CNC machining centers are unable to process small molds with small tools, and the cost is very high. The advantage of engraving machine is engraving small workpieces with lower cost. The emergence of engraving milling machine can be said to fill the shortcomings of both. But if the hardness of processing materials is relatively high, it will be unable to do it.

CNC machining centers can realize the centralized processing of various processes such as milling, drilling, boring, reaming and tapping after the workpiece is clamped at one time. The function emphasizes "milling". CNC machining centers require ordinary speed for the CNC system, and the spindle speed is about 0 ~ 8000rpm, which is especially suitable for heavy cutting. The CNC machining centers for rough processing generally adopts cantilever type, which has a large volume.

Engraving milling machines generally use gantry structure. Gantry type is divided into moving beam type and fixed beam type. At present, engraving milling machines mostly use fixed beam type. It can do carving and milling. Based on the engraving machine, the power of the spindle and servo motor is increased, and the bearing capacity of the base is increased. At the same time, the high speed of the spindle is maintained, and more importantly, the precision is very high. Engraving milling machines are also developed for higher speed. They are generally called high-speed machines. They have stronger cutting capacity and very high machining accuracy. They can also directly process materials with hardness above HRC60. They are formed at one time and suitable for finishing. The engraving milling machine requires a high-speed CNC system, and the spindle speed is about 3000 ~ 30000 rpm.

CNC milling machining center is used to complete the processing equipment of workpieces with large milling volume. CNC engraving milling machine is used to complete small milling volume or soft metal processing equipment. High speed cutting machine is used to complete medium milling volume and minimize the grinding volume after milling.