Super Simple Belt Tensioner

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Super simple belt tensioner for the Wanhao Duplicator i3 (and similar printers). Using this you can have easy-install and easy-tighten belts without the issues caused by the built-in spring tensioners. It's a quick print and works on both the X and Y axis. In addition to the two printed parts, you'll need: - 1x M3 22mm bolt -- You could use a different length, but 22mm is what I used. Any longer and you'll have to either modify the model or hold it steady by hand while screwing in the first few mms until the guide grooves engage. Any shorter and you'll lose variable length and have to use a tighter initial state for the belts. - 1x M3 nut -- Nylocs are preferred to keep the belts from loosening. - (optional) small zip ties -- For managing the excess belt length.