Weft Tension and Insertion Angle Management
topic
Water-jet weft tension management controls the yarn tension from supply package through the nozzle to the receiving selvedge, with jet insertion angle relative to the shed axis and water flow rate governing the lateral force applied to the weft during transport that determines weft straightness and the tension at which the weft arrives at the far selvedge for beating and winding into the fabric structure.
Role
Prevents weft loop formation, short pick insertion, and uneven weft distribution across the fabric width from insufficient transport tension by optimising the hydraulic transport conditions for each weft yarn type, with insertion angle and water flow rate management being primary variables for achieving the straight, uniform weft insertion needed for consistent fabric pick density and appearance.
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