DIY Electric Espresso Grinder

What have we here...
(answer: unfinished CAD)

DIY espresso maker requires a good grinder and my cheap self didn't feel like coughing up for a high end espresso grinder. Fortunately for me, someone gifted me a manual espresso grinder and although it works beautifully, my lazy self also got tired of having to hand grind beans. So naturally, I wondered "how hard could it be to motorize this?"

Turns out, not hard at all. With $21, 3D printed parts, and some doohickeys from the spare parts bin, here we are:

Sore forearms no more! Previously it would take me maybe 80-90 seconds of medium effort to grind 18g of beans for espresso. Now it takes maybe 60-70 seconds and no effort at all except flicking that (awesome) toggle switch on top on and off. 

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