Motion Controller Design Of Flexographic Printing Pressure Regulating System Based On ARM

With the continuous development of manufacturing technology,green and pollution free intelligent mechanical equipment has received more and more attention.In the current printing field,the flexographic printing technology known as "green printing" has been widely used abroad and has gradually matured.However,the domestic flexographic printing technology is still in the development stage,and the high-end flexographic printing presses are still using a large amount of foreign equipment,therefore,the research of flexography technology has played an important role in realizing the localization of flexographic printing presses.One of the key technologies of the flexographic printing press is the pressure regulation of the flexographic printing system,this paper mainly studies and designs the motion controller of the flexographic printing pressure regulating system.Based on the application requirement of the actual factory project as the background,design a with HMI as human-computer interaction platform,with the ARM chip as the core of the motion controller,the FPGA chip as the core of extension interface circuit,stepper motor drives,stepper motor,grating ruler for execution feedback components of flexographic printing pressure regulating control system.Aiming at the hardware circuit of the system,the communication circuit,the motor driver pulse signal transmission circuit,the grating scale signal receiving circuit,etc.are designed,and the welding and debugging of the hardware circuit are completed..Aiming at the software program design of the system,according to the function module,the design of RS442 and CAN communication protocol,various data analysis functions and motion control function design are completed.At the same time,the human-computer interaction interface was designed by Dopsoft software to control the motion parameters of the system.In the design of controller motion control algorithm,based on the moment frequency characteristics of stepper motor,a trapezoidal acceleration and deceleration algorithm based on digital sampling interpolation algorithm is designed to ensure that the stepper motor can run normally according to the predetermined trajectory,based on this,a closed-loop control algorithm is designed to enable the stepper motor to complete closed-loop control at a specified stage to achieve precise control of the position of the stepper motor.At the same time,in the process of motion,in order to ensure the synchronization performance between the coaxial motors of the system,a cross-coupling synchronous control algorithm is designed to control the position deviation of the motors on both sides of the coaxial,so that the deviation is within a reasonable range.Finally,combined with the mathematical model of stepper motor,the motion control algorithm designed in this paper is simulated by Matlab and Simulink tool.The feasibility of the algorithm is verified by simulation curve.In the laboratory environment,using the designed hardware and software,the system test platform was built.Due to the limited resources of the laboratory,the hardware connection of the one color cell motor can only be realized,so,in order to test the communication stability of the eight color cells system,it is necessary to modify the program of receiving and sending pulse module of the remaining seven color cells ARM slave motion controller into the self closing loop and the self feedback mode,so as to realize the simulation of eight color system.After testing the function of each module of the system and analyzing the experimental results,the feasibility of the motion controller software and hardware designed in this paper is verified.