... firstly.1.2 The weldment needs to cleanliness, no oxidization, without greasy dirt etc.1.3 Connect the power supply, turn on ... .2 The piece of welder needs to cleanliness, no oxidization, without greasy dirt etc.3.3 Connect the power supply, turn on ... supplies, guarantee that the machines cover connect to the earths, to insure the safety.2. Put the machine to the dependable place.3. Use ...