Brian Minnick built a 3D printer that can (almost) print all of its own parts, paving the way for 3D printers that are able to self-replicate.
While a fully self-sufficient device is still a goal for the future, Minnick’s machine demonstrates all the elements that would be required for such a device.
His 3D-printed motor was created using a custom syringe-based extruder that applies molten solder to create the coils, before being sintered at a moderate temperature; the resistivity of these traces is as low as 0.001 Ω mm.
Minnick’s 3D-printed hot end leverages PEEK’s property of having a melting point that increases by about 110°C when annealed, meaning it can be used to print parts which can then be used to print other parts.
While a fully-functioning 3D printer that can print all of its own parts hasn’t yet been documented, the single-axis proof of concept in action is impressive in itself.
