I've been out of the field for a while, so I don't really know the state of the art anymore. But I had the pleasure of visiting what was then called the Texas M

I've been out of the field for a while, so I don't really know the state of the art anymore. But I had the pleasure of visiting what was then called the Texas Microfactory. It's basically a sort of microvoxel printer, capable of moving components around on a small stage. Here's a link to a paper on the machine, I think: https://hal.archives-ouvertes.fr/hal-00417722/document https://hal.archives-ouvertes.fr/hal-00417722/document And a thesis on the gizmo: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.599.6325&rep=rep1&type=pdf http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.599... I haven't read it, but it does have some cool pictures around page 40. As you might imagine, control is the hard part. Damn thing was wobbly like all get out, to the point that it building anything at all was the impressive part. And it did - it wasn't practical for mass production, but it certainly could do cool things.