§ VALIDATION · AMBER

NEEDLE_THREAD_FABRIC_MISMATCH

The needle, thread, and fabric combination is likely to sew poorly together.

Thread and needle compatibilityDeterministic rule
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What it means

The needle, thread, and fabric combination is likely to sew poorly together.

Why it matters

Correct needle and thread pairing matters for clean penetration and stitch quality.

Common triggers

  • hard substrate with wrong needle size
  • delicate fabric with aggressive setup

Typical fixes

  • change needle size/type
  • change thread choice
  • test stitch

Notes

  • Operator-facing recommendation rule.

Plan references

  • plan/57-context-aware-validation-matrix.md