Conventional MIG-MAG short arc welding processes are only suitable for this in an extremely limited way as the material transfer is usually performed almost explosively, the molten pool therefore falls through or the weld is pressed through the gap too strongly and irregularly. In contrast to this, the practically spatter-free SpeedRoot operates with a very low energy input. Only exactly the levels of current and voltage are used that guarantee a high process stability and ensure a perfect, slightly vaulted weld appearance.

The high-end control technology of the MIG-MAG high performance power sources from Lorch ensures a "cold" material transfer with targeted energy-reduced energy short circuit resolution afterwards. The exact timing of low energy input and optimum droplet transfer is decisive here. The SpeedRoot is distinguished by the combination of minimal energy input and maximum gap tolerance and gap bridging. A 4 mm gap for 3 mm thick sheet steel can be bridged easily without any weaving. An optimum weld appearance is guaranteed in doing so. Even for an 8 mm gap, SpeedRoot provides optimum weld pool control and the oscillating movements can be performed easily and effortlessly.

Typically for Lorch, attention has also been paid to easy operation and perfect handling for this process. The high process stability enables easy torch guidance and even allows high quality root and thin sheet metal welding for inexperienced welders and significantly reduces the reworking effort. In this way, and also because SpeedRoot is approx. 3 times as fast as the TIG process mainly used in practice for root welding, SpeedRoot contributes to the increase in productivity and acceleration of production processes and rounds off the Speed process family from Lorch.

The SpeedRoot for all S-SpeedPulse and P-synergic systems from Lorch will be available from January 2011.