Using some dedicated 3D converter software like 3D Object Converter, it should be quite possible to at least partially re-save AC3D geometry files to Collada 3D format (*.dae).
Convert AC3D geometry data to Stereolithography CAD file.
We found 3 software records in the database related to .ac to .stl file format conversion.
Microsoft Windows software - convert ac to stl on Windows
3D viewer and converter with huge file type support
Convert from ac file format
|Yes, 3D Object Converter supports stl file conversion as a target file type.||No||No||No||No||No||No||No|
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned ac to stl. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Apple macOS / Mac OS X software - convert ac to stl on OS X
A Mac version of the popular 3D visualisation software
On-line services software - convert ac to stl on web
A free online 3D model conversion service