Stitch Length Test Methods and Acceptable Limits
Stitch Length is verified through machine cam setting. Knowing how the method works avoids rejecting fabric that actually meets the requirement.
Method overview
machine cam setting defines sample size, conditioning and calculation, so values are comparable only within the same revision. Working figures for Stitch Length normally sit around 2.6-3.4 mm typical stretch knit in mainstream production. Note machine cam setting on the tech pack so nobody tests against an older revision.
Result interpretation
Read the value together with construction notes; 2.6-3.4 mm typical stretch knit is only meaningful for similar fabrics. Record elastane content alongside Stitch Length, because blends shift the measured value. A result outside 2.6-3.4 mm typical stretch knit usually points to process drift rather than to the fibre itself.
Typical limits
Buyers commonly write 2.6-3.4 mm typical stretch knit with a stated tolerance, then verify against machine cam setting. Keeping reference values for Stitch Length lets suppliers quote without extra sampling rounds. Ask for conditioning details together with machine cam setting, since both affect the reading.
Sources of variation
Conditioning time, operator technique and shade all influence the result. Working figures for Stitch Length normally sit around 2.6-3.4 mm typical stretch knit in mainstream production. Note machine cam setting on the tech pack so nobody tests against an older revision.
Documentation
Record the standard revision on every report, because older versions can differ from current practice. Record elastane content alongside Stitch Length, because blends shift the measured value. A result outside 2.6-3.4 mm typical stretch knit usually points to process drift rather than to the fibre itself.
