Pfaff coverlock 4852 Owner's Manual page 41

Set the regulator wheel for the differential
feed 41 to 2.0.
Here the front feed dog feeds twice as fast
as the rear feed dog. This means that the
front feed dog feeds twice as much fabric
as the rear feed dog, causing the material to
gather.
The following table contains information on the differential feed settings. However, you
should always test your setting fi rst on a piece of scrap fabric.
Type of fabric / effect
Very light fabrics: silk, satin, poplin, taffeta, linings.
Normal fabrics: light and medium-heavy cottons, fi ne cords,
thermal-wear.
Light knitwear: jerseys, polo fabrics, cut-pile pullovers, tricot,
fi ne knitwear and gathered fabrics.
Heavy knitwear: sweatshirt fl eece, heavy gathered fabrics,
heavy knitwear.
Stretch - wavelike effect: medium and light knitwear, jerseys,
knitwear, ruffl ed sleeve and collar edges, skirt hems, dense
stitch lengths.
Gathering: ruffl ing light materials and lace, seam allowances
for curves, arches on blouses, shirts, skirts, round pockets,
fl aps, stretching or gentle ruffl ing of arched sleeves
(shoulders), sleeve widths for cuffs or gathered fabrics.
Here you will avoid stretching in the seam
when working with knitwear, such as jerseys
or gathered fabrics. Instead, a smooth seam
(A) will be achieved.
You can also achieve decorative effects
with the differential feed dog. For example
the gathering effect when using very light
fabrics (B).
Differential feed setting
gather
<2.0>
normal stretch
<1.0> <0.5>
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