- Stitch is too loose.
- Check the thread tension.
- Check the sharpness of the feed dog and throat plate teeth.
- The needles keep breaking.
- Check the looper and needle alignment.
- Check the needle alignment to the throat plate and presser foot needle guide.
- The thread keeps breaking.
- Replace needle.
- Is the thread unrolling easily from the cone?
- Check the thread tension.
- Check the thread guides and make sure they are clean.
- Check timing procedures listed in item #2.
- The machine is skipping stitches or does not make a thread chain at the end of the bag.
- Check the thread tension.
- Make sure the thread guides are clean and that thread can easily pass through them.
- Is the thread unrolling from the cone easily?
- Check the teeth on the feed dog and the throat plate. Replace them if they are dull.
- Check if the needle is bent, loose, or misaligned (replace it).
- Check if the looper is loose, worn or needs to be reset.
- Make sure the machine is properly threaded.
- See our tips page for other suggestions. Approximately one-third of all machines received in our shop for service have the needle inserted incorrectly. Please see needle replacement for correct installation. A new needle in the correct direction will solve many sewing problems.
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