“G10 L2 P1 X0 Y-400” inside the Lightburn-Console will set the correct offset of the coordination system (permanently), so you can use homing and absolute positioning.
You can use “G10 L2 P1 X0 Y0” to change back to the standard offset of the coordination system (i have no idea if Luban uses these offsets).
Why does my current position does not correspond with the laser actually position?