As a US Marine Corps combat engineer serving in Iraq, Jim Monroe used MacGyver-like hacks to repair mine rollers. Meant to detonate and clear mines, these heavy studded wheels are mounted on the ...

An accessible 3D printer for metals has been the holy grail of amateur printer builders since at least the beginning of the RepRap project, but as tends to be the case with holy grails, it’s proven ...

Now printers can make metal objects quickly and cheaply. While 3-D printing has been around for decades, it has remained largely in the domain of hobbyists and designers producing one-off prototypes.

3D printing has proven itself as a low-volume option for one-offs, prototypes, and — for those determined to use 3D printing — low-volume production. Regardless of the material, be it plastic, ...