Warp Stop Motion Technology for Patterned Weaving
topic
Warp stop motion systems for Jacquard looms use individual drop wires on every end that fall when their warp end breaks, completing an electrical circuit that stops the loom, with drop wire design for Jacquard looms being challenging from the large number of ends and the shed geometry complexity that requires drop wires to function correctly across the full range of shed positions from fully raised to fully lowered without false triggering from shed motion rather than actual breaks.
Role
Prevents the fabric defects from missing warp ends that broken ends cause by stopping the loom immediately on break detection before the broken end can float across multiple picks creating a visible disturbance in the figured pattern, with warp stop reliability being critical in figured Jacquard weaving where missing end defects in complex patterns are both visually prominent and difficult to repair, making reliable stop motion one of the most important quality-protection systems on Jacquard looms.