Abstract:

During the braiding process of circular knitting machine, the structure and properties of drawing and rolling-up mechanism affect fabric quality seriously. Therefore, how to keep cloth constant drawing tension is the core research of drawing and rolling-up mechanism. In order to solve the uneven fabric density problem, uneven surface and even damaging to the fabric structure in jacquard weaving caused by deviation of the mechanical and open-loop electronic formula control system in the drawing tension. a closed loop control method of drawing tension was proposed. To optimize the open-loop electronic formula drawing and rolling-up mechanism, combined with embedded technology, intelligent control technology and modern sensor technology, a drawing tension closed-loop control system of circular knitting machine was developed. The optimization design of the drawing and rolling mechanism was expounded and the hardware and software of control system was developed. Through theoretical analysis and practical test, tension closed-loop control system has a good real-time performance, rolling tension dynamic stability, meets the demands of fabric smoothness, the design is reasonable and feasible.

Key words: circular kniting machine, drawing and rolling-up mechanism, constant tension, closed-loop control