Manual ETD59 Coil Winder
thingiverse
Depending on your printer's precision, you may have to fine-tune the joints with a high-speed drill press like the Dremel. This is a simple and manual ETD59 core winder I've used to create the main transformer for my x-ray machine: https://hackaday.io/project/162928-3d-printed-x-ray-machine, which is powered by my Piernas's fast ZVS: https://hackaday.io/project/162935-piernass-fast-zvs-mazzilli-driver. The reel support is designed to work with Block's enameled wire (though you can use any wire you prefer), I used Block's 0.15mm wire to build a 5.5kV transformer.
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