Can you set up a warnings on Lightburn?

Hi there!

Last night I was making some slate coasters and one of the designs had a super thin line that did not come out on the slate.
I was able to fix it by offsetting the lines just a hair and redoing just the thin line.

But my question is is there a parameter I can change where light burn will warn me if something is too thin so I don’t have to always be looking for it?


I don’t think it’s possible, LightBurn doesn’t “relate” to the effect of your power settings, it’s physically not possible. This applies in both directions, if one’s power supply to the CO2 tube is not physically reduced to the tube’s nominal power, it will without problems accept 100% from LightBurn and thus in a longer-lasting job destroy your tube. (if you don’t catch the bug in time)

That’s not a bad idea, however I don’t have an answer for how LightBurn would be able to discern something like that as a computer looking at your file. If LightBurn can’t ‘see’ it, we can’t warn you about it, so to speak.

That’s a good idea to put on our feature requests site here:

I don’t see how Lightburn can know if a thin line is intentional or accidental.

I was cutting some acrylic for the first time this past week and had some ins and outs that were apparently too close together. Having never cut acrylic, I didn’t even consider it getting too warm and softening to the point that it warped enough to cause it to droop. Even had a few fire flare-ups.
Being able to detect a direction change too close to where it was just located would be a nice addition.

Maybe even do the “Show me” routine like it does when attempting to Fill in an unclosed object.
Not to be a show stopper but to be a heads-up to warrant a closer look.

I’ve circumvented the issue for now by moving some of those cut lines to another layer. This way it forces the laser to go cut somewhere else to allow cooling, then return later.

Of course, you’d have to have your laser dialed in for this to work (which I believe I do).

I’d vote for the feature request if it’s generated.

As I wrote before, Lightburn “knows” not what power aetting your machine produces a “too thin” line.
You have the option in Material Library, to save your settings specific to all materials that fit specific to your machine. At the same time, you can write a note in your material library that makes you aware that material x must have n% power to give a visible line.
And finally, you have the opportunity to write yourself a remember/warning message that pops up before you can press the Start button. Mine is defined to remind me to start extraction, look for air bubbles in the cooling circuit and remind me to set the focus correctly.

I suppose it would be “do-able” with some user parameters (min dist between path segments, etc) but I find that simply setting my visible grid to 1mm gives me a close enough idea that it makes the hypothetical feature nearly moot for me. Anything under approx .5mm gets a little more scrutiny.

As said, programming-wise, it would be quite hard to do. You have to throw lines in all directions, and see if intersections are too close, perhaps? (Can be time-consuming.)

Of course, this would have to be parametrized in the settings (per layer? with a global default?), “too thin” is quite subjective. And you can trace lines without cutting, so for these, “too thin” might be moot (unless it is below the kerf, I suppose). And the concept can be different on wood, on acrylic, on cardboard, depending on thickness, etc.
Of course, this would be just a warning, so you can ignore it and go on anyway.

But the best way is probably to do tests and inspect the result.
I recently made complex designs with lot of details and thin lines, and I lowered the settings and cut some paper / cardboard before doing the wood, as it is less expensive.
This way, I would spot where the lines where too thin, and adjust the design accordingly.

Exactly. My tool of choice is the Preview window. It should not be on Lightburn to check your work. It checks for out of bounds, not subtle programming errors.

I open the Preview window 20-50 times in even a simple project. It shows me what lines I have selected. It shows me if lines connect, or not. It helps me assign select parts to different layers. It shows me computed laser direction and sequence to help with controlling workflow. In other words, I use the Preview almost as much as any other tool in Lightburn.

In more other words, I believe it is my responsibility to make sure the drawing is what I intended.

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