Jagged and Incomplete Lines

I keep getting jagged incomplete lines throughout my burns. I am using lightburn and running at 800mm/m and 20% power on my Lu1-4 ortur laser. I have tried slower speeds, higher powers, different angles. I am not sure what to do. I tried focusing the laser, but I am not entirely sure I did it correctly. Any advice would be appreciated.

the material of the attached image is Birchwood. 800mm/m - 20%

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Can you see the laser light actively on as it’s going over those gap spots?

If so it’s likely that the material itself has something going on. Possibly a residue or something leftover from the manufacturing process.

Try a different material entirely that you know is clean and consistent.

Also, 800 mm/m may still be fast at that power level for a challenging material.

Some possible strategies to deal with the material issues is to try sanding the surface.

Was definitely some type of residue or coating. The burns looks perfect after a light sanding. Thank you