How to save a Mechanical Desktop 3D model to the STL format?

To save (export) an AutoCAD 3D model for 3D printers, to the stereolithography file format STL you can use the STLOUT command. For models created using the mechanical (AMxxxx) commands in Mechanical Desktop you should use the "AM" version of this command - AMSTLOUT.

This enhanced version of STLOUT - AMSTLOUT - supports mechanical solids and assemblies, has more control over the quality of the exported model (facetres, aspect ratio, angular tolerance, surface tolerance, vertex spacing) and the model doesn't need to be in the positive X-Y-Z octant.