34
Trouble shooting guide
Problem Cause Correction
Upper thread breaks
1. The machine is not threaded correctly.
2. Th
e thread tension is too tight.
3. Th
e thread is too thick for the needle.
4. Th
e needle is not inserted correctly.
5. Th
e thread is wound around the spool
holder pi
n.
6. Th
e needle is damaged.
1. R
ethread the machine.
2. R
educe the thread tension (lower
numb
er).
3. S
elect a larger needle.
4. R
emove and reinsert the needle (flat
si
de).
5. R
emove the spool of thread and rewind
the thr
ead.
6. R
eplace the needle.
Lower thread breaks
1. The bobbin case is not inserted
cor
rectly.
2. Th
e bobbin case is not threaded
cor
rectly.
3. L
int has collected in the bobbin case.
4. Th
e bobbin is damaged and doesn’t
turn smoothly.
1. R
emove and reinsert the bobbin case
and p
ull on the thread. The thread should
pull easily.
2. C
heck both the bobbin and the bobbin
case.
3. C
lean the bobbin case.
4. C
hange the bobbin.
Skipped stitches
1. The needle is not inserted properly.
2. Th
e needle is damaged.
3. Th
e wrong size and/or type of needle is
use
d.
4. Th
e presser foot is not attached
properly.
1. R
emove and reinsert the needle (flat side
towar
ds the back).
2. I
nsert a new needle.
3. C
hoose a needle to suit the thread and
fabric being us
ed.
4. C
heck the presser foot and attach
properly.
Needle breaks
1. The needle is damaged.
2. Th
e needle is not correctly inserted.
3. Th
e needle clamp screw is loose.
4. Th
e tension of the upper thread is too
ti
ght.
5. W
rong needle size for fabric.
6. Th
e pattern selector dial was turned
while th
e needle was still in the fabric.
1. R
eplace with a new needle.
2. R
einstall the needle correctly (flat side
towar
ds the back).
3. Tig
hten the needle clamp screw.
4. L
oosen the upper thread tension.
5. C
hoose a needle to suit the fabric and
the thr
ead.
6. Always turn the h
and wheel to lift the
needl
e before turning the pattern selector
dial.
Seams gather or
puc
ker
1. The thread tension is too tight.
2. Th
e machine is not threaded correctly.
1. L
oosen the upper thread tension.
2. R
ethread the sewing machine.
Note: Wh
en sewing extremely light weight
fa
brics, place a sheet of paper
undern
eath the fabric.
Stitches form loops
unde
rneath the fabric
1. The machine is not threaded correctly.
2. Th
e bobbin case is not threaded
pro
perly.
3. N
eedle/fabric/thread combination is
wron
g.
4. Th
read tension is wrong.
1. R
ethread the machine.
2. C
heck the threading of the bobbin case.
3. Th
e needle size must suit the fabric and
the thr
ead.
4. C
orrect the thread tension.
Uneven stitches,
uneve
n feed
1. Poor quality thread.
2. Th
e bobbin case is not threaded
pro
perly.
3. Fa
bric has been pulled.
1. S
elect a better quality thread.
2. R
emove the bobbin case and rethread
and rei
nsert correctly.
3. D
o not pull on the fabric while sewing, let
it be take
n in by the machine.
The machine is noisy
1. The machine needs to be lubricated.
2. F
luff or oil have collected on the hook or
needl
e bar.
3. P
oor quality oil has been used.
4. Th
e needle is damaged.
1. L
ubricate the machine.
2. C
lean the hook and feed dog as
described.
3. Use only goo
d quality sewing machine
oil.
4. R
eplace the needle.
The machine jams or
does n
ot work
1. Thread is caught in the hook race.
2. Th
e machine is not plugged in.
3. C
lutch knob is disengaged for the
bobbi
n winding.
1. R
emove thee upper thread and the
bobbi
n case. Turn the hand wheel
backwa
rds and forwards by hand and
remove th
e thread remains. Lubricate as
described.
2. P
lug the power cord into the power
so
urce.
3. E
ngage the clutch knob.
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