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.

The exhibition for the coil winding, electric motor, transformer and generator industries, returns to its Berlin venue and is expected to attract more than 550 exhibitors and around 6,500 visitors.