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