Problem engraving several layers

[parsec (FerAS)]

Was the plywood well fixed?

Run the file in the following post then post here pictures of the output:

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.

Also post your project .lbrn2 file for us to have a look.