100w CO2, 200mm/s, 13%, 500dpi, .03(or maybe it’s .003, I’m not in my garage ATM)dot width correction, Jarvis.
I took a few days to pin down getting what I feel is the best detail out of flat glass. I made an AI image with different details types; hair, blurred/dusty, clothing, etc. I decided to try a big piece of glass, it’s about 14"x18".
I think it turned out really cool. But, now that it’s all finished, I’m noticing some lines in the etching, and I’m curious why they would be there. I have small line spacing, and it’s moving pretty slow.
What are some possible reasons for this? Maybe just the glass itself? It is older glass.
I watched the laser everything video on line interval/DPI, and came out with 500 DPI. It’s also the manufacturer recommended DPI, though I understand the manufacturer recommended settings don’t necessarily speak for much. I’ve tested lower dpi, with most materials I have, and it’s turns out noticably less quality.
As far as resolution of the image itself, it’s 4k, so I should be able to blow it up to quite a large size before noticing visual defects.
I’m going to run another large piece this weekend, about 15"x15". So I’ll see if maybe it was just a one off thing with the glass. It’ll be a different image too. Other than those lines, and it taking so long, I’m happy with the process. I was so scared I was going to break the thin glass the whole time
I wonder that the lines are there all over your image with precis distance from each other.
I will try to make a test, with the same settings but with the glass turned 90 degree, only to see the result. If the suggestions from @jkwilborn also do not help and the same lines appear again, I will look for possible electric “disorders” or something that stops and starts, pump, compressor …
I haven’t made anything that large before, of any material (I’m still new), so I’m unsure where the problem may lie. The image seemed fine digitally blown up (no lines or distortion), and was fine in my 80x100mm tests.
this is zoomed in pretty far in photoshop. i inverted the image as i have it set to negative in Lightburn, so this is how it burns. I see no lines anywhere, even if i zoom in further to pixel level. I feel safe in saying it isn’t the file itself, at least pre-Lightburn anyway. It is entirely possible that the glass itself has some distortion that wasn’t seen until it was engraved and painted.
