The GTAW welding system
Every commercial welder will tell you that the typical welding system comprises of several elements which include supply of welding power, weld controller, welding torch, as well as tungsten electrode. Commercial welders know that during the gas tungsten arc welding process besides the welding equipment they should also use certain welding parameters. The weld program has specific welding parameters that are developed so that a certain weld quality can be reached.
When a certain parameter in that weld is changed, this leads to a change in the final quality of the weld. In general, the commercial welders write down the welding variables and store them in the memory of the welding equipment.
Sometimes in certain welding applications of great precision and purity, the welders are using specifications with recommended welding parameters that include diameter, base material, weld joint, and also type and purity of the shield gas, as well as arc length, surface condition, tungsten electrode, etc. Some of the suppliers of welding equipment offer special weld programs that gave variety of materials, diameters and thicknesses.
The commercial welders should follow the procedures that are suggested by the suppliers as in general the suppliers are performing many qualifying and troubleshooting work.
In fact the suppliers of welding equipment cannot make tests for each welding application and that is why the GTAW welding applications that come with no specifications should be done by the commercial welders who are experienced and can set a welding setup and arrange the welding parameters.
The general guidelines of the welding equipment do not apply to every welding application and parameters. As a rule, the welding parameters are changed according to the specific needs of the application, yet there are certain starting points that are chosen.