this post was submitted on 14 Apr 2026
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Back when 3D printers were brand-new, I was at a college event where the Engineering Club had one on display. I stopped to watch it, and spoke with the kid who had built it. He was a Freshman, and had built it during the previous summer, because he wanted to come to college and make an instant splash in the Engineering Department.
He certainly succeeded, because he was the one in the booth that everybody wanted to talk to, while the upperclassmen that hadn't accomplished anything, sat in the back of the booth and glowered at the Freshman upstart.
So anyway, if they ban them, we'll just build them.
I believe the entire goal of RepRap was to build a machine that could build all the parts needed to build another machine. Most of the parts for a lot of machines are either 3d printable or bog-standard off-the-shelf parts that could be used for millions of other things. I have a feeling the really scary target would be software, something similar to the draconian age-verification BS being run around.
I don't see how they could realistically target Marlin firmware. It's incredibly straightforward software/firmware that could easily be forked and duplicated. Even the old driver boards (Ramps) were originally hand-made pcb's designed by fellow hobbyists.
They make it illegal to distribute, install, use, etc. They make it illegal to sell, distribute, build, etc. any printer that can run on Marlin (hoping to force manufacturers to block anyone installing non-oem firmware on the machines at all).
I'm not saying it's reasonable or feasible, but the people making the laws clearly don't know or care about any of that.
Edit - If they make enough stuff illegal, they don't need to catch you breaking the law when they decide to arrest you. They just arrest you and then figure out which crimes you were committing.
Targetting commercial offers would not cut it though. They would have to make octoprint, open source firmware etc a crime. A lot of printer run exclusively on non-commercial software and on Chinese control boards, with or without raspberry pi.
That's kind of what they already want to do, or are trying to do with this legislation. And the age verification stuff has no exception for open-source. The people behind this stuff absolutely want to kill any and all open source, both hardware and software.
This is called the proliferation of technology, its useless to fight it, and also one of humanities greatest existential threats.
Sooner or later building a nuke in your backyard is going to be just as easy.
Just FYI, I am full pro 3d printer, love mine. Looking into a second one now.
No. Even if you would get your hands of enough base material (impossible and would also be bigger than your backyard in volume). The energy you need for sorting the isotopes would be more than you could pull out of your power wires.
This isnt a question about technology but physics and energy, no matter how good consumer tech gets. NO you wont build a nuke in your backyard.
The same way as you will never build a moon rocket in your backyard, some things just require a fixed amount of energy, and putting that amount of energy in your backyard just wont happen.
"Get in good trouble, necessary trouble..."