Holes cutting undersized unless separated to another layer

LightBurn Software Questions
,
1

I’m having a strange issue in LightBurn with an OMTech 80W Ruida.

  • Importing a part via DXF (see screenshot)

  • Outer profile + holes are on the same layer

  • Cut order is correct (holes first, outer last)

Problem:

  • Outer dimensions are accurate

  • Holes cut .16’’ rather than .21” as drawn

But:

  • If I move the holes to a separate layer and run the exact same job
    → Everything cuts perfectly to size

Same speed/power settings in both cases.

Has anyone seen this behavior where same-layer cuts affect hole size, but splitting layers fixes it? Any ideas?

Thanks! - Ty

Screenshot 2026-04-21 at 6.00.08 PM
Screenshot 2026-04-21 at 6.00.08 PM1602×801 60.6 KB

2

Do you have a value set in kerf setting?

3 Likes
3

For the win, random kerf set on that layer, dont remember ever using it. Thank you!

1 Like
4

That’s fine, that was it. I’ve been dealing with Kerf a lot, so that’s why it hit me right away. :+1:

2 Likes
5

Enabling this setting prevents random layer edits from hanging around and messing up the next job:

2 Likes
6

Thank you!

7

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