Pfaff 362-261 Owner's Manual - Page 21

Correct, Tension, Regulation

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R8150 Correct Tension Regulation Balanced tensions are essential for sewing. If your tension is correct, you will have perfect seams as sketched below (Ill). Sketch I - The threads interlock on the underside of the fabric. Cause: Upper tension too loose or lower tension too tight. Sketch II - The threods interlock on the surface of the fabric. Cause: Upper tension too tight or lower tension too loose. V A To check whether the tensions are correctly bal anced, 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 fabric (see seam sketch Ill), the tensions are correct. The surest way to double-check this is by eyamining a zigzag seam. If the zigzag seam is equally wide on surface and underside of the fabric, that is, if the threads are locked exactly at the zigs and zags of the seam, the tension adjust ment is correct. 20 --1 - - - - -- I I j. 1 I

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Correct
Tension
Regulation
Balanced
tensions
are
essential
for
sewing.
If
your
tension
is
correct,
you
will
have
perfect
seams
as
sketched
below
(Ill).
Sketch
I
The
threads
interlock
on
the
underside
of
the
fabric.
Cause:
Upper
tension
too
loose
or
lower
tension
too
tight.
Sketch
II
The
threods
interlock
on
the
surface
of
the
fabric.
Cause:
Upper
tension
too
tight
or
lower
tension
too
loose.
To
check
whether
the
tensions
are
correctly
bal
anced,
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
fabric
(see
seam
sketch
Ill),
the
tensions
are
correct.
The
surest
way
to
double-check
this
is
by
eyamining
a
zigzag
seam.
If
the
zigzag
seam
is
equally
wide
on
surface
and
underside
of
the
fabric,
that
is,
if
the
threads
are
locked
exactly
at
the
zigs
and
zags
of
the
seam,
the
tension
adjust
ment
is
correct.
R8150
A
V
I
I
j.
1
I
20
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