Abstract
The tension in the warp yarns is a critical variable in the weaving process. If the warp tension is too high or too low the weaving process will be interrupted. A parameter that directly affects the warp tension is the vertical warp stop motion position. The position of the warp stop motion must be set for every produced new article. The setting procedure is performed completely manual. In this paper we present a mechatronic modification of an air jet-weaving machine to adjust the vertical warp stop motion position with the help of actuators. The parameters for the automated movement are determined and an open loop control, which uses a PLC, is proposed.
Highlights
Weaving is one of the oldest manufacturing technologies known to mankind
Woven fabrics are produced on weaving machines or so-called looms [1]
One important parameter is the vertical position of the warp stop motion, which effects the tension in the warp yarns and the appearance of the fabric
Summary
Woven fabrics are described as a rectangular crossing of so-called warp and weft yarns. Woven fabrics are produced on weaving machines or so-called looms [1]. The yarns are led through the warp stop motion. The up and down motion of the shafts creates the shed, in which the so-called weft yarn is inserted rectangular to the warp yarns. The reed strikes the inserted weft yarn to the fabric edge and the position of the shafts change. One important parameter is the vertical position of the warp stop motion, which effects the tension in the warp yarns and the appearance of the fabric. In this paper an essential setting parameter of the loom, the vertical warp stop motion position, is automatized and significantly decreases the changeover time when producing a new fabric
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