Stone cutting machine is a compulsory certification product stipulated by the State/National Accreditation Regulatory Commission. Therefore, when choosing and purchasing the product, we should first check whether it has 3C mark or not. Generally, the method of checking is whether there is 3C mark on the outer package of the tool or the nameplate of the tool. If there are still doubts about this, the State/National Accreditation Regulatory Commission will suspend or cancel it because the manufacturer of the electric tool has not passed the annual supervisory review. Certificate) can be accessed to the website of the China National Accreditation Regulatory Commission to check whether the 3C certificate of the tool is currently valid.

According to the needs of users, first distinguish between family use and professional use, because most of the electric tools are designed for professionals, so before choosing and purchasing, we should first distinguish between professional and general family shellfish. Usually, the power of professional tools is different from that of general household tools. The power of professional tools is larger to facilitate professionals to reduce their workload. The input power of general household tools is not very large because of the small engineering and relatively small workload.

To observe the outer packing of stone cutting machine, the outer packing should have clear pattern and no damage. To open the packing box and observe the appearance of stone cutting machine, the color should be uniform. There should be no obvious shadow and dent on the surface of plastic parts, no scratch or bump marks, assembly dislocation between shell parts should be less than 0.5mm, the coating of aluminium castings should be smooth and beautiful, and there should be no oil stain and stain on the surface of the whole machine. When holding by hand, the self-feeling is better, and the handle of the switch should be flat. The length of the cable should generally be no less than 2 meters.

Check the nameplate and instructions of the stone cutting machine. The nameplate parameters should be consistent with those on the 3C certificate. Detailed address and contact information of manufacturer and manufacturer should be provided in the instruction. There should be a traceable batch number on the nameplate or certificate. Hold the stone cutting machine by hand, turn on the power supply, and operate the switch frequently by hand, so that the tool starts frequently. Observe whether the on-off function of the switch of the stone cutting machine is reliable. At the same time, observe whether there are abnormal phenomena in the TV and fluorescent lamp on the spot. In order to confirm whether the tool is equipped with an effective radio interference suppressor. Stone cutting machine is electrified for one minute. When it is running, it should be held by hand. There should be no abnormal vibration in the hand. Observe the commutation spark. The commutation spark should not exceed 1.5 grade. Generally, there should be no obvious arc on the surface of the commutator from the air inlet of the tool. When running, there should be no abnormal noise and so on.