Driving crazy with acryl

Community Laser Talk
1

Sup guys :slight_smile:

I dont know what i am doing wrong but i cant manage to get a perfect “milk” effect on my acryl projects.

I got it once. But idk how

If i redo the project it dont get that perfect like it did several days befor.

(See pictures)
(The Logo has a perfect “milk” engraved filling)
(Random picture with the Lines, btw doesnt matter if its a graphic or a picture)

There are always that lines you can see

I didnt change anything. Hardware is the same. Material is the same.

I tried thousands of different software setups.

Speed/power/intervall/ramps/with or without air/distance Z axis/dpi tests from 200-600

The hardware is pretty new. Less then 4 weeks
Its a omtech 50W Co2

IMG-20230304-WA0048
IMG-20230304-WA00481920×3413 447 KB

20230310_011943
20230310_0119432268×4032 503 KB

Hope some1 can help me :slight_smile:

Thanks so far

Edit:

It is GS acryl
Filling 180mm/s 10%

2

I think defocusing will help along with as little power as possible.

3

i thought the same and tried that allrdy
since it is the only thing which would explain that it got perfect only once.

the best distance from my laser head to the material is 17,3mm (made many tests)

should i increase or decrease the distance in your opinion ?
and how much ?

i am running a 1.5" lense (if that information is usefull)

4

Theoretically, it doesn’t matter. The laser beam has the shape of an hourglass, so it should be evenly distributed in plus and minus. But, I prefer to increase the distance when I work with glass, stone, ceramic and acrylic, that’s just my way of doing it.
The best advice I can give you is to find some material scraps and do tests with all the settings you can think of. If you then find the perfect setting for you and your machine, you “must” make a test print/cut with the correct values printed on the surface and save it. Make a beautiful test disc or square with a hole, then you can store them all in a row on the wall and find them quickly to compare them. AND - remember to make a new post in your own material library with the new materials. :+1:
(I use a 2" lens as standard)

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