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A comment on Show HN: I built a CNC-machine from scratch, using 40x 3D-printed parts. Parent comment

Re:Show HN: I built a CNC-machine from scratch, using 40x 3D... by zwieback on Wednesday November 03, 2021 @01:04PM (#29097402)
Awesome. Can it mill aluminum? If so, would you consider replacing some of the 3D printed parts with machined parts?
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Re:Show HN: I built a CNC-machine from scratch, using 40x 3D... by mfi on Wednesday November 03, 2021 @01:12PM (#29097524)
Yeah it can! Ivan Miranda, the guy who has created the blueprints actually updated his machine with aluminium parts, milled on the CNC-machine. That might be something I'll do in the future!
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Re:Show HN: I built a CNC-machine from scratch, using 40x 3D... by jhgb on Wednesday November 03, 2021 @01:38PM (#29097894)
Von Neumann probe when?
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Re:Show HN: I built a CNC-machine from scratch, using 40x 3D... by jacquesm on Wednesday November 03, 2021 @05:31PM (#29100561)
Right after you figure out how to 3D print solid rocket fuel without things going 'bang' prematurely.
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Re:Show HN: I built a CNC-machine from scratch, using 40x 3D... by yetihehe on Thursday November 04, 2021 @03:25AM (#29104324)
If you print Potassium Nitrate/Sorbitol[0] with direct granule extruder[1] you could do it. But this will probably need additional toolhead for engine body[2] (plastic-fiber composites DO have enough strength to survive using KNSB in engine, I've seen tests, but those are not publicly available) and for ceramic nozzle[3]. With some experimenting, probably doable.

[0] http://www.nakka-rocketry.net/sorb.html

[1] https://hackaday.io/project/181165-my-machinery-2021-direct-...

[2] https://www.sciencedirect.com/science/article/pii/S221282711...

[3] https://reprap.org/wiki/Ceramic_Extrusion

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