Main thing to take note of here is the curvatures you can obtain, especially roofs, that take wind loads down drastically. That alone from a structural aspect makes it easier to pass codes/allowables than ‘box” structures we know today. The remote tool design and production planning here needs development, a way to control a NC head I show in the picture above. Anyone that thinks this world cannot solve small tool design issues such as this knows what they don’t. If we can build an aircraft out of a plastic skin such as the Boeing Dreamliner I helped design and build btw, this will be a walk in the park. There are other issues not addressed in this video of a bigger concern I’ll get to shortly.
The process you are referring to is Stereolithography (SLA), old and outdated that was very slow and produced brittle parts. We use to use it 20 years ago, it may be older than that. Today, Fused Deposition Modeling (FDM) I show above and Selective Laser Sintering (SLS) which has been around longer. FDM and SLS companies have got rid of their SLA machines. FDM (my parts) needs support structure as you ‘grow’ the part. What I mean by grow, think of spaghetti or lasagna strands of plastic being layer on top of one another that are heat and pressure fused together, the CAD model is scanned in .005-.015 increments to lay down another strand. As you might imagine where the fusion takes place is the weak link so, it is critical in FDM how you grow the part (what axis) that is based on the service loads. In some cases, you have to grow two parts two different directions then bond them together (another weak link). It is comparable to grain structure in wood where there are different properties across it vs along it. So this is a big challenge for homes since there are so many directions to satisfy loads, when considering a whole house design-build. Another challenge is “support structure”. What I mean here is as you grow the part you often need it to support the design from collapsing until the part is complete. The manufacturing engineer will add it to the designers model, trick is not trapping it so it can be removed later.The architecture firm my wife used to work for had one. Coolest thing. Only drawback... it took foooooooreeeeeeeeeeeeever to make aaaaaaaanything. If you wanted a model chair, program it at the end of the day, it'll be done by the next morning.
Agree, a lack of knowledge still exist in the aircraft industry for structural applications. Next time you fly or drive your car look around many of those interior plastic parts are made or are being replaced by this technology. My design reduced labor and material ( compared to metal, fiberglass or graphite lay-ups) cost by 2/3.My prediction for the 3D printer is that there will be a bunch of people using it to build stuff that doesn't work or is otherwise non-functional.
I agree that it's a game changer, but because you still need to have some degree of knowledge and expertise about the item that you are creating, I seriously doubt that this will eliminate the need for skilled craftsmen.
As an example, if you printed a house room by room, you still need guys on site to dig the footings and to make sure that the framing is secured to the foundation, etc..
The 3D printer won't replace framing crews. It will just enable the crews to build more buildings in less time. Then I also figure that even in pre-fab construction, there is still a degree of stick-building that you have to do on site to fill in the gaps that the engineers in the factory could not replicate from the drawings.