444

This metal discs with a dark mark was marked with a 20 watt q-switched ytterbium fiber laser and required two passes. The first pass used 16 watts of power with a frequency of 20kHz and 160mm focal length lens. The first pass marked the part at 4 inches per second. The second pass used 10 watts of power with a frequency of 20kHz and 160mm focal length lens. The second pass marked the part at 50 inches per second, resulting in a cycle time of 32.85 seconds. The part was annealed to create the dark mark.