PR655
FAQs & Troubleshooting |
Why does the upper thread keep breaking?
There could be several reasons why the upper thread keeps breaking.
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- The upper thread could be installed incorrectly. Rethread the machine according to the instructions in the manual.
- The upper thread tension could be set too tight. Set the tension to the best thread tension setting or less.
- Make sure the spool of thread is installed correctly using the correct size spool cap for the size of spool.
- Make sure the needle is correctly inserted with the flat side facing the back and pushed up into the machine as far as possible.
- The needle could have been damaged or bent. If so replace with a new one.
- The lower thread tension is incorrect, the thread does not roll out of the bobbin case smoothly. Adjust the lower thread tension.
- The bobbin thread is not wound correctly, check that the bobbin is wound so that it is about 80% full and check the thread is evenly wound. If the bobbin is not correctly wound, rewind the bobbin.
- The thread density of the embroidery data is too fine, three or more overlapping stitches are being sewn. Using a data design system, correct the thread density and overstitching settings in the embroidery data.
- The embroidery data contains stitches with a pitch of zero. Delete all stitches with a zero pitch.
- The embroidery data contains many stitches with an extremely small pitch. Delete all stitches with a small pitch.
- The fabric is not taut. Firmly set the fabric in the embroidery frame so that it is taut.
- The thread is loose in the hook area or the hook does not rotate smoothly. Remove the loose thread.
- The thread quality is poor. The thread quality is too weak due to the age of the thread. Replace the thread.
- There are knots or tangles in the thread. Remove any knots or tangles.
- A bobbin designed specifically for this machine is not used. Be sure to use the correct bobbin
- Needle and thread are incorrect. Be sure to use the correct thread and embroidery needle.
- In the cases shown below, consult nearest authorized Dealer or Service Center.
- The area around the hole in the needle plate is damaged.
- The needle hits/touches the needle plate.
- The presser foot is set too high and not correctly positioned. The needle hits/touches the presser foot.
- The area around the embroidery foot hole is damaged.
- Sliding surface on hook race is not smooth. There are scratches or burrs on it.
- The play between the hook and the race is too much.
- The space between the hook stopper and the hook cannot be adjusted.
- The automatic needle-threading mechanism is broken.
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