Black Slate Engraving

Good Afternoon,

i’m trying to engrave on a black slate without much success , any suggestions on which setting should i use ?

I have a 20W diode laser.

Kind Regards,
Daniel

in focus I think about 25% power, try 100mm/s if your machine can do that?
Dither and not too high dpi try 300?

Ok, I’m feeling a little under powered. I would really like to photo engrave on slate, but I only have a 10 watt Longer Ray 5. Is there a starting place or am I looking for to much out of my 10 watt ?

10 watt should be plenty for engraving slate.

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