Kemppi HiArc T 180 Manual

9© Kemppi Oy / 1410EN92.4 Welding power selection and electrodesTIG welding electrodes and gas nozzlesIn DC TIG welding we recommend the use of the WC20 (grey) type electrode,however other types are available.The welding electrode size (diameter) is selected depending on the weldingcurrent/power to be used. An electrode with an insufficient diametercompared to the welding current will melt, while excessive electrode sizewill make it more difficult to ignite the arc.In general, a 1.6 mm tungsten electrode will cover currents up to 150 A.Before use, grind the tungsten electrode to a sharp point at approximately1.5 times the diameter of the electrode. If the electrode touches the workpiece during welding, re-sharpen the electrode.MMA welding electrodesIn MMA welding, the welding electrodes must be connected to the correctpole. Normally, the electrode holder is connected to the positive and theearth return cable to the negative connector.It is also important to properly adjust the welding current so that the fillermaterial and coating will melt properly and the welding is efficient. The tablebelow presents the electrode sizes available with the HiArc T 180 weldingmachine and the corresponding welding current values.MMA Electrodes and corresponding current settings rangeElectrodediameter1.6 mm 2.0 mm 2.5 mm 3.25 mmFe-Rutile 30-60 A 40-80 A 50-110 A 80-140 AFe-Basic 30-55 A 50-80 A 80-110 A 110-140 A