Anet A6/A8 upgraded Y belt tensioner for use with 20T toothed idler, embedded nuts

thingiverse

This remix adjusts https://www.thingiverse.com/thing:1959208 to ensure the height matches that of the Y axis motor pulley when a 20-toothed toothed idler is used. Toothed idlers reduce belt wear and supposedly minimize vibration compared to smooth idlers, although this may be a placebo effect. The adjusted height works better with this Y belt attachment: https://www.thingiverse.com/thing:2333288, along with its remixes. I re-made the frame arms while keeping the rest of the design intact as it functions well. Only left arms are included; mirror them in your slicer to create a complete set. Two versions of the arms are available: standard and embeddable nut designs. To embed a nut, print it horizontally with the hexagonal side facing down and flat side up, stopping just before covering the nut hole using a slicer macro. Insert an M3 nut all the way in, then resume printing. Proceed at your own risk, especially if you have an expensive nozzle that might get damaged if bumped against the nut, which could stick out slightly. In my case, it doesn't, but if calibration is off, it might. The embedded nut design looks better, is stronger, and prevents the nut from falling out. Since I only needed one, I didn't test the standard version, but all dimensions match or are unchanged from the original design.