Operation Manual

Basic
RuIe Always
make sure
the take-up lever
is
n
its highest
position when beginning or
end
ing
a seam.
Failure to
observe this
precau
tion
may
cause
thread iamming or unthread
ng of the needle.
If observed, it is
not
necessary to
hold the
threads when
begin
ning
to
sew.
6.
Regulating
the Thread Tensions
The tension on the needle
thread is
increased
by
turn
ing
tension nut
M (Fig. 11) to the
right,
and decreased
by turning it to
the left, Numbers
and marks stamped
on the
tension regulator cup
greatly help in restoring
the
correct
tension for any particular
sewing
job.
The
bobbin thread
tension is
regulated by means of
a
small
screw driver. The
tension
is increased
by
turn.
ing
screw S
(Fig. 12) clockwise, and
decreased
by
turn
ing
it counter-clockwise.
To
obtain a
perfect seam, observe the following
rules:
The needle and bobbin threads
should
be
locked in
the
center of the fabric, as
shown
in
Fig. 13.
Fig. 11
Fig, 12
8