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Thread
tension
t_ Note:
The bobbin
thread
tension
has
been
adjusted
at the factory
and
readjustment
is
usua//y
not
required
Lower thread tension
To
test
the
bobbin
thread
tension, remove the bobbin case
and
bobbin
from the machine
and
hold
the
bobbin
case
suspended
by the thread. Shake
it once or twice. If the tension is
correct,
the thread witt unwind
by about an inch or two. If the
tension
is too tight,
it wilt not
unwind.
If the tension
is too
loose, the thread wilt unwind for
more than two inches.
To adjust, turn the small screw
on the side of the bobbin case.
(1)
Upper thread tension
Basic thread tension setting: "4". (2)
To increase the tension, turn the dial up to a higher number. To reduce the tension, turn
the dial to a lower number.
A. Normal thread tension.
B. Thread tension too loose.
C. Thread tension too tight.
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