SADEF provides special plug-ins for AutoCAD and other major CAD programs which allows users to import/export SCM format from common CAD drawings like those in DWG format. For more help, you would probably need to contact SADEF directly as it is not something commonly used.
Convert AutoCAD drawing to SadefCam file.
We found one software available in the database for this conversion.
Microsoft Windows software - convert dwg to scm on Windows
Leading 2D and 3D CAD development software from Autodesk
Convert from dwg file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.