The part was marked using a 20 watt q-switched ytterbium fiber laser with 160 mm focal length lens. The 160mm focal length lens has a working distance of 176mm from lens to part. The steel sample was surface annealed, and required two passes each. The sample had the a cycle time of 12.11 seconds. The first passes required 17 watts of power, had a frequency of 80kHz and a speed of 3 inches per second. The second pass required 6 watts of power, had a frequency of 25kHz and a speed of 25 inches per second.


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