Shed Geometry Interaction with Warp Preparation Quality
topic
Warp preparation quality and shed geometry interact through the effect of sizing add-on on yarn stiffness that modifies the effective warp extension at a given shed height, with heavily sized yarns requiring smaller shed heights to achieve equivalent warp tension to unsized yarn, while inadequately sized yarns with low surface cohesion may need slightly larger shed heights to achieve the shed force required to spread fibres for clean shed formation, requiring shed geometry optimisation to account for the specific sizing level of each warp rather than using fixed settings across all warps.
Role
Establishes the preparation-loom parameter interaction that requires shed geometry to be considered as part of the complete warp preparation and weaving parameter system rather than independently, with sizing quality being a preparation variable that affects the optimal shed geometry setting in production, and with this interaction being one of the reasons why process optimisation for new fabric specifications requires evaluation of both preparation parameters and loom setup parameters simultaneously.