Operation Manual

Balanced
tensions are
essential for
sewing.
Both
tensions are
correctly
balanced if
the
needle
and
bobbin
threads interlock
in
the
center of the
material.
The
bobbin
thread
tension
is
regulated by
turning the
small
knurled screw on the bob
bin case.
Turn this
screw
right for a
tighter
tension, or left for
a looser
tension.
If the same
size
threads are used in
the
needle and
on
the bobbin,
there is
no need
to adjust
the
bobbin thread
tension. This
tension is set
correctly
if
a
slight
resistance
has to be overcome
when pulling the
thread.
Numbers
0
to 10
indicate
different
degrees
of
tension
on the
upper
tension dial. The
higher the number,
the tighter the
tension.
For ordinary sewing
operations,
the
upper
tension
should
be
set
at about 5.
Upper tension too tight
or lower
tension too
loose.
bottom
top
bottom
top
Upper
tension too loose
or lower
tension
too
tight.
bottom
top
Both
tensions correctly
balanced.
16