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Trouble shooting guide
Problem
Upper thread breaks
Lower thread breaks
Skipped stitches
Needle breaks
Loose stitches
Seams gather or pucker
Uneven stitches, uneven
feed
The machine is noisy
The machine jams
Cause
1.The
2.The
3.The
4.The
machine is not threaded correctly.
thread tension is too tight.
thread is too thick for the needle.
needle is not inserted correctly.
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 towards the back)
5.The
6.The
1.The
2.The
3.The
thread is wound around the spool holder pin.
needle is damaged.
bobbin case is not inserted correctly.
bobbin case is threaded wrong.
lower thread tension is too tight.
1.The needle is not inserted correctly.
2.The needle is damaged.
3.The wrong size or type of needle has been used.
5.Remove the reel and wind thread onto reel.
6.Replace the needle.
1.Remove and reinsert the bobbin case and pull on the thread.
The thread should pull easily.
2.Check both bobbin and bobbin case.
3.Loosen lower thread tension as described.
1.Remove and reinsert needle. (flat side towards the back)
2.Insert a new needle.
3.Choose a needle to suit the thread and fabric.
4.The foot is not attached correctly.
1.The needle is damaged.
2.The needle is not correctly inserted.
3.Wrong needle size for the fabric.
4.The wrong foot is attached.
1.The machine is not correctly threaded.
2.The bobbin case is not correctly threaded.
3.Needle/fabric/thread
combination is wrong.
4.Thread tension wrong.
4.Check and attach correctly.
1.Insert a new needle
2.Insert the needle correctly. (flat side towards the back)
3.Choose a needle to suit the thread and fabric.
4.Select the correct foot.
1.Check the threading.
2.Thread the bobbin case as illustrated.
3.The needle size must suit the fabric and thread.
4.Correct the thread tension.
1.The needle is too thick for the fabric.
2.The stitch length is incorrectly adjusted.
3.The thread tension is too tight.
1.Poor quality thread.
2.The bobbin case is incorrectly threaded.
3.Fabric has been pulled.
1.The machine must be lubricated.
2.Lint or oil have collected on the hook or needle bar.
3.Poor quality oil has been used.
1.Select a finer needle.
2.Readjust the stitch length.
3.Loosen the thread tension.
1.Select a better quality thread.
2.Remove bobbin case, thread and insert correctly.
3.Do not pull on the fabric while sewing, let it be taken up by the machine.
1.Lubricate as described.
2.Clean the hook and feed dog as described.
3.Only use good quality sewing machine oil.
4.The needle is damaged.
Thread is caught in the hook.
4.Replace the needle.
Remove the upper thread and bobbin case, turn
backwards and forwards by hand and remove the thread.
Lubricate as described.
84
the handwheel
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