COA: 77.77 GBp
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Casa • Industry FAQs • Why is the thread not being trimmed on a lockstitch machine?
  1. Is the thread too thick for the trimmers?
  2. Is the knife damaged or worn?
  3. Is the thread trimming timing correct?
  4. Is the knife blunt?
  5. Are skipped stitches causing the issue?
  6. Badly wound thread on bobbin. Adjust bobbin winder alignment. Use prewound bobbins.
  7. Tension too tight or bobbin over-running. Adjust bobbin case tension. Insert washer or spring to prevent over-running.