Magnet wire coil winder

myminifactory

This is a simple coil winder with a holder for the main magnet wire spool. The coil holder is designed to fit coils I make, but it's held by four screws and can be replaced with a different holder in just one minute. It has a cam where a microswitch (found on 3D printers) is installed for turn counting and a plate where I glued a modified calculator to act as a counter. To build it, I used a 1-meter-long M5 threaded rod and some M5 nuts and washers, along with two bearings that are 5x16x5mm in size for the turning axle. You can add bearings on the spool holder axles if you like, but I prefer using an aluminum tube without bearings because it provides a bit of friction to hold the wire in tension. The axis holes in the parts that fit on the coil winder axle are shaped for M5 nuts, so when everything is tightened, there's no need for set screws; instead, everything turns as a whole unit. The width of the assembly depends solely on the length of the threaded rods. 2 pieces of "Spalla.stl" 2 pieces of "Spalla interna.stl" 4 pieces of "Spessori.stl" And the rest is one piece each. As I used it with a small spool of wire, it wasn't very stable, so I added some blocks to fix the device to a board made of plywood or something heavy enough to hold it still while winding.