To solve those problems, [Sandeep] came up with this clever and effective toroid winder. The idea is to pass a small spool of magnet wire through the toroid’s core while simultaneously rotating ...

Tapered spacers.To roll up barb wire, Cotherman made a spool, which bolts to the axle. The spool consists of disks cut from a 3⁄16" steel sheet, separated by spacers made from 1" square tubing.

The wire feed assembly went through a few design iterations before he discovered that a silicone cover was needed for the roller for the wire to properly track, and that the wire spool needed to ...