Microprocessor controlled, spot welding machine. It implements a new Fuzzy logic control system thatsimplifies its use and increases the spot welding quality. Suitable for spot welding of sheets with maximum thickness 2+2mm. Characteristics: automatic regulation of the spot welding current and time according to the material thickness * choice between continuous and pulse operation (suitable for sheets with high yield points - high stress) * arms pressure adjustable from 40 kg to 120 kg (with arms L= 120 mm) * handgrip made out of thermic isolating material * thermal protection.