbin thread
Loosening the upper thread tension
Turn the thread tension dial to the left to loosen the
upper thread tension.
1 Bobbin thread
2 Upper thread
3 Surface
4 If the upper thread tension is too strong,
locks appear on the surface of the fabric.
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