The power of the spindle of the engraving machine is not the bigger the better, but the need to choose according to the object of engraving. Sculpting objects of different materials require spindle motors of different powers. For example, advertising engraving machine is usually used to carve softer materials, and its spindle power is generally within 1.5KW-3.0kW; The spindle motor power of woodworking engraving machine is generally about 2.2KW-4.5kW; Stone engraving machine requires a high spindle power, generally around 4.5KW-7.5kW; The metal engraving machine chooses the corresponding spindle motor power according to the different engraving and milling materials. Choosing the right spindle motor power is crucial to saving costs and improving engraving efficiency. Too much power of the spindle motor will not only waste energy but also increase the cost of the machine, and too little power can not meet the engraving power needs, so choose the right spindle motor power is very important.