When you change the new grinding wheel, the grinding wheel should be carefully checked before loading. If the quality and hardness of the grinding wheel, the particle size and appearance have cracks or damage to the defects, when changing the sandwrace, when the sand is tightened, use professionalThe wrench can not be screwed too tightly, and after the anti-stroke strip is broken, after the new grinding wheel is changed, it is necessary to turn for three minutes when booting, ensuring that the grinding wheel can be applied, and when the grinder is rotated, the grinder is rotated.Staff must stand on the left side of the machine to prevent safety.