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What is "Looms Major Motions" - Definition & Explanation

These are shedding, picking, and beating-up. Minor motions on looms are the take-up, let-off, and pattern. The first three motions are linked together as follows:

a. Shedding Motion: The separating of the warp ends into an upper and lower system of threads to permit the shuttle to pass through the space that has been formed. The warp ends are drawn through heddle eyes in the correct manner, and in the turning-over of the crank shaft of the loom, a shed is formed with each turn.

b. Picking Motion: The actual passing of the shuttle through the shed of the loom. The shuttle passes over the lowered ends of the shed and under its raised ends. The shed permits the shuttle to pass through it and thereby makes it possible for the shuttle to deposit the pick or filling yarn.

c. Beating-Up: The actual beating into place of the loose pick that was placed In the shed of the loom in the picking motion. Beating-up makes each and every deposited yarn a component part of the woven cloth, The reed beats this pick into place with each consecutive turn of the crankshaft.

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