Kemppi HiArc T 180 Manual

10 Hiarc T 180EN103. USENOTE! It is forbidden to weld in places where there is a danger of fire orexplosion!3.1 Welding processesHiArc T 180 is a precise welding tool and will provide high quality resultstime after time provided the correct operational procedures are followed.Welding quality is not only influenced by the machine itself. Personalexpertise, ancillary equipment and consumables also play an essential role,as does the correct, fused supply power.Welding is carried out when an electric arc is established between thewelding electrode and work piece. Welding is not possible unless theequipment is correctly set-up, including the earth return cable attached tothe work piece. This cable creates the welding circuit that allows the weldingcurrent to flow. Please check that the earthing clamp is on the work pieceand that the contact area of the clamp is clean and free from paint and rust.3.1.1 Manual Metal Arc welding (MMA)In manual metal arc welding (MMA) the welding filler material is meltedfrom the electrode to the weld pool. The rate of the welding current isselected based on the electrode size used and the welding position. Arcforms between electrode tip and welding piece. The melting electrodecoating forms gas and slag, which protects the weld pool. Slag solidifiedover the weld is removed after welding e.g. with a chipping hammer (use ofeye protection is strongly advised).3.1.2 TIG weldingIn DC TIG welding, the arc between the tungsten electrode and the weldingpiece melts the welding piece, thus forming a weld pool. Arc and electrodeare shielded by an inert shielding gas (argon). If necessary, filler is used. Fillerwire is fed into the weld pool from the outside of the arc. The filler wire andthe welding current level are decided according to the base material typeand thickness, joint form and welding position.(Gas regulator, flow meter and pure argon shielding gas are not provided inthis package.)