A SERVICE OF

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DIFFERENTIAL
FEED
APPLICATIONS
Please
refer
to
pages
42
-
45
DIFFERENTIAL
FEED.
Differential
feed
is
designed
to
minimize
puckering
and
wavering.
It
is
also
very
effective
for
gathering.
1.
Puckering
Puckering
tends
to
occur
on
woven
or
sheer
fabrics.
To
obtain
pucker-free
seams,
set
the
differential
feed
control
dial
at
less
than
1.
2.
Wavering
Wavering
tends
to
occur
on knitted
or
stretchable
fabrics.
To
obtain
waver-free
seams,
set
the
differential
feed
control
dial
at
more
than
1.
3.
Gathering
Differential
feed
makes
gathering
easier
on
lightweight
fabric.
Use
it
on
waistlines,
sleeve
heads,
sleeve
bottoms
and
ruffles,
etc.
Set
the
differential
feed
control
dial
between
1.5
and
2
to
obtain
the
best
gathering
effect
for
your
use.
IMPORTANT
The
exact
adjustment
depends
on
the
thickness
and
elasticity
of
fabric.
Even
the
stitch
length
can
influence
the
setting.
The
longer
the
stitches,
the
more
the
fabric
is
contracted.
Always
do
a
test
run
with
a
piece
of
actual
fabrics
you
use
and
find
the
best
settings.
Illustration
*
I
:
Pucker
or
waver-free
seams
*
II:
Puckering
*
III:
Wavering
*IV:
Gathering
*11
*1
*ffl
*‘v