Hario coffee mill powered by a motor
thingiverse
I got a worm geared motor out of old electornics (which cannot find any datasheet from the internet) and I just use it. This is just turn into my Hario coffee mill to be an auto grinder. You might need to adjust all the numbers inside if you want to fork this -- My printer is not so accurate. I failed making the coupler 3 times;; Instructions Print the checker board first to get your right dimension
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