The needle plate is equipped with a cloth retainer. This retainer holds the
sewing material against the plunger to allow needles to insert stitches.
The cloth retainer must be set so that the sewing material cannot move as the
needle inserts stitches.
The correct positioning is important for the quality of the stitch! The pressure
of the cloth retainer against the layers of material or seam edge can be varied
by turning the screw ((1) Fig. 9a and Fig. 9b). This should be kept as small as
possible
to prevent the material from developing tension or becoming marked by the
pressure between the plunger and cloth retainer. This is particularly important
with delicate materials such as velvet.
However, the pressure must still be sufficient to ensure that the sewing material
cannot move during the needle insertion.
The cloth retainer in machines equipped with a spring-loaded plunger is
combined with an adjusting screw which limits the cloth retainer's upwards
stroke. This combination is called plunger limit stop. Plunger limit stop and the
spring-loaded plunger prevent the needle from stitching through the material
over cross seams and other thicker parts and avoid markings.
The Cl.VEB100-5 (Fig. 9d) has no real cloth retainer. During the time of needle
penetration the material is hold between folder (1) and plunger (2).
The pressure of the folder on the fabric layers should be as low as possible to
avoid any twist or marks.
This is of main importance for delicate fabrics such as e.g. velvet.
Adjustment by turning knurled nut (3), depending on the set stitch depth.
The folder should be set in a way that the fabric cannot move during needle
penetration.
This setting is of great importance with regard to the sewing quality!
Correct folder setting please see “5.3.2 Sewing with folder“.
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