The business end of the bending tool is the red-hot Nichrome wire running through the aluminum channel. That channel is used to protect the MDF and act as a spacer so that the wire doesn’t touch ...

All the parts are 3D-printed, with two NEMA 17 steppers taking care of both wire feed and moving the bending head. It appears that the head has multiple slots for tools of different shapes.

Professional tools often hold mysteries that DIYers never ... (Okay, sure, you actually need the spikes and wire-bending holes, too. The spikes are for reaming cut pipes, which is pretty important ...