It should be possible to convert IGES/IGS CAD formats to Autodesk Kaydara format (*.fbx) with the use of some dedicated CAD converter solutions.
Convert IGES 3D exchange format to Autodesk Kaydara 3D data exchange format.
We have found 3 software records in our database eligible for .iges to .fbx file format conversion.
Microsoft Windows software - convert iges to fbx on Windows
A widely-used 3D animation application from Autodesk
Convert from iges 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 iges to fbx. 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.
A 3D model converter
A 3D CAD translation softwate