Development Of The Control System Of The Automatic Spreading Machine

Fabric drawing and cutting are important procedures in garment processing and production,The drawing process is to pull out the rolled raw material according to the design length and flatten it on the cutting board.The drawing efficiency,drawing accuracy and drawing flatness will directly affect the quality of subsequent cutting processes.Existing garment factories generally use automatic cloth drawing machines to complete the cloth drawing process.However,the existing mainstream cloth drawing machines are counterfeit from abroad.There are disadvantages such as low control accuracy,unfriendly interactive interface,and high price.At the same time,with the continuous increase of the existing fabric varieties,the control requirements on the drawing machine are also getting higher and higher,Especially stretch fabrics and smooth fabrics.Because the surface smoothness and elasticity of different fabrics are quite different,The control system is flawed in many drawing operations,For example,it is difficult to accurately synchronize the feed and the main stroke,the positioning cannot be accurately stopped,and the load and inertia change.Existing control systems are difficult to solve these problems.Nowadays,with the continuous development of control technology and the increasingly mature and popular motor control technology,The optimization and upgrade of the drawing machine control system has also become an inevitable trend.Since most domestic spreading equipment does not have independent intellectual property rights,China’s cloth machine manufacturing industry has been in a passive situation for a long time.Therefore,researching and developing the cloth spreader system with independent intellectual property rights is of great significance to China’s garment manufacturing industry and even related automatic control fields.This paper first analyzes the mechanical structure and process control flow of the cloth driving machine,and determines the control scheme of each part of the control system;Designed control methods,Draw the overall control circuit diagram of the drawing machine;Designed the part of the drawing machine software,Designed the part of the drawing machine software.Completed the control flow analysis of each main control system of the cloth drawing machine,Flow chart design and PLC program editing,At the same time,the design of the human-computer interaction interface and the communication with the lower computer were realized.The designed man-machine interface is friendly,intuitive and easy to operate.The motion control of the drawing machine adopts a motion control system composed of PLC and high-performance controller.Cooperate with ordinary I / O control to complete the drive of the motor.The motion control not only meets the requirements of position control accuracy,but also designs and processes the coordination of the speeds of the linkage mechanisms.Ensure the smooth operation of the entire system.After testing,the control system of the designed cloth spreader has achieved the expected results,The spreading position error is controlled within 3mm,and the overall function of the spreading machine is relatively complete.The dissertation has completed the development of a new type of fully automatic cloth driving machine control system.It realizes the full automation of the drawing process,and the control system of the new automatic drawing machine has good human-computer interaction function.Compared with similar systems,this system has the characteristics of high control accuracy and convenient operation.Having high market competitiveness,it provides theoretical basis and effective reference for the subsequent development of intelligent cloth driving machine control system.