The controlled parameters have been the top kerf, which is the width of the resultant cut (Fig. 2, left), the heat affected zone (HAZ) and the kerf taper angle tolerance. A visual inspection of each cut has been carried out to ensure that no pittings and burrs are present in the cut area [14]. Fig. 2 shows examples of the measurements taken. In the experiments, the kerf width, surface roughness and the HAZ have been measured, in a similar way to the method carried out in [15]. The kerf width has been measured using a digital photo method, measuring the pixels of the images of the cut parts (Fig. 2, left). The size of the HAZ, indicated as a distinct grey band (Fig. 2, center), was measured with a metallographic microscope. Finally, surface roughness and striation were measured using a roughness meter (Fig. 2, right). Temperature measurements have also been carried out using an infrared camera.