Pfaff creative coverlock 4874 Owner's Manual - Page 48

AA BB

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Note: The effect of the differential feed also depends on the stitch length selected and the type of fabric being used. Differential feed The differential feed consists of two feed dogs arranged one behind the other. Both feed dogs (A + B) move the fabric. The movement of the front feed dog (A) can be regulated using the differential feed adjustment buttons (15). The setting range is from 0.5 to 2. This setting regulates the amount of material being fed by the front feed dog. The creative 4874 selects the differential feed automatically, but it can be changed at any time using the setting buttons (15) and can be stored (see page 3-4). The default setting is 1; with this setting, the movement of the front feed dog (A) is synchronized with that of the rear feed dog (B), which means that the front feed dog advances the same quantity of fabric as the rear feed dog. B A If you set the differential feed to 0.5 the front feed dog moves at half the speed of the rear feed dog. This means that the front feed dog feeds only half as much fabric as the rear feed dog. This stretches the fabric. This way, when you are working with very fine fabrics such as silk and taffeta you can A prevent puckering of the seam. The seam will remain flat (A). But you can also use it to achieve fashionable effects such as the "lettuce edge" with a rolled edge (B). B 2-34

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2-34
Differential feed
The differential feed consists of two feed
dogs arranged one behind the other.
Both feed dogs (A + B) move the fabric.
The movement of the front feed dog (A)
can be regulated using the differential
feed adjustment buttons (15). The setting
range is from 0.5 to 2. This setting
regulates the amount of material being
fed by the front feed dog.
The creative 4874 selects the differential
feed automatically, but it can be changed
at any time using the setting buttons (15)
and can be stored (see page 3-4).
The default setting is 1; with this setting,
the movement of the front feed dog (A)
is synchronized with that of the rear feed
dog (B), which means that the front feed
dog advances the same quantity of fabric
as the rear feed dog.
Note:
The effect of the
differential feed also depends
on the stitch length selected
and the type of fabric being
used.
If you set the differential feed to 0.5 the
front feed dog moves at half the speed
of the rear feed dog. This means that the
front feed dog feeds only half as much
fabric as the rear feed dog. This stretches
the fabric.
A
B
This way, when you are working with very
fine fabrics such as silk and taffeta you can
prevent puckering of the seam. The seam
will remain flat (A).
But you can also use it to achieve
fashionable effects such as the “lettuce
edge” with a rolled edge (B).
A
B