Cause:
1
If
bobbin
thread
is
not
wound
cor
rectly,
it
gets entangled.
2.
Bobbin
thread
has
slipped
out
from
under
the
tension
spring.
Bobbin
thread
breaks
Remedy:
Wind
thread
properly
as
instructed
on
page
5.
Take
bobbin
out
of
bobbin
case.
replace.
and
thread
bobbin
case.
