Atomstack a40 max

[parsec (FerAS)]

It seems you have slope in you machine. Run the job in this post

Burn Offset LighutBurn 1.7.03

Given one picture and four words, I think @JimNM has nailed it. This test pattern helps identify mechanical problems: GrundTest.lbrn2 Scale it to fit the platform and run it as fast as it will go in Line mode with optimizations turned off and power set to mark a sheet of cardboard. Any differences from the design will be informative. Upload good photos of the result so we can look over your shoulder.

Then post here the output for us to look.
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And you have here some correction measures:

Mechanical Issues - LightBurn Documentation

Guide to mechanical adjustments and maintenance