Thanks for the link Eddi ,

I downloaded the program an it seems quite nice .( and free )
My 3d cam program ( cut3d from vectric ) can import 3ds and stl so I can go straight from moi into that .It has a bit more features than freemill.
It's usefull for most routings but it routs in rasters like the "freemill" program .
For fast pocket and accurate routings in the main body shape it's easier to use 2 1/2 d cam ( with dxf )

Petr ,

I tried the ADmesh , It gives me a dxf but not really readable .
When I use for instance Blender . I can export from moi to blender in STL ( extruded ) .
I can take of the height visually but when I save to dxf in Blender it gives me a DXF file with the original height again.
Maybe I haven't studied Blender enough .
So I'll keep on trying .

Thanks ,

Paul