3DPrinting

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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: [email protected] or [email protected]

There are CAD communities available at: [email protected] or [email protected]

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founded 1 year ago

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New York Bill Would Require a Criminal Background Check to Buy a 3D Printer (gizmodo.com)

submitted 1 year ago by [email protected] to c/[email protected]

163 comments fedilink hide all child comments

I understand the intent, but feel that there are so many other loopholes that put much worse weapons on the street than a printer. Besides, my prints can barely sustain normal use, much less a bullet being fired from them. I would think that this is more of a risk to the person holding the gun than who it's pointing at.

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[–] [email protected] 74 points 1 year ago (12 children)

Do I need a background check to buy a CNC? Or a lathe?

[–] [email protected] 15 points 1 year ago* (last edited 1 year ago) (9 children)

I mean, kind of, yes. CNCs have been one of the big items for export controls. Especially if they can be used to build weapons, parts for nuclear subs, etc.

Generally speaking, lathes and milling machines must be licensed for export if their accuracy exceeds six microns. Grinding machines are controlled at four microns. The Wassenaar Arrangement controls all machine tools capable of simultaneous, five-axis motion, regardless of machining accuracy.

Source

[–] [email protected] 3 points 1 year ago (2 children)

six microns

Given that human chromosomes are on the order of 5 to 10 microns, I am thinking this export regulation doesn't apply to the hobby market. This is "use the machine in a clean room" level precision.

[–] [email protected] 1 points 1 year ago (1 children)

@FearTheCron @YourAvgDuckHead According to encyclopedia Britannica, I'd say a fairly reliable source, your out by a factor of 100. https://www.britannica.com/science/chromosome
A human blood cell is approx 10 micron long, according to this... https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2998922/
Apologies for the pedantry, I couldn't help it.

[–] [email protected] 2 points 1 year ago

Hehe, I just grabbed the number off wolfram alpha's size comparison. Wouldn't surprise me if they are wrong, not sure where they scrape the data from. Anyway, my point stands, six microns is still stupidly small. Some dust or hair on the cutting edge and your precision is now out the window.

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