Home position changes between cuts

I have k40 laser with cohesion3D. My problem is I have to click on “home” button and “go to origin” between cuts if not the laser stops on another position.
Even doing that my engraving is decaled like you can see

Here I selected “fill and line” : the line is decaled
The outline is very decaled but before I’m clicking on “Home” and “Go to origin”

My home is absolute : 0;0

Precisions :
When I test the positioning of the laser with Lightburn, everything is fine. I place the laser at the origin then give it coordinates and it moves correctly.
But when I launch a job from lightburn, the positioning is bad. If I vertically center the project, it starts at the bottom of the bed. In addition, the positioning of the work changes during layers.

This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.