Hello, I am a new user of Lightburn and co2 lasers. I recently bought Chinese blue and gray (supposedly Om-tech 60w) via Amazon. I try to make a decent engraving on the glass, but I’m falling.
I have already changed one mirror as was damage, adjusted the mirrors and focus lance, adjusted the bed. It’s not perfect, but it’s in some range of tolerance. I’m still trying to improve. And yes, I watched a bunch of videos on you tube.
I have a question about lightburn regarding editing and engraving photos. I’m sorry, I’m a noob and English is not my mother tongue.
when I upload a photo (color, not edited) to lighturn. How do software decide how a gray shade turns into laser power? How many different shades can I get (output power)? I did some testing but the maximum value is 4, finish it if I set it up correctly.
If I load an image edited with (example) Img-r and set it to passthruo, but resized it to lightburn, is the DPI the same in the photo or is it recalculated with the new photo size. Sample. original size 30x20 dpi 318 with resizing to 20x10 which still has the same dpi or corresponds to the new size.
What type of protective tape do you use? I’m having trouble finding a good one. I am currently using an A4 sticker for printing and I believe this makes my engraving bad. I tried with a masking (blue, white) painting type, but they are also left lines on the engraving.
Greyscale is not the best format for lasering on Glass imo. I do quite a lot of work on glass.
Dither, stucki or Jarvis would work better.
On Glass you need black and white, you cannot burn different strengths (greyscale) into glass. it either breaks the surface of the glass or it doesn’t, understand? You are best to alter the image first before you bring it into LB, but adding contrast and burning areas to bring out the detail. Glass is NOTHING like burning on wood.
The DPI is set by the line interval, you can change this seperate to the Image size. and again on glass having 500dpi is pointless, 200 dpi max. As you are engraving by chipping the top surface of the glass away there is a limit on how much detail you can achieve, and a lower DPI in this case will actually work better for you.
you don’t actually need a tape on it, you can run the laser without. I have done quite a bit of testing and the difference is not worth the hassle of putting tape on, but normal masking tape works if necessary but you need to up the power to compensate for going through the tape.
I have 100w laser and usually run Glass engravings at 15 - 20% power and 250mm/sec Line interval 0.13mm, but it’s getting the image right in the first place that will give the best results
Pass-through is just that, LightBurn won’t do anything to the image and will pass it on as imported, unless you change the size or rotate the image. If you want the image to be resized or rotated in addition to the editing these external tools provide, do that work prior to importation and use Pass-through. External photo editing is not required, as LightBurn provide tools to achieve the same or better without the additional cost or time investment involved in these external image prep softwares.
To learn more about the LightBurn Image tools, this is worth review. Redirecting...
Thanks for replay and sorry about my english , trying to explaining things.
I wasn’t trying to engrave photo in grayscale as image mode, i was using jarvis end others… What i understand when you import photo in app its convert in grayscale . Than I was using jarvis , dither or other mode. When i test my laser 127 dpi (0.2 line interval) was as line to line and dot to dot ,but photo was terible. I can see with magnifaier how structure there are. Incrising to magic number (and i dont know way) 318 dpi the guality improve. But then i have to run on lower power with higher speed.
The protecting glass with sticker paper did kept image more sharp in my case and i had to incrise power.
Some my samples from today.
only removed background and left photo imported in LB end edited with i thing 400 dpi.
middle top in LB with only 127dpi. middle lover and right top in LB with different settings but same dpi 318.
last from Imgr-a dpi 318.
I’m on square one.
Unfortunately, the minimum order is 150 euro. And that is maximum when I don’t have to pay the tax when importing to EU.
" Due to EU restrictions the minimum export order must be over €150"
Sub Total €30.56
Delivery €31.25
VAT €0.00
Order Total €61.81
Even price for delivery could pass, but that is too much.
