Pfaff Automatic 332-260

To
check
whether
the
tensions
are
correctly
balanced,
take
a
closely
woven
piece
of
fabric
and
sew
a few
straight and
zigzag
seams.
If
the
straight
stitches
are
tightly
drawn
in
on
both
sides
of
the
fobric
(see
seam
sketch
Ill),
the
tensions
ore
correct.
The
surest
way
to
double-check
this
is
by
examining
a zigzag
seam.
If
the
zigzag seam
is equally
wide
on
surface and
underside
of
the
fabric, that
is,
if
the
threads
ore
locked
exactly
at
the
zigs
and
zags
of
the
seom,
the
tension
adjustment
is
correct.
Ctrett
7encion
7Z 9 u1ation
Balanced
tensions
are
essential
for
sewing. If your
tension
is
correct,
you
will
have
perfect
seams
as
sketched
(Ill)
below.
Sketch
I —
The
threads
interlock on
the
underside
of the
fabric.
Cause:
Upper
tension
too
loose
or
lower
tension
too
tight.
Sketch
II —
The
threads
interlock
on
the
surface
of the
fabric.
Cause:
Upper tension
too
tight
or
lower
tension
too
loose.
A
R 7374
V
22