Solidworks is one of the companies that have committed to supporting the .3MF file format but I do not see it yet on the list of supported file types. Is there an anticipated date when it will be available to use rather than .STL
Support started with SOLIDWORKS 2015. Here is the help topic for SOLIDWORKS 2016 relating to 3MF and 3D printing:
2016 SOLIDWORKS Help - Print3D
I hope this helps,
It looks like SW 2017 supports exporting part and assembly files to 3mf.
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