The Research And Implementation Of 3D Printing Control System

With the rapid growth of the economy and the increasing degree of competition,the emergence of 3D printing makes up for the shortcomings of high cost and low efficiency of traditional manufacturing.It has been widely used in mechanical,construction and entertainment fields.At present,imported 3D printers is high cost,printing small size and low accuracy,so the domestic research and development of relevant equipment has broad prospects.Based on the FDM technology and the three-axis parallel robot,this paper researchs and implements a 3D printing control system based on PC host and motion controller MAC1630.It has the advantages of convenient operation and high printing accuracy.Firstly,the system requirements are analyzed,the overall design schematic of the system is described,the different types of motion controllers and driving methods are introduced,and the equipment selection is made.The kinematics model of 3-dof parallel robot is solved by vector method.The singularity of the mechanism is analyzed,and the motion space is shown by MATLAB.The actual test result is consistent with the result.The electrical control principle of the 3-dof parallel robot and the electrical principle of the end-printing module are designed.The electrical schematic diagram is given,and the mechanical structure of the terminal printing module is introduced in detail.The electrical control cabinet of the system is installed according to the design principle.Secondly,the preparation of the various parts of the system PLC control program and control parameter settings,including the homing,heating control,G-code control and limit protection,etc.,with no overshoot PID parameter auto-tuning mode to accurately control the temperature,to ensure uniform heating.And then write the host computer configuration interface,to facilitate the use of basic users without programming skills.Thirdly,the basic algorithm of model establishment method,slice algorithm and scanning path is studied,and the slice software Cura is introduced,and the G code of the model is generated and analyzed.Finally,the system print job verification.First,the system origin and work plane were calibrated.The parameters of the robot rods were accurately measure to ensure the printing accuracy of the system.The absolute positioning accuracy and repeat positioning accuracy of the system are tested.Finally,the actual model is printed and the source of the printing error is analyzed.From the print results,the control system achieves the accuracy of printing.