Method of controlling pile warp tension in synchronism with loom movement
AssigneeTsudakoma Corp.
InventorsKatsuhiko Sugita, Akihiko Nakada, Tsutomu Sainen
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Abstract
A warp tension control method by which the let-off motion of a loom is controlled to regulate the tension of the warp yarns. A force of the same dimension as the controlled variable, namely, the tension of the warp yarns, is applied to a mechanism supporting the tension roller of the let-off motion for displacement under the control of an electric control system to control the warp tension at a high accuracy.
Claims8
A warp tension control method for controlling a let-off motion for a loom which has rotatable crankshaft and has a displaceable tension roller over which warp yarns from a rotatable warp beam are extended, comprising the steps of applying a force to the tension roller in a direction of displacement of the tension roller so that the tension of the warp yarns is maintained substantially on a fixed level, rotating the warp beam in a let-off direction at a speed varied in dependence on the amount of displacement of the tension roller, and applying to the tension roller a force which is varied in a predetermined manner in synchronism with the rotation of the crankshaft of the loom to regulate the position of the tension roller so that the tension of the warp yarn is adjusted substantially to a target value.
Dependencies are inferred from the claim text.