Jiri Praus enjoys using brass wire for his freeform sculptures, but isn’t a fan of making the same bends over again. To solve this problem, he designed a CNC machine to handle that task for him.
His device features a series of rollers to straighten out the wire, with a servo-driven puller that utilizes a roller normally used with a welding machine. A second servo then precisely bends the wire into shape, creating squares, hexagons and even springs under the control of an Arduino/CNC shield.
You can see the project in action in the videos below, and if you want to build your own, the STL files for this mostly 3D-printed setup are up on GitHub.