Problem with gcode

laser cut into circle but not round at all, the zig zac appear instead
i think something wrong with gcode

A few questions:

  1. What sort of laser is this being run on?
  2. Can you take a screenshot of LightBurn showing the design
  3. Can you post the gcode file here? Change the file extension to .txt first

i use mks dlc32 board with neje 4060 laser, frame dyi
gcode.txt (2.7 KB)

There are likely a couple of things going on:

  1. The symptoms you’re seeing indicate a license validation issue. What type of key are you using and did you download the file from LightBurn site directly? Send an email to with your specifics and they can help sort out key issues if a legitimate key is not being validated properly. If you’re not on a legitimate key, purchase one on the site.
  2. Gcode clustering is likely not supported on your controller so confirm that it is before using. If not, disable clustering in Edit->Device Settings.
  3. You may additionally have a mechanical issue but it’s not as clear with the other artifacts you’re getting. I’d suggest resolving the first two issues first and then revisiting.

This is typical of an invalid Lic Key, there are a few that sell illegitimate copies of Lightburn.

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