Pfaff Cover Style 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 normal stretch
<2.0> <1.0> <0.5>
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