Mill is being squeezed from the top and bottom, and the lanky Robbins is perfect for the part: watching him under stress is like seeing atubeoftoothpaste bunch up in the middle.
Also on view are four of his recent "Extrusion" benches, made without nuts and bolts by squeezing red-hot aluminum out ofa machine as one might pinch toothpaste out ofa plastic tube.
These printers use something like atoothpastetubeof plastic or other material held vertically in an X-Y plotter that squirts out thin layers of tiny dots of material that build up, layer by layer, to produce a 3D replica of the computer-generated design.