Some scrap wood, a few pieces of sheet metal, a quartet of old gear motors, and a few basic hand tools. That’s all it takes to build an omni-bot with Mecanum wheels, if you’ve got a little know-how ...

You know you’re in for a treat when you are told that a lathe which can reach a resolution of one micrometer (1×10 −6, a millionth of a meter, or 0.00004″ for people who love zeros) is ‘not hard to ...