1. Check the nameplate and instruction manual of the stone cutting machine, and the nameplate parameters should be consistent with those on the 3C certificate.
2. Observe the outer packaging of the stone cutting machine. The outer packaging should have clear patterns and no damage.
Open the packaging box and observe the appearance of the stone cutting machine. The color should be uniform. There should be no obvious shadows and dents on the surface of the plastic parts, and there should be no scratches or bump marks. The coating of the aluminum castings is smooth and beautiful without defects.
3. Hold the stone cutting machine with your hand, turn on the power, and frequently operate the switch by hand to make the tool start frequently, and observe whether the on-off function of the switch of the stone cutting machine is reliable.
4. During the trial operation of cutting discs, observe whether there are abnormalities in the TV and fluorescent lamps on site at the same time, so as to confirm whether the tools are equipped with radio interference suppressors.
5. Observe the reversing sparks during the trial operation. The reversing sparks should not exceed 3/2 level. Generally, if you look in from the air inlet of the tool, there should be no obvious arc on the surface of the commutator, and there should be no abnormal noise during operation.
