Laser marking was done with three different parts which were all marked with the 20-watt q-switched ytterbium fiber laser. The parameters used varied slightly from part to part. The parts were marked with a bold Arial font, with the exception of the markings on the smallest screw head. The parts were marked with a very light etch to produce the best contrast. The small 0.370” diameter screw head had a cycle time of 0.497 seconds. The larger 0.78” diameter screw head had a cycle time of 1.89 seconds and the black-coated 0.960 diameter washer had a cycle time of 2.53 seconds.
