A new method of joining galvanized sheet steel is the cold metal transfer (CMT) process developed by Fronius~(1-4). This method involves the use of a short-circuit arc, and its characteristics, which affect the suitability for welding thin-walled elements are: a small amount of heat input, very little spatter, and no need for treatment after welding. The CMT method is a revolution in welding technology, both in the field of equipment and applications, going far beyond the scope of the MIG/MAG welding applications.The CMT method can be summarized as a revolution in the field of GMA welding with numerical process control. The limited amount of heat input leads to smaller distortion and greater precision. During CMT welding, the droplet separation support technology is used. If the technological welding parameters are properly set, during the controlled contact between the electrode wire and the base material only one droplet is separated from the end of the wire.
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