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Troubleshooting
guide
Problem
Cause
Correction
Upper
thread
breaks
1
.The
machine
is
not
threaded
correctly.
1
.Rethread
the
machine.
2.The
thread
tension
is
too
tight.
2.Reduce
the
thread
tension.
(lower
number>
3.The
thread
is
too
thick
for
the
needle.
3.Select
a
larger
needle.
4.The
needle
is
not
inserted
correctly.
4.Remove
and
reinsert
the
needle.
(flat
side
towards
the
back)
5.The
thread
is
wound
around
the
spool
holder
pin.
5.Remove
the
spool
and
thread
from
the
spool
holder
pin.
6.The
needle
is
damaged.
6.Replace
the
needle.
Lower
thread
breaks
1
.The
bobbin
case
is
not
inserted
correctly.
1
Remove
and
reinsert
the
bobbin
case
and
pull
on
the
thread.
The
thread
2.The
bobbin
case
is
threaded
wrong.
should
pull
easily.
3.The
lower
thread
tension
is
too
tight.
2.Check
both
bobbin
and
bobbin
case.
3.Loosen
lower
thread
tension
as
described.
Skipped
stitches
1
.The
needle
is
not
inserted
correctly.
1
.Remove
and
reinsert
needle.
(flat
side
towards
the
back>
2.The
needle
is
damaged.
2.lnsert
a
new
needle.
3.The
wrong
size
needle
has
been
used.
3.Choose
a
needle
to
suit
the
thread
and
fabric.
4.The
foot
is
not
attached
correctly.
4.Check
and
attach
correctly.
Needle
breaks
1
The
needle
is
damaged.
1
Insert
a
new
needle.
2.The
needle
is
not
correctly
inserted.
2.lnsert
the
needle
correctly.
(flat
side
towards
the
back)
3.Wrong
needle
size
for
the
fabric.
3.Choose
a
needle
to
suit
the
thread
and
fabric.
4.The
wrong
foot
is
attached.
4.Select
the
correct
foot.
Loose
stitches
1
.The
machine
is
not
correctly
threaded.
1
Check
the
threading.
2.The
bobbin
case
is
not
correctly
threaded,
2.Thread
the
bobbin
case
as
illustrated.
3.Needle/
fabric)
thread
combination
is
wrong.
3.The
needle
size
must
suit
the
fabric
and
thread.
4.Thread
tension
wrong.
4.Correct
the
thread
tension.
Seams
gather
or
1
The
needle
is
too
thick
for
the
fabric.
1
Select
a
finer
needle.
pucker
2.The
stitch
length
is
wrong
adjusted.
2.Readjust
the
stitch
length.
3.The
thread
tension
is
too
tight.
3.Loosen
the
thread
tension.
Uneven
stitches,
1
.Poor
quality
thread.
1
Select
a
better
quality
thread.
uneven
feed
2.The
bobbin
case
is
wrong
threaded.
2.Remove
bobbin
case,
thread
and
insert
correctly.
3.Fabnc
has
been
pulled.
3.Do
not
pull
on
the
fabric
while
sewing,
let
it
be
taken
up
by
the
machine.
The
machine
is
noisy
1
Fluff
or
oil
have
collected
on
the
hook
or
needle
bar.
1
.Clean
the
hook
and
feed
dog
as
described.
2.The
needle
is
damaged.
2.Replace
the
needle
The
machine
jams
Thread
is
caught
in
the
hook.
Remove
the
upper
thread
and
bobbin
case,
turn
the
handwheel
backwards
and
forwards
by
hand
and
remove
the
thread
remands.
33
36


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