Belt tensioner
thingiverse
This belt tensioner is specifically designed for Wanhao i3 Mini printers but should work just fine with many other types of printers where the belt is mounted in the same way. It requires two M5 screws, which are pretty standard, so you'll likely have them on hand already. You can choose to include screw caps if you want - they're optional, but they do help protect the bed trolley from scratches. If you've got the Mini firmware installed with a 160x130x130 build volume, you might find that this tensioner comes in handy for making use of the full y-axis length.
With this file you will be able to print Belt tensioner with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Belt tensioner.