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Troubleshooting Guide
PROBLEM
CAUSE
1. The machine is not threaded correctly.
Upper thread
2. The thread tension is too tight.
breaks
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.
Lower thread
The bobbin case is threaded wrong.
breaks
Skipped
1. The needle is not inserted correctly.
stitches
2. The needle is damaged.
3. The wrong size needle has been used.
4. The foot is not attached correctly.
1. The needle is damaged.
Needle breaks
2. The needle is not correctly inserted.
3. Wrong needle size for the fabric.
4. The wrong foot is attached.
Loose stitches
1. The machine is not correctly threaded.
2. The bobbin case is not correctly threaded.
3. Neddle/fabric/thread combination is wrong.
4. Thread tension wrong.
Seams gather
1. The needle is too thick for the fabric.
or pucker
2. The stitch length is adjusted wrong.
3. The thread tension is too tight.
Uneven
1. Poor quality thread.
stitches,
2. The bobbin case is threaded wrong.
uneven feed
3. Fabric has been pulled.
The machine is
1. Lint or oil have collected on the hook or needle
noisy
bar.
2. The needle is damaged.
The machine
Thread is caught in the hook.
jams
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. Remove the reel and wind thread onto reel.
6. Replace the needle.
Remove bobbin from bobbin case. Reinsert and
rethread bobbin correctly.Pull on the thread. The
thread should pull easily.
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. 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. Select a finer needle.
2. Readjust the stitch length.
3. Loosen the thread tension.
1. Select a better quality thread.
2. Remove bobbin from bobbin case. Reinsert
and rethread bobbin correctly.
3. Do not pull on the fabric while sewing. Let the
feed dogs pull the fabric under the foot.
1. Clean the hook and feed dog as described.
2. Replace the needle.
Remove the upper thread. Gently rock the
handwheel backward and forward by hand
and remove the thread from the bobbin area.
Rethread the upper thread.
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