Keep the speed at 100mm/s, then run a material test varying only power 5-20%, and frequency 30-80 if that is your range.
What do you see?
Hi Nicholas. The first test was very light, it didn’t even score the material. So I ran it again at 50 mm/sec and it looks just like the first test!
Attached is another test that I did previously at 60 Hz.
Please ‘Edit Material Setting’ for the material test and change the mode from ‘Line’ to ‘Fill’ @ 300dpi and run again so the squares are properly filled in.
If you change the ‘Height’ of the Rows to just 3mm it will take up less space and turn off ‘Enable Border’.
But looking at the results I can see…maybe try that test image again with something like:
100mm/s
80kHz
Min 8%
Max 35%
Run it normally once, and a second time as a ‘Negative Image’.
The test looks good but (1) I did not see a dpi setting so I set the lines per inch to 300; (2) the only place I could find “invert” was in the preview window, however that did not work as both tests look the same.
Ok, that’s great.
It almost looks like the 18.8% power @40kHz is lighter looking than the 13.4% ?
If that is the case, try the test gradient image I sent you with grayscale settings of:
100mm/s
40kHz
Min 19%
Max 35%
Line interval 0.0847 (and try another at 0.1mm)
Hi Nicholas. Ran these this morning. No shading whatsoever. Test 3 is line interval 0.0847 and test 4 is 0.1mm. Thanks
Hi Gerald,
I’m not sure why you are not seeing a better result?
Please reply to your last open LightBurn support ticket, and paste in the data from (Help>Generate Support Data) and attach the LightBurn project file for that last ‘Test 3’ result.
Hi Gerald,
@Aaron.F has a similar (maybe even the same) machine as yours, interestingly, his results (so far) using Grayscale image mode are the same as yours…so now I am beginning to wonder if it might be something related to BSL control boards?
I have attached the project file if anybody else wants to give this same image a go for comparison? (Please and thankyou!) (@soniclab, @misken ?)
Here are my own results when running this on a Thunder Aurora 8 (JCZ board with a Raycus fiber source RFL-P20QB/20W/F160)
The settings that seemed to work well on my machine;
testgrayscale6.lbrn2 (473.9 KB)
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I’ve got exactly the same for my G2 Pro 30W.
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Here’s a picture of a Material Test with the settings @NicholasL suggested. It does cover a useful range.
But see this oddity with the power being stronger at some lower values:
@geraldz did you notice this on your G2?
You can import this Material Test preset if you rename this .txt file to .lbmt
G2-Engrave-Stainless.txt (1.3 KB)
I ran a few other Material Tests and tried the the grayscale mode.
There is a very slight shading visible but couldn’t get anywhere near to Nicolas’ results.
do you both use the same lens aswell? Focus distance matters too
Hi @Aaron.F . I ran your test file and it looks normal (unlike your result).
I have an f=210 lens but I don’t think this has anything to do with the issue. The laser works great for all image modes other than grayscale. For some reason Lightburn isn’t modulating the power.
I think you’re right, and @LightBurn mentioned today grayscale might not be supported yet for BSL so I’ve logged this as an issue for the dev team to look into.
Thankyou for bringing this to our attention!
Thank you for the test. That’s good to know and possibly a bad sign for my laser.
SALVE HO SEGUITO QUESTA DISCUSSIONE e anche io ho un 30w fibra non mopa e con la scala di grigio avevo lo stesso problema sig Geraldz ma grazie al test che ho scaricato sono riuscito ad ottenera un buon risultato , tanto materiale di consumo , ma alla fine sono soddisfatto allego foto e parametri per condividerli, non capisco perche tanti non divulgono i parametri
HELLO I FOLLOWED THIS DISCUSSION and I also have a 30w non-mopa fiber and with the gray scale I had the same problem Mr Geraldz but thanks to the test I downloaded I managed to get a good result, a lot of consumables, but in the end I am satisfied I attach photos and parameters to share them, I don’t understand why many do not disclose the parameters
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Hi @giopicc . I was excited to see your success. Unfortunately this does not work with my G2 PRO 30 watt because the frequency only goes up to 80 kHz
mi dispiace ho cercato di aiutarti comunque la HZ deve stare alta per scala di grigi