Modifying a stepper motor by drilling a hole down its shaft ... keep the coil roller in contact with the paper. A real-time coil winding session starts at the 21:18 mark, and we’ve got to ...

Even with the kinds of coils used in chokes and transformers ... An Arduino controls the rotation of both motors, controlling the number of windings and their spread on the form.

See All 9 Photos Exact specifics of the motor’s workings are still in short ... flux design that rings the stator with individual coil windings arrayed like pistons in a radial engine.