Pfaff coverlock 4852 Owner's Manual - Page 40

dog feeds half as fast as the rear feed dog.

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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 41. The setting range is between 0.5 and 2.0. The standard setting is 1.0, 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 also depends on the set stitch length and the type of fabric being used. Set the regulator wheel for the differential feed 41 to 0.5. At this setting 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 gathering/puckering of 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 decorative effekts with the differential feed dog. For example the wavelike effect when using a rib knit (B). 38

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38
38
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
41
. The setting range is
between 0.5 and 2.0.
The
standard setting
is 1.0, 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 also
depends on the set stitch length and the type
of fabric being used.
Set the regulator wheel for the differential
feed
41
to 0.5. At this setting 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 gathering/puckering
of 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 decorative effekts with
the differential feed dog. For example the
wavelike effect when using a rib knit (
B
).