APPENDIX
Symptom | Probable Cause | Remedy | Reference | |
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The lower thread is |
| Incorrect bobbins will not work |
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A bobbin designed specifically for | properly. Only use a bobbin | page 22 | ||
tangled or breaks. | this machine is not used. | designed specifically for this | ||
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| machine. |
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The thread is |
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tangled on the | The upper thread was not | Correct the upper threading. | page 32 | |
wrong side of the | threaded correctly. | |||
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fabric. |
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| Correct the upper threading. |
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| The upper thread was not | Make sure that the thread is hanged | page 32, | |
| on the thread guide spring which is | |||
| threaded correctly. | page 33 | ||
| on the left side of the thread guide | |||
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| cover. |
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| The bobbin thread is incorrectly | Correctly install the bobbin thread. | page 27 | |
| installed. | |||
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| The combination of fabric, thread | Select a thread and needle that are |
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| appropriate for the type of fabric | page 39 | ||
The thread tension | and needle is not correct. | |||
being sewn. |
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is incorrect. |
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| The presser foot holder is | Correctly install the presser foot | page 45 | |
| incorrectly installed. | holder. | ||
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| The thread tension is incorrect. | Adjust the tension of the upper | page 62 | |
| thread. | |||
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| Incorrect bobbins will not work |
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| A bobbin designed specifically for | properly. Only use a bobbin | page 22 | |
| this machine is not used. | designed specifically for this | ||
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| machine. |
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The upper thread is | The bobbin thread is incorrectly | Correctly install the bobbin thread. | page 27 | |
too tight. | installed. | |||
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| The upper thread was not | Correctly thread the upper thread and | page 22, | |
| threaded correctly, or the bobbin | |||
| correctly install the bobbin thread. | page 31 | ||
| is incorrectly installed. | |||
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| The spool is incorrectly installed. | Correctly install the spool. | page 31 | |
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| The combination of fabric, thread | Select a thread and needle that are |
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| appropriate for the type of fabric | page 39 | ||
The fabric is | and needle is not correct. | |||
being sewn. |
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wrinkled. |
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| The needle is bent or blunt. | Replace the needle. | page 41 | |
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| If thin fabrics are being sewn, the | Shorten the stitch length or sew with | page 62, | |
| stitch is too coarse. | stabilizer material under the fabric. | page 70 | |
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| The thread tension is incorrect. | Adjust the tension of the upper | page 62 | |
| thread. | |||
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| The upper thread was not | Correct the upper threading. | page 32 | |
| threaded correctly. | |||
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Stitches are |
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The combination of fabric, thread | Select a thread and needle that are |
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skipped. | appropriate for the type of fabric | page 39 | ||
and needle is not correct. | ||||
| being sewn. |
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| The needle is bent or blunt. | Replace the needle. | page 41 | |
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