SINGER 717 Scholastic - Manual (Page 18)

f^eedle-Thread Tmsion BE8IJLATING THREAD TENSIOI^
Correct tension is important because too much
or too iittie will weaken your seams or cause
your fabric to pucker. Make a test sample with
the fabric and thread you pian to use, and ex­
amine it. A perfect stitch will have the needie
and bobbin threads locked between the two
layers of fabric with no loops on top or bottom
and no puckers.
Needle-Thread Tension
The tension dial regulates the degree of ten­
sion on your needle
threB6,
Set it according to
the type of thread and fabric you use. The
numbers
on the dial eliminate guesswork in
duplicating settings.
if the stitches in your test sample look ioose,
increase
needle-thread tension. If the fabric
puckers, decrease tension.
« To increase tension, turn dial to higher num­
ber.
^ To decrease tension, turn dial to lower num­
ber.
Bobbin-Thread Tension
Bobbin-thread tension is controiled by a screw
located on the bobbin case. You will seldom
need to adjust bobbin-thread tension since it
is usually possible to obtain the correct bal­
ance by adjusting needle-thread tension
alone.
On those rare occasions when It becomes
necessary to adjust the
bobbln-ihreab
ten­
sion, use the small tension screwdriver fur­
nished with your accessories, A very slight
turn on the screw nearest the thread slot on
the bobbin case will
produce
a noticeable
change in
bobblnAhreed
tension.
^ To increase tension, turn screw clockwise.
« To decrease tension, turn screw counter­
clockwise.
Decrease
Bobbin-Thread Tension
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