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Motor power 100W, 4500 RPM, 220V/50Hz (110V/60Hz) First, check whether the operation is normal after the power is powered on. If it cannot operate normally, please check whether the fuse built into the power socket is blown. If yes, please replace (10A) in time; Second, when working, the front end of the rotary file must be lower than the working platform surface 0.5~1mm to ensure effective grinding; Third, if it is necessary to replace the rotary file or adjust its working height, please turn the dust cover 90 degrees, and use two attachment wrenches to hold the upper spindle and the lower end of the locking nut outer edge, so that it is relaxed or clamped. After the work is finished, the dust cover will still be restored; Fourth, the work must be the vacuum cleaner hose into the dust outlet, and work with the vacuum cleaner. If there is too much dust in the powder cartridge after long-term work, you can remove the bottom cover plate, and then remove the powder cartridge to clean the dust in the box. Five, pay attention to the safety of operation. 1. It is strictly prohibited to touch the rotary file with your hand when the machine is turned on; 2. Do not operate with gloves.