Abstract: A voltaic arc processing apparatus and method are described for processing metal workpieces, like MMA electrode welding, TIG/MIG/MAG welding, plasma welding, plasma cuts, etc., in which a welding mask includes a protective head covering worn by an operator to protect eyesight from a very intense light emission produced during processing, two or more cameras arranged outside the protective head covering to send the images of the processing to a screen arranged inside the protective head covering and visible by the operator, wherein the operator can set one or more operating parameters of the processing that are displayed on the screen.