Snapmaker Luban laser software size problem

Hi all, I’m having some problem with the laser engraving/cutting program,
every time that I try to upload a DXF file from any source when i pass from “modify” to “process” the program automatically change the size of he piece that i have to cut/engrave.
How can I solve this?
PS ( I can’t use an other type of file because is the only tie f file in common with Autocad )
Thnks :slight_smile: