How to Use Different Types of Welding Machines

Tungsten Inert Gas (TIG) and Metal Inert Gas (MIG) are both are types of gas arc welding machines, but are somewhat different in how they are applied. TIG welding uses a filler rod and a non-consumable electrode, whereas MIG welding uses a consumable electrode that is also the filler wire.

TIG Welding

1. Hold the torch in the way that gives you maximum control of the electrode. TIG welders have a number of different ways in which they can hold their torches. Holding it like a pen is a popular method, but it all depends on individual preference. 


2. Maintain a constant distance between the electrode of the torch and the metal being welded. The distance between the electrode and the welded area should be roughly equal to that of the diameter of the electrode. 


3. Start an arc and then start a welding puddle with the electrode and dip the filler rod into it as needed, then move along the welding area holding the torch at a 60 to 80 degree angle from the welding puddle. Keep the electrode at the edge of the welding puddle.

MIG Welding

1. Set up the shielding gas flow rate. This depends on the airflow situation you will be working in. For instance, a windy situation will require a different flow rate than one with still air. 


2. Adjust the voltage setting to suit the type of metal you will be welding. MIG welding is for aluminum and stainless steel. The thickness of the metal to be welded is also a factor in the voltage used. 


3. Adjust the wire feed speed. This is the rate at which the filler wire feeds to the weld joint. This too will depend on the type of metal being welded.