It should be quite possible to convert IGES models (.igs, .iges) to Autodesk Kaydara format (.fbx). You have several possible options for this, but one of the most convenient one would be to use 3ds Max or any other software with Kaydara format support. Some programs may require plug-in before they can work with FBX format.
Convert IGES 3D exchange format to Autodesk Kaydara 3D data exchange format.
We have found 3 software records in our database eligible for .igs to .fbx file format conversion.
Microsoft Windows software - convert igs to fbx on Windows
A widely-used 3D animation application from Autodesk
Convert from igs 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 igs 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