STL Export for AutoCAD 

STL Export for AutoCAD is a plug-in for AutoCAD 2000, 2000i, 2002 and 2004. This plug-in gives AutoCAD the ability to export geometric data to ASCII as well as binary Stereolithography (STL) files.
stl export for autocad stl export export stl stl .stl export exporting autocad file stl file export stl file save save as