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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 ...


1

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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