Lightburn unexpected "islands" on closed path

LightBurn Software Questions
1

Hi everyone,

I’m encountering a strange behavior in LightBurn version 1.7.08 and would like to understand if it’s a bug or expected behavior.

When I create a closed path where the lines or curves come very close together (but do not touch or overlap), LightBurn sometimes treats the shape as if it contains an “island”, the preview shows it cutting as if there’s an inner shape, even though there isn’t. However, if I add an extra outline around the original path on the same layer, the island effect disappears and the shape cuts normally, without any false island showing up. And strangely enough it cuts the islands last, after it already cut the “main path”.

You guys can see my problem below in the screenshots.

1
11376×1045 51.9 KB

2
21376×1045 43.4 KB

3
3773×595 39.6 KB

4
4485×435 12.6 KB

Has anyone experienced something similar? Is there a known workaround or setting to prevent this?

Thanks in advance!

2

Only setting I know is the overlapping lines that is turned off in your picture.

1 Like
3

Yeah, at first I thought it was that setting too, but it seems to have no effect on this particular case.

Thanks anyway

4

Do you have a + kerf setting?

4 Likes
5

Yes! Indeed I do. And upon removing the positive kerf my problem is solved!

Still weird that putting something around it makes it behave normal though.

Many thanks guys, and sorry for the trouble!

1 Like
6

Using kerf moves the tool path in or out from the selected objects. If the tool path ends up isolating an island, that happens.

:smiley_cat:

1 Like