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I think it's safe to say that there's at least one model of 3D printer that works in microgravity -- since one was sent to the International Space Station a few months ago. I presume the one there is an FDM type, as those need not be dependent on gravity; my Ender 3, for instance, has positive drive both ways on all three axes, so as long as the filament ...


Barrel's answer is absolutely correct, provided the printer doesn't have gratuitous dependencies on gravity. For example, a lot of high-end CoreXY designs I've seen, with 3 Z motors for automatic true leveling, rely on gravity to move/hold the bed in the -Z direction and only drive the +Z direction. This is often done for the purpose of decoupling from error ...

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