1. First, ensure that the power switch of the welder is turned off, and pull the power plug out of the socket to ensure safety.

2. Check whether the power cord and welding torch wire of electric welding machine are in good condition, and whether there is any damage and wear.

3. Insert the power cord plug of the welder into the power socket, and ensure that the plug and socket are firmly connected.

4. Insert the welding torch wire plug into the welding torch socket on the welding machine to ensure that the plug and socket are firmly connected.

5. Check whether the welding torch cable is intact, damaged or worn.

6. Connect the welding torch cable to the welding torch to ensure firm connection.

7. Check whether the electrode head of the welding torch is clean and free of oxidation or dirt.

8. The electrode head of the welding torch is in contact with the workpiece to ensure good contact.

9. Check whether the grounding wire of the welding torch is in good condition, with and without damage and wear.

10. Connect the grounding wire of the welding torch to the workpiece to ensure firm connection.

1 1. Check whether the current adjusting knob of the welding torch is adjusted to the appropriate welding current.

12. Turn on the power switch of the welding machine and start the welding operation.

It should be noted that before welding, it is necessary to ensure that all wires are firmly connected, and the electrode head and grounding wire of the welding gun are in good contact with the workpiece. In addition, the current should be adjusted according to the specific welding requirements to ensure the welding quality and safety.