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Trouble shooting guide
Problem
Upper thread breaks
Lower thread breaks
Skipped stitches
Needle breaks
Seams gather or
pucker
Stitches form loops
underneath the fabric
Uneven stitches,
uneven feed
The machine is noisy
The machine jams or
does not work
The buttonhole stitches
are not balanced
Cause
1.
The machine is not threaded correctly.
2.
The thread tension is too tight.
3.
The thread is too thick for the needle.
4.
The needle is not inserted correctly.
5.
The thread is wound around the spool
holder pin.
6.
The needle is damaged.
1.
The bobbin case is not inserted
correctly.
2.
The bobbin case is not threaded
correctly.
3.
The lower thread tension is too tight.
4.
Lint has collected in the bobbin case.
5.
The bobbin is damaged and doesn't
turn smoothly.
1.
The needle is not inserted properly.
2.
The needle is damaged.
3.
The wrong size and/or type of needle is
used.
4.
The presser foot is not attached
properly.
1.
The needle is damaged.
2.
The needle is not correctly inserted.
3.
The needle clamp screw is loose.
4.
The tension of the upper thread is too
tight.
5.
Wrong needle size for fabric.
6.
The pattern selector dial was turned
while the needle was still in the fabric.
7.
Wrong presser foot is attached for stitch
pattern selected.
1.
The thread tension is too tight.
2.
The machine is not threaded correctly.
3.
The stitch length is not correct.
1.
The machine is not threaded correctly.
2.
The bobbin case is not threaded
properly.
3.
Needle/fabric/thread combination is
wrong.
4.
Thread tension is wrong.
1.
Poor quality thread.
2.
The bobbin case is not threaded
properly.
3.
Fabric has been pulled.
1.
The machine needs to be lubricated.
2.
Fluff or oil have collected on the hook or
needle bar.
3.
Poor quality oil has been used.
4.
The needle is damaged.
1.
Thread is caught in the hook race.
2.
The machine is not plugged in.
3.
Clutch knob is disengaged for the
bobbin winding.
1.
The stitch length is not suitable for the
fabric being sewn.
2.
The fabric is being pulled or held back.
- 49 -
Correction
1.
Rethread the machine.
2.
Reduce the thread tension (lower
number).
3.
Select a larger needle.
4.
Remove and reinsert the needle (flat
side).
5.
Remove the spool of thread and rewind
the thread.
6.
Replace the needle.
1.
Remove and reinsert the bobbin case
and pull on the thread. The thread should
pull easily.
2.
Check both the bobbin and the bobbin
case.
3.
Loosen the lower thread tension.
4.
Clean the bobbin case.
5.
Change the bobbin.
1.
Remove and reinsert the needle (flat side
towards the back).
2.
Insert a new needle.
3.
Choose a needle to suit the thread and
fabric being used.
4.
Check the presser foot and attach
properly.
1.
Replace with a new needle.
2.
Reinstall the needle correctly (flat side
towards the back).
3.
Tighten the needle clamp screw.
4.
Loosen the upper thread tension.
5.
Choose a needle to suit the fabric and
the thread.
6.
Always turn the hand wheel to lift the
needle before turning the pattern selector
dial.
7.
Select the correct presser foot.
1.
Loosen the upper thread tension.
2.
Rethread the sewing machine.
3.
Readjust the stitch length.
Note: When sewing extremely light weight
fabrics, place a sheet of paper
underneath the fabric.
1.
Rethread the machine.
2.
Check the threading of the bobbin case.
3.
The needle size must suit the fabric and
the thread.
4.
Correct the thread tension.
1.
Select a better quality thread.
2.
Remove the bobbin case and rethread
and reinsert correctly.
3.
Do not pull on the fabric while sewing, let
it be taken in by the machine.
1.
Lubricate the machine.
2.
Clean the hook and feed dog as
described.
3.
Use only good quality sewing machine
oil.
4.
Replace the needle.
1.
Remove thee upper thread and the
bobbin case. Turn the hand wheel
backwards and forwards by hand and
remove the thread remains. Lubricate as
described.
2.
Plug the power cord into the power
source.
3.
Engage the clutch knob.
1.
Adjust the stitch length.
2.
Do not force the fabric for guiding.
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