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Upper knife arresting
Sewing very thick fabrics and workpie
ces with different ply thicknes ses:
On this machine , all kinds of fabric
from extremel y thin to extremel y thick
can be processe d. When sewing extre
mely thick fabrics or workpie ces with
different thicknes ses, the screw of the
upper knife must be tightene d, as
shown in the illustrati on.
By tightenin g screw 37, the upper
knife is arrested axially.
Note:
When sewing thin or medium fabrics,
screw 37 of the upper knife arresting
system must be loosened by about 2
turns, so that the upper knife can move
axially.
Cleaning the knives
Disenga ge the upper knife (see top of
p. 23).
Use the lint brush (accesso ries) to
remove lint from upper and lower knife.
32
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