< span style = "font size: 16px;" > there are many reasons for the lack of force of the pneumatic engraving mill. Generally, eliminate external factors, such as air pressure and air flow, and then see whether it is caused by the problems of the machine itself. Common external causes are as follows: 1. The air pressure is insufficient, and the air pressure delivered by the air pump is not enough to make the engraving mill work normally. When the engraving mill is used, the working pressure is about 6.3kg-cm, and the pressure drop shall not exceed 0.5kg-cm; 2. The air flow is insufficient, the wiring is unreasonable, the air pipe is too small, and the engraving mill is too far away from the air pump, resulting in the reduction of the transmitted air pressure when reaching the engraving mill, and the air flow can not keep up with the air consumption of the machine during use, resulting in lack of power; resolvent: Install an air storage tank in the workshop, replace the large main air line pipe and arrange it into a return line to facilitate the rapid return and pressure return of compressed air. It is recommended to install triplet parts (pressure stabilization, automatic water filtering and automatic refueling) for branch gas pipes to limit the maximum pressure of 7kg cm. Pay attention to drain the triplet parts at intervals, and pay attention to filling the pneumatic oil in the oil tank, which shall not be less than 1 / 3. Pneumatic engraving mill, a minimum of 10 is recommended × 6.5mm air pipe. This is the reason why the external working environment may reduce the strength of the engraving mill and the solution. After the external factors are eliminated, the pneumatic engraving mill needs to be inspected. The common internal causes are as follows: Check the air regulating valve of the machine to see if it is fully open; Whether pneumatic oil is often added for maintenance at ordinary times. If it is not added, it should be that the internal consumables are lost and need to be disassembled and replaced; Analysis: if the pneumatic engraving mill is not maintained with pneumatic oil for a long time, the rotating speed of the machine is as high as 20000-30000 RPM during operation. The absence of pneumatic oil will cause serious heating and rapid wear of the motor components of the machine; In addition, the compressed air contains water, and there is no pneumatic oil for lubrication and maintenance, which will cause the motor parts of the engraving mill to rust; During the use of the machine, the dust will enter the inside of the pneumatic engraving mill. If the pneumatic oil is not added, the dust particles cannot be discharged in time. After a period of time, it will accumulate more and more, which will cause faults such as internal blockage of the motor and fan blade burst. The maintenance is proper at ordinary times. It takes a long time, but suddenly it's powerless. The above situations can be eliminated. That proves that the machine consumables have reached their service life and need to be replaced.