Abstract
In this work, a methodology to obtain the electrical behavior of arc welding equipments is presented. The method is based on the electrical arc fundamentals and it is applied to Shielding Metal Arc Welding and to Gas Metal Arc Welding processes. For the first one, different arc points are achieved by practicing several arc lengths. For MIG process, different arc lengths are made by changing the feel wire velocity. Arc current and voltage are measured for the different arc length in both cases. Finally, a Gas Tungsten Arc Welding equipment has been used to obtain the electrical arc characteristics as a function of arc length. Different considerations about the thermal and electrical principles related to the arc behavior have been made.
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