3&Dbot Mobile 3D Printer

[3D OZ]

It could theoretically print an infinate diameter cylinder if it could drive AROUND the printed piece, so not moving in only X/Y but rotating around the centre of the cylinder.
That said it is still largely useless or at least there are much better ways of acheiving whatever it is the designer is trying to achieve.
Seems like a lot of recent 3D "Developments" are exercises in doing something just to see if it can be done without any consideration for need.

[MarcC]

Seems like a lot of recent 3D "Developments" are exercises in doing something just to see if it can be done without any consideration for need.[/QUOTE]

That depends completely on somebody's (blinkered) perspective, this seems like it could be scaled and refined, of the top of my head how about 3D printing for dangerous environments such as: sea floor well capping, sealing failed nuclear reactors, repairing the pierced hull of a spaceship, remotely building off world habitation. Who knows?