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2.6 Finishing the bead
As the coating on the outside of the electrode burns off, it forms an envelope of protective gasses
around the weld. This prevents air from reaching the molten metal and creating an undesirable chemical
reaction. However, coating burning forms slag. The slag formation appears as an accumulation of dirty
metal scale on the finished weld. Slag should be removed by striking the weld with a chipping hammer.
3.
The LIFT TIG welding method
3.1 Accessory
Switch off the welder. Remove mains plug from the wall socket.
Connect the ground cable to the positive dinse socket and screw it tight. Connecct the end of the ground
cable (earth clamp) to the workpiece. Connect the torch cable to the negative dinse socket and screw
it in clockwise direction. Tighten the torch gas hose adaptor which connects the shielding gas cylinder.
Insert the mains plug into the mains socket.
3.2 The torch pilot arc
Warning! Turn on the welder. Welding torch's tungsten electrode is already charged. The tungsten
electrode should not touch anything. This series TIG welding machine needs contact striking to produce
the arc.
How to strike the arc method is explained in the following steps:
A. Open the built-in TIG torch gas valve. Place the gas nozzle so that the tungsten electrode and the
workpiece are separated 2~3 mm.
B. Slowly lift the welding torch to cause the tungsten electrode to get into contact with a workpiece.
Summary of Contents for MIG 180-5
Page 20: ...22 C Lift the welding torch to the normal position to initiate the arc and start welding ...
Page 22: ...24 Spare parts listing ...
Page 49: ...51 Κατάλογος ανταλλακτικών ...
Page 74: ...76 Sklopni crtež rezervnih delova ...
Page 99: ...101 Sklopni crtež rezervnih delova ...
Page 127: ...129 Skica notranjosti naprave ...