Equipment and Settings 

Comgrow 5 Watt laser running at 100% power and 10 mm/s engraving speed at 254 lines per inch

XTOOL D1 Pro 20 Watt laser running at 75% power and 20-40 mm/s engraving speed at 100-200 lines per cm

Monport K40 CO2 laser running at 60% (8 amps) power and 20-40 mm/s engraving speed at 320 lines per inch

XTOOL D1 Pro 2 Watt IR laser running at 100% power and 40 - 200 mm/s engraving speed at 100-200 lines per cm