CNC machine tools can be divided into three levels:
1) High-end CNC machine tools: refers to CNC machine tools with multi-axis control or process concentration, high degree of automation and high flexibility for processing complex shapes.
2) Universal CNC machine tool: It has the function of man-machine dialogue, is widely used, and has a moderate price. It is usually called a full-function CNC machine tool.
3) Economical CNC machine tools: simple in structure, medium in precision, but cheap in price, can only meet the processing requirements of general precision, and can process parts with simple shapes such as straight lines, oblique lines, arcs and threads.