Weft Feeder and Threading Device Operation
topic
The projectile threading device presents the weft yarn end to the projectile gripper jaw precisely positioned for reliable gripping before each pick, with the weft feeder unwinding a defined length of weft from the supply package accumulator and positioning the yarn end at the gripper jaw presentation point, with threading device timing synchronised to picking mechanism to ensure complete yarn presentation before projectile acceleration begins.
Role
Enables reliable weft gripping at the projectile jaw that is prerequisite for successful weft insertion, with threading device timing precision and weft end positioning accuracy determining the proportion of picks achieving secure gripper clamping that allows complete insertion without weft slippage or drop from the gripper during the acceleration and transport phases of projectile flight.
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