Adjusting top thread tensions, Adjusting bobbin tensions – SINGER W1550 User Manual
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ADJUSTING TOP THREAD
TENSIONS
Probably the most important control on
your machine is this one that regulates
your top thread tension.
There are many reasons for having to
reset your tension. The best tension for
An ideal straight stitch will have
threads locked between the two
layers of fabric.
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one fabric may not be correct for
another. The recjulred tension depènds
upon the stiffness of the fabric, thickness
of the fabric, numbers of layers of fabric
being sewn, as well as the type of stitch
you are making.
It is best to test the stitching on a scrap
of the fabric you are using before starting
to make a garment. Use the straight
stitch function as shown at the right.
ADJUSTING BOBBIN TENSIONS
Bobbin tension requires adjusting less
frequently than the upper thread ten^
sion.
If the stitch is satisfactory but the seam
is puckered, it may be necessary to
loosen the tension on both the top and
bottom threads. Be sure to balance
them.
When adjusting the tension on the bobbin
case, make slight adjustments with a
screw driver.
Decrease Tension ( o
Upper thread too loose
Increase Tension
DECREASE TENSION
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