Operation Manual

Regulating
the
Thread
Tensions
Fig.
13
III
/
/
(
If
the
tensions
ore
not
bolanced
cor
rectly,
imperfect
stitching
will
result,
os
illustrated
in
Fig.
12.
—
Upper
tension
too
loose
or
lower
tension
too
tight.
II
—
Upper
tension
too
tight
or
lower
tension
too
loose.
Ill
—
Both
tensions
balonced
correctly.
Upper
Tension
For
ordinary
sewing,
the
upper
tension
should
be
set
between
4
ond
6
on
the
tension
dial
(Fig.
13).
To
increase
the
tension,
turn
the
tension
knob
toward
+,
and
to
decrease
the
tension,
to
ward
—.
Lower
Tension
The
lower
tensjon
is
regulated
by
the
small
screw
shown
in
Fig.
14.
To
in
crease
the
tension,
turn
this
screw
clockwise,
and
to
decrease
it,
counter
clockwise,
using
a
small
screwdriver
for
this
purpose.
‘/1-:*\
)l)
N
Fig.
14
11