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1. Before starting the machine, ensure that the power supply is safe, the protection device is safe and effective, the tool belt clip is correct, and the limit of the grinding wheel is normal. 2. After starting, it should be run without load, check and confirm that the direction of the motor knife belt is in line with the direction of the indicated arrow, and the direction of the grinding wheel is contrary to the direction of the knife back. 3. During the operation of the equipment, keep the continuous small spark sharpening. 4. The machine needs to be checked regularly, clean the dust of the knife sharpening system, and do daily maintenance. 5. If abnormal sound is found, stop the machine for inspection in time. After troubleshooting, you can continue the operation. Operation, please turn off the power before maintenance.