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A
C
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B
D
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Thread tension
Upper thread tension
Basic thread tension setting: "4"
To increase
the tension,
turn the dial to the next number
up. To
reduce the tension,
turn the dial to the next number
down.
A. Normal thread tension for straight
stitch sewing.
B. Thread
tension
too loose for straight
stitch sewing.
Turn dial to
higher number.
C. Thread
tension
too tight for straight
stitch sewing.
Turn dial to
lower number.
D. Normal
thread
tension
for zig
zag
and decorative
sewing.
Correct
thread
tension
is when
a small amount
of the upper
thread appears
on the bottom side of fabric.
Lower thread tension
To test the bobbin
thread
tension,
remove
the bobbin
case and
bobbin
and hold it by suspending
it by the thread.
Jerk it once or
twice. If the tension
is correct,
the thread
will unwind
by about an
inch or two. If the tension
is too tight, it does not unwind
at all. If
the tension
is too loose, it will drop too much.
To adjust, turn the
small screw on the side of the bobbin case.
Please note:
- Proper setting of tension is important
to good sewing.
-There
is no single
tension
setting
appropriate
for
all stitch
functions,
thread
or fabric.
-A
balanced
tension
(identical
stitches
both top and bottom)
is
usually only desirable
for straight stitch construction
sewing.
- 90% of all sewing will be between
"3" and "5".
-For
zig
zag
and
decorative
sewing
stitch
functions,
thread
tension should generally
be less than for straight
stitch sewing.
- For all decorative
sewing
you will always
obtain
a nicer stitch
and less fabric puckering
when the upper thread
appears
on the
bottom side of your fabric.
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