The rig was based on the MoReCo Coilmaster, a machine that ... that drives the main winding shaft while powering a cam that guides the wire along the long axis of the coil form.

But if you’ve ever built one, you know how tedious winding the secondary coil is. So [Krux] decided to build a machine to do it ... using 22AWG magnet wire, meaning that’s a lot of turns!