One of the big features of a moving actuator is that it uses lubricating oil to lubricate it, but the viscosity of the lubricating oil varies with the temperature of the oil. Viscosity is too low will lead to gears and worm gear and other transmission components wear increased, the serious decline in precision transmission; and viscosity can lead to poor action. However, in reality, it is very difficult to maintain the cleanliness of the lubricating oil. The wear of the worm gear and gear components, the infiltration of moisture and impurities from the aging, etc., the corrosion and the shedding of the internal layers seriously affect the cleanliness of the lubricating oil. Therefore, we usually have to regularly check the cleanliness of lubricants and found that abnormal replacement of lubricants in a timely manner.