I’ve been using Adobe Illustrator 2023 to create files to import into Lightburn and have had no problem. But in the last couple of days anything imported from Illustrator and set to line in LB wil burn in one direction and then reverse and repeat the cut in the opposite direction. I’ve looked through the forum for a solution but nothing I’ve found works. Deleting duplicates just says there’s no duplicates to delete and saving the file with a stroke width of zero and importing it just doesn’t show up.
Even files thet were created some time ago and imported and cut in a single pass are now cutting twice.
As it has worked flawessly in the past I imagine a setting has changed. I need to know which one so I can correct it.
Cheers
Geoff
Can you upload your Lightburn file?
In a first approach, I would enlarge the drawing as much as possible to check whether it is actually a single line or two (or more) lines that are too close together. 
Zoom all the way in. This works, I know.
Hi
I zoomed in and, yes there are two lines. As I said, until a few days ago this wasn’t happening and as I mentioned, files created in the past never created two lines when importing but they do now. These files haven’t been touched for weeks or months but now import with the two lines, which looks to me like I’ve inadvertantly changed something in LB. I just want to know what it is so I can reset it.
You could try importing into another CAD program (like nanocad, fusion, etc) and see if the lines come in there as well.
Sorry, I don’t have any CAD programs
Some questions:
- What format from AI are you importing?
- What version of LightBurn are you using?
- Are you absolutely certain that an old existing file from AI that previously imported with a single line is now importing with a double line? It’s unlikely that a change in LightBurn would be responsible for this so want to be very clear on this behavior.
- Are both sets of lines vectors?
- Can you upload a simple AI file that shows this behavior?
If you “Outline the stroke” of a path(s) in Illustrator, it will create a path on the inside of the stroke width and the outside of the stroke width. I used to receive a lot of AI files in the past where this happened. Like you mentioned, LB wouldn’t do this on import.
Yeah. This is why I want to make sure I absolutely understand the stated behavior. A change on the AI side would more readily explain the symptoms. Getting different results in LightBurn with the exact same input file would be harder to explain.
1- I’m importing the file in AI format
2-LightBurn 1.4.00
3-Pretty sure although importing files older than the last 4 weeks are still importing correctly,
4-They both appear to be vectors.
5-It appears I can only upload LB files, not AI files
I don’t Outline the stroke in AI
Add a TXT to the end of the AI filename, or put a link to the file on Dropbox, Google Drive, or OneDrive
Clamp Spacer.ai.txt (209.8 KB)
Hammer - Copy2.ai.txt (1.2 MB)
Wall Cutout 1.ai.txt (1.2 MB)
Zero Clearance Insert.ai.txt (211.7 KB)
xxx.ai.txt (205.1 KB)
Here are 5 files. T
The wall cutout was created some time ago and still imports correctly. The clamp spacer imorted correctly initially but doesn’t now. The zero clearance has never imported correctly. The hammer copy2 was created months ago but I’ve only just created the square shape overlaying it and resaved it as a new file and it imports correctly, even the square. The xxx was created at the same time and in the same way as the modified hammer file and it imports with double lines.
Regarding the data in the AI files.
The Clamp Spacer file has “double lines” that are .1mm offset.
The Hammer - Copy file has “overlapping lines” in 6 places. Five of the shapes that overlap are the filled in shapes, and the exact same shapes that are not filled. Also, the perimeter is 2 duplicate shapes.
The Zero Clearance Insert file has “double lines” that are .1mm offset.
The XXX file has “double lines” that are .1mm offset.
Have you looked at the files in AI? I know those files import into LB with double lines, but I can see no double lines in AI and that’s the problem. I know the hammer has the overlapping lines, it was designed that way. The critical thing in that file is that the square was created at the same time as the xxx file and it doesn’t import with double lines.
Yes I did. You can see the “double lines” that are .1mm apart if you change the view in AI to “Outline”
I’ve looked at them in outline view at maximun magnification and still don’t see double lines
