A challenge coin for our local utility provider
This video (not mine) provides excellent details on how to engrave brass coins on the F1 Ultra 20w
Settings:
laser type: Fiber IR
Number of layers: 256
Power: 95-100
Speed: 500-750
Pass: 1
Lines / cm: 300
Descend at the z-axis: on
Engraving angle: 15
For every N layers: 1
by N mm: .01
A fun coin to make