Design Of The Control System For Ring Spinning Frame With Coupling Drafting Device

Fancy yarns, as a special branch of yarns, play an important role in technology innovation and during the new garment development process in textile industry based on its novel structure, colorful appearance and changing effects, especially in the aspects of fabrics and fashion design, which cannot be replaced by other yarns. In addition, according to the statistics, fancy yarns show great potential in fast reaction market of multi-variety and small batch. In the entire international textile market, the development and application of fancy yarn also presents a broad space for development. This paper mainly focuses on the research on the multicomponent spinning technology for fancy yarns. And the main work finished is as follows:(1) Based on the coupling drafting equipment for spinning frame, a color-mixing theoretical model of three primary colors which are yellow, red, and blue for three back rollers which are fed separately with rough yarns of three colors(cyan, magenta and yellow) in accordance with adjustable proportion is proposed. combining the yarn feeding proportion, the computing method for the relevant RGB value under the conversion of RGB space model is obtained.(2)In accordance with the drafting equipment for coupling draft spinning frame and other required drive devices for spinning frame, set up the control system of ring coupling draft spinning frame by adopting the control mode of PLC combination touch-screen and the servo drive technology of independent drive and cooperative control by several servo motors and variable frequency drive technology. The system is composed by two parts, namely control hardware.(3) Based on MyEclipse development platform, the software for the design of knitted pattern of rainbow yarn is developed by using Java language, which includes four models, namely, document operation, forward derivation, backward derivation and help. For forward derivation, the fabric patterns of yarns knitted by weft knitting flat machine is induced based on the distribution length of yarn segment color, fabric width, girth and other parameters; for backward derivation, the fabric patterns is designed by simulation software and then length distribution of yarn segment color is analyzed and calculated.(4) According to the relationship between various parameters derived experiment,three groups of 10 parts prepared segments of different colors of yarn procedures are programmed,which can calculate from the touch-screen input parameter to the linear velocity of each operation of the roller shaft, the angular velocity,etc.,enabling converted to be sent to PLC servo drive pulse data in order to achieve multi-component coupled spinning process.