Fiber/Galvo: How to consistently get a variety of textured finishes

I have a 60W fiber mopa laser and I am engraving silver. I would like to find a range of settings that I can dial in and consistently produce a range of texured finishes in the areas that have been engraved.

I have mastered-ish the smooth finish but sometimes for artistic reasons i would like the engraved area to be bumpy: different grades of bump.

Anyone tried to do similar and have any tips to share before i embark on my testing as there are so many parameters that i can tweak and I would like to narrow this down.

I have: Qpulse, frequency, power, line space, speed, hatch direction…

Thank you.

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What I would try is varying line interval and add angle increment (If not rotary) with multiple passes. I did a silver ring and got a great background hatch by varying just the split and line interval. Experiment and post back.

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Interesting. I’ve tried “blasting” a texture. I added hatch as an after though to my list above.

I will give line spacing a go: to date i have picked one line spacing and not changed. May be varying line space and irregular rotation (i.e. does not regularly divide into 360).

I will post back. An unqualified observation i see is a limited sharing of parameters and findings in the “jewellery” end of this area.

Thank you for replying.

This can be accomplished by the technique that @Albroswift mentioned and by brute force of the fiber…

Changing power along with pulse width, q-pulse duration can really change the resultant surface.

This is two coins straight off the fiber, no post processing. Both are from the same batch of brass coins from Amazon. One has a rough finish and the other a very smooth finish.

I hammered the US seal with more power and a lower frequency of 100kHz, q-pulse of 250nS.

You can tell the discoloration of the coin… both back grounds are the same color, from the same place on my table.

Remember these are pulse machines, use that to your advantage.

Good luck



That’s a cool texture. I’m impressed with the regularity of the rough surface.

I can imagine a long qpulse ripping up the surface if done on low frequency and low speed. I figure i need to be careful not to blast a hole in the surface.

I appreciate the tip and example.

Take care.