Pfaff creative 4874, Instruction Manual, Page: 48 / 144

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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
fi ne fabrics such as silk and taffeta you can
prevent puckering of the seam. The seam
will remain fl at (A).
But you can also use it to achieve
fashionable effects such as the “lettuce
edge” with a rolled edge (B).
A
B