Kemppi Master S 400 Operating Instructions Manual

Also see for Master S 400: Service manual Quick guide

Contents

EN3.4 TIG weldingNOTE! In TIG welding the welding cable must be connected to the negative (-) pole connectionsocket and the earth return cable to the positive (+) pole connection socket.Select your required welding parameters according to the manufacturer’s filler materialrecommendations and the joint to be welded.1. Select the required polarity of welding current cable (-) and earth return cable (+) for TIGwelding.2. Select TIG welding mode by pressing the process selection button on the control panel.3. Select a suitable welding current by adjusting the current adjustment knob.4. Make a small test weld to check the selections made.Shielding gas is used in DC TIG welding. Your dealer will give you advice on choosing gas andequipment.You can start welding after having made the necessary selections. Open the gas valve on theTTM 15 V BC. When gas starts to flow, arc is lit by lightly scratching work piece with the tip ofthe tungsten electrode, or with the touch and lift method (see 'Ignition by Lift TIG'). When arcis lit, its length is regulated by holding the tip of the tungsten electrode at a suitable distancefrom the work piece. Suitable arc length is usually about half the diameter of the electrodecore wire. Move the torch forwards from the starting point. If necessary, adjust current value.The filler material, tungsten electrode and the welding current level are decided according tothe base material type and thickness, joint form and welding position.Stop welding by lifting the torch off the welding piece and by closing the gas valve on thetorch.NOTE! The torch voltage will remain on.NOTE! Always fix the gas cylinder so that it stays steadily in upright position either in speciallymade wall rack or cylinder trolley. Always close the cylinder valve after having finished welding.Ignition by Lift TIGYou can ignite TIG arc with the Lift TIG method. Gently touch the work piece with theelectrode and quickly lift the electrode from the work piece to a suitable welding distance toignite the arc. If electrode contact with the work piece exceeds 1 second, the power sourceignition will automatically shut off preventing damage to the electrode.To stop welding, quickly pull the electrode away from the work piece.< 1.0 sOrder information for the additional equipment (TIG torch) required for TIG welding can befound in 'Ordering codes' section later in this manual.11© Kemppi Oy / 1418