Harness Construction and Cord Configuration
topic
Jacquard harnesses connect the machine hooks to warp ends through a system of harness cords passing through comber boards that position the cords at the warp sett spacing, with each harness cord connected to a mail or heddle through which one warp end passes, and with the harness neck configuration specifying which machine hook each harness cord connects to, determining the design repeat assignment where straight harness neck assigns consecutive hooks to consecutive warp positions for unrepeated designs or grouped necks repeat the design across the fabric width.
Role
Translates the abstract hook control of the Jacquard machine into physical warp end control through the mechanical intermediary of harness cords and mails, with harness configuration determining both the design repeat geometry and the physical forces transmitted through the harness system, with harness cord tension balance being critical for even shed formation across the warp width that ensures uniform fabric structure and prevents the elevated warp break rates that result from uneven harness tension distribution.