Assigning Spinning versus Sizing Root Causes in High Speed Weaving Faults
Differentiating spinning and sizing root causes requires cross-sectional microscopy and high-speed tensile testing to map size encapsulation against yarn mass variation.
Heald Eye Wire
Guidance Component
Loom harnesses use thin steel strips with a central opening to control the vertical movement of individual warp yarns during shedding. The heald eye wire must guide each linen yarn smoothly to prevent abrasion and surface damage. Because linen yarns are stiffer and more abrasive than cotton, the shape and smoothness of this metal opening are important to prevent yarn wear.
Wear Resistance
Production of these wire components utilizes high-grade hardened steel or nickel-plated alloys. The polished surface of the heald eye wire minimizes friction as the yarn slides through it. Any roughness on the metal surface will strip the protective size coating from the flax yarn.
Fabric Integrity
Selection of the correct eye size and wire thickness depends on the yarn count and the density of the warp sheet. A wire that is too thick restricts the spacing of the warp, while an eye that is too small pinches the yarn. Loom mills use specialized wires for linen to ensure that the yarn passes through without snagging or breaking.
Correct alignment of these components across the harness frame ensures uniform tension across the entire width of the loom, which is necessary for producing high-grade plain linen fabric.