Versalaser 3.50 laser weak near margin

[Mart_]

Hi just bought a 3.50 running the test file a have an strange result the engraving looks like it gets weak near the left side border

Looking for any inputs of what it can be

Thanks

Martin

[TDIPower]

could be the a difference in level/focus in that area

[Mart_]

Thanks ! everything seems nice and leveled. Piece is flat. From what i read it can also be laser beam alignment i'll start with that