The Development Of The Flat Screen Printing Machine Control System Based On CPLD

Our country is great on textile and printing industry, in recent years the Flat Screen Printing Machine develops rapidly for its advantages that adapting to the smallvolume, many varieties, the printing nets costing low, high precision,etc. In this context, the subject puts forward to using Microcontroller + CPLD to build the Flat Screen Printing Machine's control system. In the paper, it contains the details including the overall design of the control system, the research of high speed and high precision positioning of servo motor, hardware design, software design, etc.Chapter 1 introduces the Flat Screen Printing Machine present status and development trend and its control system present status, and the research content.Chapter 2 introduces the mechanical structure and motion flows of the Flat Screen Printing Machine with a fixed flat pallet, as well as to elaborate and analyze the the precision of printing.Chapter 3 presents the AC servo motor and its control methods, and puts forward the closed-loop position servo system error analysis and repositioning precision analysis.Chapter 4 expounds the control system's hardware circuit design, detailed introduces the CPLD chip level program design process, and finally analyzes the difficulties in the process of hardware circuit design, some solutions are given.Chapter 5 mainly introduces control system software's function,structure and its module design, and analyzes the reliability, the corresponding measures are given.Chapter 6 emulates the algorithm of S form acceleration and deceleration curve of servo motor, and through the experiments to prove the correction.Chapter 7 summarizes all of the paper, the shortage of the system were analyzed, and proposes improvement scheme.