CNC engraving and milling machine is a kind of numerical control machine tool. The following is the description of it. Definition and properties: The CNC engraving and milling machine is a numerical control milling machine that uses small cutting tools, high-power and high-speed spindle motors. It can perform engraving and milling processing at the same time and is a highly efficient and high-precision numerical control machine tool. Structural features: Mechanical structure: Generally, a gantry structure is adopted, mostly of the fixed beam type. Compared with the cantilever structure of a machining center, the gantry structure has better symmetry and rigidity, which is conducive to ensuring processing accuracy. Moving parts: The distance between the guide rails is widened to overcome the problem of adverse moments. Under the premise of ensuring certain rigidity, the moving part is as lightweight as possible to achieve rapid movement and feeding and improve processing efficiency. Spindle: Usually, an electric spindle is adopted, that is, the motor and spindle are integrated. The spindle speed is high. The common speed is 24,000 r/min. The minimum speed of high-speed machines is 30,000 r/min. The rotation accuracy is generally about 2 μm, which can meet the high-speed cutting requirements of small cutting tools and can directly process materials with a hardness of more than HRC60. Performance features: High precision: Adopting high-precision transmission components such as ball screw nut pairs and linear guides, as well as advanced numerical control systems and precise position detection devices, the positioning accuracy and repeat positioning accuracy are high. Generally, the positioning accuracy can reach 0.01 mm, and the repeat positioning accuracy can reach 0.005 mm. High speed: The moving speed and feeding speed are fast. The moving speed of high-speed machines equipped with linear motors can reach up to 120 m/min, which can effectively shorten the processing time and improve production efficiency. High flexibility: The movement trajectory and processing parameters of the cutting tool can be precisely controlled by writing numerical control programs. It can process parts of various complex shapes and is suitable for single-piece and small-batch production and rapid prototyping of products. Application fields: Mold industry: It can be used to process various molds, such as shoe molds, aluminum molds, die-casting molds, etc. It can complete the precision processing of parts such as mold cavities, cores, and sliders. It is also suitable for processing materials such as copper, iron, and aluminum. Differences from other similar machine tools: Compared with machining centers, CNC engraving and milling machines are smaller in size, have higher spindle speeds, and relatively lower power. They are suitable for finishing small milling amounts and small molds. Generally, they do not have a tool magazine or have a tool magazine with fewer tools. Compared with engraving machines, CNC engraving and milling machines have increased the spindle, servo motor power, and machine bed bearing capacity. They have higher precision and stronger cutting ability and can process materials with higher hardness.