Pfaff 645F Owner's Manual - Page 17

Tension, Upper, Thread

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TENSION OF UPPER THREAD Tension on the upper thread can be easily adjusted by turning dial on front of the tension discs. Your machine, has been set at the factory for even thread tension at 6 setting. However, you may have to adjust the tension when using different threads or sewing on fabrics of dif ferent thicknesses. Loosen tension somewhat when zig-zag stitching. The wider the zig-zag, the less tension needed. Use 3 setting when sewing buttonholes, monogram ing and embroidering. Test tension before you sew by stitch ing on a scrap of the same fabric and through the same amount of layers. Correct tension: needle and bobbin threads are locked in center of seam. Upper thread too loose: increase tension by turning dial down-ward. Upper thread too tight: reduce tension by turning dial up-ward. 13-

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TENSION
OF
UPPER
THREAD
Tension
on
the
upper
thread
can
be
easily
adjusted
by
turning
dial
on
front
of
the
tension
discs.
Your
machine,
has
been
set
at
the
factory
for
even
thread
tension
at
6
setting.
However,
you
may
have
to
adjust
the
tension
when
using
different
threads
or
sewing
on
fabrics
of
dif
ferent
thicknesses.
Loosen
tension
somewhat
when
zig-zag
stitching.
The
wider
the
zig-zag,
the
less
tension
needed.
Use
3
setting
when
sewing
buttonholes,
monogram
ing
and
embroidering.
Test
tension
before
you
sew
by
stitch
ing
on
a
scrap
of
the
same
fabric
and
through
the
same
amount
of
layers.
Correct
tension:
needle
and
bobbin
threads
are
locked
in
center
of
seam.
Upper
thread
too
loose:
increase
tension
by
turning
dial
down-ward.
Upper
thread
too
tight:
reduce
tension
by
turning
dial
up-ward.
13—