Operation Manual

Upper
knife
arresting
Sewing
very
thick
fabrics
and
workpie
ces
with
different
ply
thicknesses:
On
this
machine,
all
kinds
of
fabric
from
extremely
thin
to
extremely
thick
can
be
processed.
When
sewing
extre
mely
thick
fabrics
or
workpieces
with
different
thicknesses,
the
screw
of
the
upper
knife
must
be
tightened,
as
shown
in the
illustration.
By
tightening
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
Disengage
the
upper
knife
(see
top
of
p.
23).
Use
the lint
brush
(accessories)
to
remove
lint
from
upper
and
lower
knife.
32