Operation Manual

9.
Drawing
Up
the
Bobbin
Thread
Hold the end
of the needle
thread and
turn the balance
wheel toward
you, as
indicated
by
an
arrow
in Fig. 1, until
the needle
moves down
and up
again.
As the needle
moves
up, it
catches
the bobbin
thread
which
comes
up with
it
through the needle
hole. Lay
both threads
back
under the presser
foot, place
the material
in the machine
and lower
the presser
foot. Hold
the ends
of both
threads
until
the machine
has made
a few
stitches.
10. Regulating
the
Thread Tensions
Adjusting the
Upper Tension
Turn tension
nut M (Fig.
8) clockwise
for more
tension, or
counter-clockwise
for less
tension.
If the upper
tension is
too
loose,
the bobbin
thread will
draw the needle
thread
down
so
that it
forms small
kinks on
the underside
of the material,
as shown
in
Fig. 9.
If the
upper
tension
is too tight,
the bobbin
thread
will be pulled
up
(Fig. 10)
or
the
needle
thread will
break.
Both
tensions are
correctly
balanced,
if
the needle
and bobbin
threads interlock
in
the
center
of the material,
as
shown in Fig.
11.
Fig.
9
Fig.
10
Fig. 11
When
you raise the
presser
bar,
the upper
tension is
released automatically
so that
the
work
can be easily
removed
from the
machine.
To
do this, pull
the work
back (in
for
ward
feeding direction),
never
forward
as this
may cause
bending
of the needle,
skipping
of
stitches
or
thread breaking.
Upper
tension
too loose
or lower
tension
too
tight
Upper
tension
too
tight
or
lower
tension
too loose
Both
tensions
properly
balanced
9