Pfaff coverlock 4872 Owner's Manual - Page 42

smooth seam

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Differential feed The differential feed consists of two feed dogs (A + B), one behind the other, which feed the fabric. The movement of the front feed dog (A) and thus the amount of material to be fed can be regulated using the regulator wheel 49. The setting range is between 0.5 and 2.0. The standard setting is 10, where the movement of the front feed dog (A) is synchronized with the rear feed dog (B). This means that the front feed dog feeds the same amount of fabric as the rear feed dog. Note: The function of the differential feed is independent of the set stitch length and the type of fabric being used. A Set the regulator wheel for the differential feed 49 to 0.5. Here the front feed dog feeds half as fast as the rear feed dog. This means that the front feed dog feeds only half as much fabric as the rear feed dog, causing the fabric to stretch. Here you will avoid ruffling in the seam when working with very light fabrics, such as silk and taffeta. Instead, a smooth seam (A) will be achieved. You can also achieve fashionable effects with the differential feed dog, for example the wavelike effect when using a rib knit (B). 38

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Differential
feed
The
differential
feed
consists
of
two
feed
dogs
(A
+
B),
one
behind
the
other, which
feed
the
fabric. The
movement
of
the
front
feed
dog
(A)
and
thus
the
amount
of
material
to
be
fed
can
be
regulated
using
the
regulator
wheel
49.
The
setting
range
is
between
0.5
and
2.0.
The
standard
setting
is
10,
where
the
movement
of
the
front feed
dog
(A)
is
synchronized
with
the
rear feed dog
(B).
This
means
that
the
front
feed dog
feeds
the
same amount
of
fabric
as
the
rear
feed
dog.
Note:
The
function
of
the
differential
feed
is
independent
of
the
set
stitch
length
and
the
type
of
fabric
being
used.
Set
the
regulator
wheel
for
the
differential
feed
49
to
0.5.
Here
the
front
feed
dog
feeds
half
as
fast
as
the
rear
feed
dog.
This
means
that
the
front
feed
dog
feeds
only
half
as
much
fabric
as
the
rear
feed
dog,
causing
the
fabric
to
stretch.
Here
you
will
avoid
ruffling
in
the
seam
when
working
with very
light
fabrics,
such
as
silk
and
taffeta. Instead,
a
smooth seam
(A)
will
be
achieved.
You
can
also achieve
fashionable
effects
with
the
differential
feed
dog,
for
example
the
wavelike
effect
when
using
a
rib knit
(B).
A
38