Singer 591D300A - Setting Thread Tensions; Balancing Needle and Bobbin Thread Tensions; Adjusting Needle Thread Tension; Adjusting Bobbin Thread Tension

AJ
PERFECT STITCH
NEEDLE THREAD TENSION TOO TIGHT
CI
NEEDLE THREAD TENSION TOO LOOSE
Fig. 15
Fig. 16
MORE LESS
TENSION TENSION
MORE
031
TENSION
LESS TENSION
Fig. 17
10
SETTING THREAD TENSIONS
Normally, tension on the needle
and bobbin threads should be
balanced so that if you were to
look at a cross section of a line of
stitching, the needle and bobbin
threads would be locked in the
center of the thickness of the ma
terial as shown in Fig. 15-A. Incor
rect settings will produce the condi
tions as shown in Figs. 15-B and 15-
C.
Regulate the needle thread tension
as shown in Fig. 16. Be sure the
presser foot is down when making
tension adjustments.
Tension on the needle thread
should be just enough to set the
stitch properly in the material. See
Fig. 15-A.
For average sewing, the tension on
the bobbin thread should be very
light.
Should regulation of the tension on
the bobbin thread be necessary, re
move the bobbin case and adjust
as shown in Fig. 17.
From the library of: Superior Sewing Machine & Supply LLC