I finished the coil winder a month or so ago and since I’ve used it a great deal. It was definitely worth the effort to build. It lets me make 1500 turn inductors in a matter of minutes. Coupled with Makespace’s Form1 to print coil formers, the results started to look pretty professional.
I ended up driving the stepper from an STM32 Nucleo F030. It is programmed so a push of the user tact switch will trigger an interrupt and the board will micro-step the motor for 100 revolutions. This gives a bit more control than just sending it off on the whole 1500 turns at once. Using the Nucleo board also meant I didn’t have to add a separate button, as I would have using an Arduino.
For the last few years, I have repeatedly and frequently needed to wind a wire around a thing. From making RFID antenna to transformers. I switched job about 6 months ago and naively thought my winding days were over. However, I was wrong. By some freak accident, I’m back winding wire onto ferrite rods. This time though I need to make some whopping 1H inductors. I’m not going to sit here and wind a thousand turns by hand, not while I have a stepper motor, a microcontroller and a makespace next door.
After a couple of hours on Fusion360 I had a design and I was off to laser cut it. Doesn’t look too bad. The rest of the parts should arrive tomorrow when I can finish this beast.