Operation Manual

material
— remove the
needle
plate
and
thoroughly
thread
used
— change
the
needle
or
the
thread
to
give
clean
the feed dog.
the
correct
relation
between
the
two;
(see
page
5:
“Re-
7.
The
bobbin
case
has
developed a
rough edge, causing
lative
Needle
and
Thread
Sizes”).
the thread to
break
— remove
the case
and
consult
a
4.
The
thread
curls,
because
it
is
unsuitable
for
machine
sewing machine
specialist.
sewing
— use
a
different
thread.
5.
The
needle
used
is
not
of
the
correct
system
— obtain
The
under thread
breaks
correct
needles
from
the
suppliers
of
your
machine.
1.
Inferior
quality,
knotty sewing
thread
breaks easily —
use a
better
quality.
The
needle
breaks
2. The
bobbin
thread tension
is
too severe
— loosen
the
1.
The
needle
is
wrongly
inserted
— reset
the
needle.
tension
screw
(see
page
12:
“Regulating
the
Thread
The
needle
isbentorblunt
change
the
needle
(see
p.6:
Tensions”).
“Inserting
the
Needle”).
3.
The
bobbin thread
tension
is too
weak
— tighten the
2.
The
needle
used
is
too
fine
for
the
thread
or
material —
screw
with
a
screwdriver (see
page 12:
“Regulating
the
use
a
thicker
needle;
(see
page
5:
“Relative
Needle
and
Thread
Sizes”).
Thread
Tensions”).
3.
The
upper
thread
tension
is
too
severe
— loosen
the
setting
flange
on
tensioner;
(see
page
12:
“Regulating
Stitches
are
missed
the
Thread
Tensions”).
1. The
needle
has not
been set
high enough
— change
the
needle, (see
page 6:
“Inserting the
Needle”>.
Faulty
feeding
2.
The
needle
is bent
or
blunt — change the
needle.
1.
Thread
ends
or
dirt
are
interfering
with
the
free
move
3. The
needle
selected
is too
fine
or
too thick for
the
ment
of
the
feed
dog,
resulting
in
bad
feeding
of
the
20
21