The PUK is a fine welding machine based on TIG welding technology. It generates an arc, also called plasma, for a brief moment, which generates a spot weld. The welding spots have diameters of approx. 0.2 - 3.7 mm. An electrode made of tungsten is clamped in the handpiece of the PUK, and the arc is ignited from its tip. Tungsten is the metal with the highest melting point (3422°C) - the electrode itself does not melt. The handling of the PUK is very simple: Through a microscope equipped with an eye protection filter, one looks at the electrode and guides the workpieces to it by hand. The welding spot is triggered automatically. Power (%), pulse duration (ms) and various welding pulse curves can be set easily and clearly on the PUK