Comment by dd8601fn
13 hours ago
I remember hearing “trek replicator” in things like pop mechanics, back in the 90s.
Then it was a lot of “self replicating printers” for quite a while, which never has been a real thing.
Certainly there’s utility in the technology, and much moreso if you’re making aircraft parts. And I love prototyping with my various machines.
But I agree, it has had far more than its fair share of hype at the home printer level.
> Then it was a lot of “self replicating printers” for quite a while, which never has been a real thing.
3D-printed 3D printers got quite far; the reason why this topic got out of perception by people who are not 3D printing nerds is rather that for mass production of 3D printers there exist much better processes.
What was realized was that up to a certain amount of parts, 3D printing these parts on a 3D printer works really well. You can find a lot of designs of such 3D printers on the internet.
Concerning the progress here, also observe that over the last years, home 3D printers got a lot better with respect to handling "engineering materials". These materials are very useful if you want to (partly) 3D-print a 3D printer, but this development is often not associated with "3D-printing 3D printers". :-)
Then you get to parts which can be printed on a 3D printer, but these parts will not be of the same quality as parts that can easily be bought, such as belts etc. The Mulbot is a design that takes this approach very far:
> https://github.com/3dprintingworld/Mulbot
> https://www.printables.com/model/5995-mulbot-the-mostly-prin...
And then you get to parts that are nearly impossible to print on a 3D printer ...
So, after there was a consensus where the boundaries lie how much a 3D printer can sensibly be 3D-printed, people started looking at other manufacturing techniques that exist for producing parts of 3D printers, and started considering
1. could and how far could a machine for this process be 3D-printed (or produced on a 3D-printed machine)?
2. could we bring such a machine to home manufacturing, too (so that people can easily build such a machine at home)?
Machines that were considered for this were, for example, CNC mill (3, 4 and 5 axis), CNC lathe, pick and place machines (for producing PCBs), ...
There do exist partial implementations of such machines, just to give some examples:
- lots of designs of CNC mills that use 3D-printed parts. I won't give a list here, but just want to mention that the "Voron Cascade" project wants to do for home 3 axis CNC milling what the Voron did for 3D printing. Rumors on the internet say that the Voron Cascade is well on the way, but had quite a lot of delays with respect to announced release dates.
- an attempt to build a pick and place machine: https://hackaday.io/project/169354-3d-printed-pick-and-place...
Thus: I hope I could give evidence that in the last years there still were a lot of developments towards the far goal of "self-replicating 3D printers", but these developments were rather silent, impressive developments instead of loud, obtrusive marketing stunts.