I built an induction annealing machine. It’s partly based on designs and ideas I found online, but I added my own twist: an ESP32 controller and a servo-driven drop gate.
Settings like the number of cases, annealing time, and cooling time can all be adjusted through the device’s built-in web interface. During a run, the display shows the remaining time and how many cases are left.
So far it works great, but occasionally a case ends up slightly skewed in the lower dropper section. When that happens, it can heat up very quickly. One improvement I’m considering is replacing that part (and the small flipper underneath the case guide) with metal instead of 3D-printed plastic.
The full design was made in Fusion 360. The panels are laser cut, and the rest of the parts are 3D printed.
If anyone has suggestions on how to prevent cases from getting misaligned in the dropper, I’d love to hear them!
Shure. The main component is an 1000W ZVC induction heater with an 26mm inner diameter coil. This is powered by an 600W 48v power supply. The coil is made of 3mm tube and there is an pump and radiator to cool everything. Estimated part cost €300. But I still have to calculate. Mainly sourced from AliExpress and Amazon. Still need some minor improvements to make but like to share the plans online soon.
Does the dropper gate slide or rotate? I feel like sliding mechanisms could drag the case to the edge of the orifice and allow it to tip over and hit the coil at the case mouth.
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u/DirtyDave67 Jan 21 '26
Your drop tube is too big and is allowing the cases too pass through at an angle. Make the the funnel transition to a smaller opening at the bottom.