Except for the obvious choice - Autodesk AutoCAD, there should be some 3D/CAD translation or conversion programs available that can convert DWG drawings to NC1 files for CNC machines.
Convert AutoCAD drawing to Xsteel CAD drawing.
We found 3 software records in the database related to .dwg to .nc1 file format conversion.
Microsoft Windows software - convert dwg to nc1 on Windows
A CAD and Gerber conversion software
Convert from dwg file format
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 dwg to nc1. 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.
Leading 2D and 3D CAD development software from Autodesk
Apple macOS / Mac OS X software - convert dwg to nc1 on OS X
Mac version of popular Autodesk AutoCAD software