3DPrinting
3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.
The r/functionalprint community is now located at: or !functionalprint@fedia.io
There are CAD communities available at: !cad@lemmy.world or !freecad@lemmy.ml
Rules
-
No bigotry - including racism, sexism, ableism, homophobia, transphobia, or xenophobia. Code of Conduct.
-
Be respectful, especially when disagreeing. Everyone should feel welcome here.
-
No porn (NSFW prints are acceptable but must be marked NSFW)
-
No Ads / Spamming / Guerrilla Marketing
-
Do not create links to reddit
-
If you see an issue please flag it
-
No guns
-
No injury gore posts
If you need an easy way to host pictures, https://catbox.moe/ may be an option. Be ethical about what you post and donate if you are able or use this a lot. It is just an individual hosting content, not a company. The image embedding syntax for Lemmy is 
Moderation policy: Light, mostly invisible
view the rest of the comments
Yep. The way that is accomplished is that practically all governments that issue paper money add a specific pattern of five circles to it somewhere, often in numerous places. American 10, 20, 50 and 100 bills use repeating patterns of those numbers to disguise it, others hide or celebrate it in various ways. Any scanner, copier or printer is looking for that pattern, and if it sees it, it refuses to print it.
The problem to solve there is "is this 2D pattern present?" It's like asking if the word "soup" is printed somewhere on a page in Courier New, in terms of the computational power it takes to solve; it's just optical character recognition.
Prusa is evidently stupid enough to bake a bitmap image of the object to be printed in their G-Code file, but that could be stopped. The printer doesn't get to see the model file, only the hundreds of thousands of lines of G-Code that it is expected to obey as perfectly as it can.
There are still printers for sale today that run on Arduino Mega-based control boards; you want them to try answering "is this G-Code going to make a part of a gun" as a function of the firmware? Psh.