In concept, any machine that creates filament is pretty straightforward ... [Stefan] is moving towards recycling old prints and we look forward to seeing that video. We’ve seen quite a few ...

PETFusion 2.0 is both a PET (polyethylene terephthalate) bottle recycler and a custom 3D printing filament maker, with the ability to even apply your own ink/pigments to the filaments you make ...

As a proof of concept, it seems as though this machine was made from repurposed plastic, but it could also be made using whatever filament you happen to have on hand. As far as recycling goes ...