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Troubleshooting guide
Problem
1.
2.
3.
Upper thread tears
4.
5.
6.
1.
Lower thread breaks
2.
1.
2.
Skipped stitches
3.
4.
1.
2.
Needle breaks
3.
4.
1.
2.
Loose stitches
3.
4.
The seams contract or
1.
gather
2.
3.
Irregular stitches
1.
Irregular feed
2.
3.
4.
The sewing machine is
1.
loud and gruff
2.
3.
4.
5.
The sewing machine jams
1.
NOTE
If the problem is still not solved, please contact your customer services.
NOTE
During sewing, if the thread has been jammed inside the looper and needle movement stops. If you continue to sew, the sewing machine will stop
automatically due to safety. If the sewing machine stops, please turn off the machine first and then turn on again.
Cause
The machine is not correctly threaded.
The thread tension is too high.
The thread is too thick for the needle.
The needle is not correctly inserted.
The thread has become wound around the bobbin
winder spindle (17).
The needle is damaged.
The lower thread bobbin is not inserted correctly in
the bobbin case.
The lower thread is threaded incorrectly.
The needle is not correctly inserted.
The needle is damaged.
The wrong size needle has been used.
The wrong presser foot is attached.
The needle is damaged.
The needle is not inserted correctly.
Fabric too thick / needle size wrong.
The wrong presser foot is attached.
The sewing machine is not correctly threaded.
The lower thread is not threaded correctly.
Needle/fabric/thread combination is wrong.
Thread tension wrong.
The needle is too thick for the fabric.
The lower thread is not threaded correctly.
Fabric has been pulled when sewing.
The thread is too weak.
The lower thread bobbin is not inserted correctly in
the bobbin case.
The lower thread is threaded incorrectly.
Fabric has been pulled when sewing.
Fluff or oil have collected on the looper or needle
bar.
The needle is damaged.
Slight humming sound coming from internal motor.
Thread is caught in the looper.
The feed dog is dirty with lint.
Thread is caught in the looper.
Correction
1.
Thread the yarn again.
2.
Loosen the thread tension (3).
3.
Select a larger needle size.
4.
Remove and reinsert the needle (flat side towards the
back).
5.
Remove the bobbin (g) and unwind the thread.
6.
Replace the needle.
1.
Insert the lower thread bobbin correctly.
2.
Tread the lower thread again
1.
Remove and reinsert the needle (flat side towards the
back).
2.
Replace the needle.
3.
Choose a needle size to suit the thread and fabric.
4.
Select the correct presser foot.
1.
Replace the needle.
2.
Insert the needle correctly (flat side towards the
back).
3.
Choose a needle size to suit the thread and fabric.
4.
Select the correct presser foot.
1.
Thread the sewing machine correctly.
2.
Thread the lower thread correctly.
3.
The needle size must suit the fabric and thread.
4.
Correct the thread tension.
1.
Select a finer needle.
2.
Thread the lower thread correctly.
3.
Use a suitable backing for fine or stretchy textiles.
1.
Use stronger thread.
2.
Insert bobbin correctly
3.
Thread the lower thread correctly.
4.
Do not pull on the fabric. It must be automatically
moved by the sewing machine.
1.
Clean the looper and feed dog.
2.
Replace the needle.
3.
This is normal.
4.
Remove the upper thread and bobbin case, turn the
handwheel (25) backwards and forwards.
5.
Remove thread remnants.
1.
Remove the upper thread and the bobbin case. Turn
the handwheel (25) back and forth and remove the
thread remnants.
Troubleshooting
EN
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