@solo said:

Very hard to say what is going wrong, will need more info, maybe images will help

Thanks Solo, i will try to explain...
the sketchup model has a lot of textures files, I export to obj but is something wrong with the way I export obj, probably i will have to optimize the textures. The obj files which work with my software have only one or a few texture file.
The problem could be the way I edit the modell before export it.

My machine only accept .dxf and I don't know how to convert with textures definition. only the block is converted.

I 'm a beginner in 3D technology.
I bought a 3D crystal laser engraving machine which accept files .dxf for engraving.
~I have been making some models in sketchup but when need to export to obj or dxf nothing works well. I know that the problem is my knowledge but I's like very much to get help to know what am I doing wrong.

Thanks for any help