Welding aluminum with robotic MIG welding equipment presents many challenges. The aluminum MIG process is not as forgiving as steel and requires special control to achieve successful results, and a good understanding of the welding process and how to control it from the robot are critical. From a robotic perspective, the welding process can be broken down into defined steps. Starting the arc can be one of the most difficult steps of the aluminum MIG process. Me- chanical properties of aluminum work against the welding process to make an arc more difficult to start. Some of the key factors that affect arc starts are base-metal oxidization, thermal conductivity, and soft or ductile filler wire.
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