Leno & Mesh

Leno Weave Crossing End Tension Calculator

Crossing ends do not break because the yarn is weak. They break because the doup beam is being asked to supply a longer path than it is letting off.

Leno Geometry Crossing
mm

Sideways travel of the doup end past its partner.

mm
%

Share of the extra path the doup beam actually supplies.

Yarn Crossing end
cN
cN per % strain
cN

Crossing End Tension

— cN

Standard warp tension plus the let-off shortfall

Path & Load

Extra Path Length
— %
Extra Let-off Required
— mm/m
Strain from Shortfall
— %
Added Tension
— cN
Share of Breaking Load
— %

Keep the share of breaking load well under the level where fatigue sets in: the crossing end sees this peak on every pick, not once. Treat a rising figure as a let-off problem before touching yarn quality.

Leno Weave Crossing End Tension Calculator — free, with the formula and a worked example, at Textile School.