Introductions:
Don't change the turning directions too frequently, otherwise, it will damage the grinding head.Turn the SPEED CONTROL counterclockwise to decelerate the grinding head the minimum before turning off and switch the main power source to 0.After operation, put the grinding head on the top of the main panel.While the grinding head is in operation, never pull out the 5-pin plug of the portable grinding head.For long idle time. please disconnect the source power. Any unauthorized disassembling of the product is prohibited.