Research On Precision Control Of 3D Printer Based On Fuzzy PID

The 3D printing technology is accepted by more and more people, and this will digital model files quickly transformed into metal, plastic, or biological material technology has been more and more optimistic about, has a very broad prospect. More and more fans began to come into contact with the hands-on understanding of desktop 3D printer, this type of 3D printer has the advantages of low cost, small occupied space, cheap printing supplies etc.. But such a 3D printer to print accuracy is generally not up to the printing precision industrial grade 3D printers.This paper first introduces the research background and significance, and analyzes the development status at home and abroad. The comprehensive analysis of the factors affecting the forming precision of desktop 3D printer, mainly to the print head temperature control are studied.Through the performance analysis of 3D printer system, select appropriate components with zero. Such as motor, drive and control chip. In the case of the approximate component has been determined, the heating structure of the 3D printer is introduced, and the influence of the temperature factor on the printing precision is analyzed. The effect of the nozzle on the extrusion wire is directly affected by the temperature. Temperature is too high will cause the outflow of the print head of the material with too much excess temperature, affect its cooling. But also through the heat conduction to affect the cooling and solidification of the part before. Temperature is too low will affect the circulation of the print wire, resulting in intermittent wire, the model is not accurate enough to direct the degree of precision. So the temperature has a great influence on the printer’s precision. And printer of the heating system temperature change rate is high, fast temperature rise, through the introduction of the advantages and disadvantages of the PID control and fuzzy control proposed by combining two kinds of controller to form a fuzzy PID controller to achieve the temperature control precision and quick response. Through the establishment of fuzzy control rules, fuzzy and defuzzification methods have defuzziness to realize fuzzy PID control effect.In addition to the control method, and introduces the hardware components of the 3D printer. Including control board, motor and shell framework. This paper introduces each of the main control board module, the components and the realization of the function and principle are analyzed in detail. Including the display driver output, output power and USB module. The above modules can be easily connected to the computer through the USB, through the PC software and slicing software with each other to complete online print function model. At the same time, display module can provide the TF card slot, the slicing software to form the G code is stored in the memory card to achieve print offline.