The engraving machine will generate a certain amount of heat after a certain period of operation. If it is not cooled in time, it will easily damage the working life of the main shaft of the engraving machine and affect the quality of the engraving products. So at present, many engraving machine spindle manufacturers are using water chillers to cool the engraving machine spindle. The working condition of the water chillers at 20℃-30℃ is the best, which can make the engraving machine spindle achieve the best cooling effect.