Pulsed MIG/MAG welding is a variant of the conventional MIG/MAG welding process in which the current is pulsed. Pulsing was introduced originally for control of metal transfer at low mean current levels by imposing short duration high current pulses. The cycle consists of applying the repeated pulse current over a constant background current:
Of all the arc welding processes, TIG (tungsten inert gas) welding is capable of achieving the highest quality welds and is the most versatile in terms of what can be welded and the position of the welds. As in most industrial processes, however, quality comes at the expense of time and TIG is generally slower than MIG or MMA welding. But, where weld integrity is critical, production engineers are prepared to accept the additional process time.
In many cases, MIG gun consumables may be an afterthought in the welding process, as concerns with equipment, workflow, part design and more dominate the attention of welding operators, supervisors and others involved in the operation. Yet, these components — particularly contact tips — can have a significant impact on welding performance.