Research and Design of Four-Axis CNC System Based on Differential Interpolation Principle

Abstract

With the development of science and technology, economical CNC machine tools have also developed rapidly. Due to the advantages of low price and open source, it is widely used by small and medium-sized enterprises. However, there are shortcomings of insufficient interpolation when processing high precision workpieces. Therefore, this paper develops a four-axis CNC system based on the principle of differential interpolation, according to the characteristics of PC and Arduino MCU, determines the upper and lower machine control scheme of “PC + Arduino MCU” and builds a four-axis CNC engraving machine experimental platform. On this platform, interpolation of conic curve and rotary surface is completed. Experiments show that the four-axis CNC system designed in this paper meets the initial design requirements and lays a good foundation for the development of high-end multi-axis CNC systems.