KME 4000 is the new multifunction synergic inverter-based generator with separate wire feed, for use in short/spray and pulsed arc* (* optional) MIG/MAG wire welding on steel, stainless steel and aluminium and in welding with coated electrodes (MMA). The inverter technology and the special design features have contributed to the reduction in weight and size, as well as in absorbed power, without penalizing their reliability and performance. The welding process, controlled by the microprocessor thousands of times per second, ensures stable and almost spatter-free welding, exceptional dynamics (even at low amperage), and perfect arc start. The user-friendly and intuitive control board allows to quickly set the welding parameters and displays their exact instant measurement, thus ensuring process quality and reproducibility. MMA welding operation allows adjustment of both Hot Start, to facilitate arc start when welding with coated electrodes, and Arc Force, to prevent these from sticking when welding. The power sources are equipped with appropriate safety devices to ensure their performance. A temperature sensor and the mains voltage control (fluctuations between -10% and +10% of the nominal value) protect the internal components. Versions available are the air-cooling-on-trolley and the water-cooled version (with built-in torch cooling unit).