[Joris Laarman] is working on a project called the MX3D-Metal which uses an ABB industrial robot arm and a welding machine to create strong metal structures on any working surface and in any direction.
He started last year with the MX3D Resin printer, which is the exact same concept, but instead of metal, it uses a two-part epoxy that bonds instantly upon mixing. Their lab is located in Amsterdam, and they work closely with IAAC (the Institute for Advanced Architecture of Catalonia) — Autodesk provides funding for the research.
[Joris] has successfully printed complex structures using steel, stainless steel, bronze, copper, and even aluminum. Poking around their website you can find many examples of different things they have printed, including intricate matrices of multiple curved lines which end up looking more organic than mechanical. It uses mostly the same concept as the Rostock Welding robot we covered a few months ago, which is open source and fairly cheap to make at home!
Stick around for a video of both the MX3D-Metal and Resin robot printers in action!