Rock Tumbler (No screws) Cheap and Easy.
Description
Building a rock tumbler. -I used PLA but I recommend using PETG or even ABS due to the warping properties of PLA over a long period of time. -The motor I used had a 100:1 gear ratio which is a bit over kill but I wouldn't recommend using anything less then 70:1. Anything will spin a little to fast.. The link https://www.pololu.com/category/116/37d-metal-gearmotors Feel free to remix
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