Anet A6 Y Axis Belt Tensioner and Belt Holder

thingiverse

I was using https://www.thingiverse.com/thing:1959208 until the frames snapped - the use of a nut made them too weak to last any length of time. Taking lessons learned from the failures of the one above, I designed my own with several key improvements: * The area where the bearings mount has a standoff so that the bearings can rotate freely. * The frames have a nut trap on one frame and a counterbore on the other so an M3 cap head screw can be used to mount the bearings. * The frame arms are now correctly spaced and sized. I found that the originals didn't fit as their spacing was out, requiring a fair bit of filing. * I've done away with the requirement to use nuts to mount the frames to the front plate. The cutouts required for nuts severely weakened the frames. The holes are 25mm deep, and should be tapped with an M3 tap. * The front plate has been reduced in size and has counterbores so that cap head screws can be used to fasten the frames. * The idler is now level with the motor. I have also included a Y belt holder that lines everything up much better than stock. This brings the belt horizontal and parallel, reducing inaccuracies. Another similar one exists on TV, but I found that it did not move the belt down far enough. I strongly suggest replacing the idler bearings with a proper 16 toothed idler.