I’ve been sitting on this for a while, and I finally have some time (not much) to post something.
A while ago, an individual on the C3D forum asked me about creating a simple belt tensioner for his machine, a Shapeoko 3. I came up with this.
Someone here was watching and asked me to make an X-Carve version, so I did.
The short of it is that you can fine tune the belt tension by simply turning an M5 screw. The downside is that you need to cut a slot in some of your end plates (fairly easy to do in place, REALLY easy to do when disassembled).
Here are some renders and pics from my Beta tester on an X-Carve with upgraded plates…works the same on a standard X-Carve.
If anyone is interested, I will put the files up on Thingiverse.