The parts were engraved with a 20 watt q-switched ytterbium fiber laser and 160 mm focal length lens. The 160mm focal length lens has a working distance of 176mm from lens to part. The marks were done at 3 different depths using 2 passes, 4 passes and 6 passes. The artwork on the part was duplicated.
Process Parameters:
Material: Graphite
Power: 18 Watt
Method used: Engraving
Frequency: 25 kHz
Depth: Various
Speed: 5 inchsec
Laser Type: Q-Switched Fiber Laser
Focal Length Lens: 160mm
Cycle Time:
Marks 1 – 2 Passes – 32.59 Seconds
Marks 2 – 4 Passes – 65.17 Seconds
Marks 3 – 6 Passes – 97.75 Seconds