Before buying can electrify inspect on the front panel switch operation, conversion and installation, destroy the light of the indicator, fan is normal, the power supply section to see if there is abnormal vibration and hum, whether there is peculiar smell, whether has the fever phenomenon, such as color change on appearance in order to assure the quality of the welding machine, give full play to the performance of welding machine.
When you choose and buy, check whether the nameplate on the product has the name of the manufacturer, production address, specifications and models, welding current adjustment range, load persistence rate and input voltage and current, and then determine the welding machine you want to buy according to the work needs.
When purchasing, check whether the product has a grounding screw. The connection of the grounding screw should be well grounded without paint. Whether the movement is clean and whether the insulation is damaged, to ensure the use of safety, if necessary, can also be tested.
If you want to buy gas shielded welding machine, before buying, you should also check whether the accessories are complete, whether the wire feeder is greasy, whether the rotation is smooth, whether the connecting cable matches the appearance of insulation is damaged, to ensure the stability of the arc.
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