Anet A8 slim and robust x-axis tensioner

thingiverse

This y-belt tensioner **combines several benefits** of other designs: 1. shifts the force of tension from z-axis to x-axis rods to prevent z-axis warping (similar to many others e.g. [this](https://www.thingiverse.com/thing:1683070) or [this](https://www.thingiverse.com/thing:1921667)) 2. allows existing belt and pulley reuse by placing pulley to the left of x-axis mount (e.g. like [this](https://www.thingiverse.com/thing:1999669)) 3. doesn't increase printer footprint, i.e. no parts will stick out to right (similar to [this](https://www.thingiverse.com/thing:2196516)) 4. is sturdy (like [this](https://www.thingiverse.com/thing:2461317)) 5. doesn't cut into x-axis width (other than e.g. [this](https://www.thingiverse.com/thing:1999669)) 6. features a minimalist design, keeping things as simple as possible, but not overly so I generally liked [lokster](https://www.thingiverse.com/lokster/about)'s [solution](https://www.thingiverse.com/thing:2196516) due to compliance with design goal 3, but as [some reported problems](https://www.thingiverse.com/thing:2196516/) (comment 1402077 by mcorl) regarding the strength of cap part, and [this](https://www.thingiverse.com/thing:2461317) improvement conflicted with design goal 3, I moved reinforcing parts to go inside right-hand z-axis mount. Accordingly, I shortened pulley part, which gave me opportunity to also make it a bit lighter. All my Anet A8 designs: * [Anet A8 lightweight and unobtrusive X-axis cable chain](https://www.thingiverse.com/thing:2785408) * [Anet A8 slim and robust x-axis tensioner](https://www.thingiverse.com/thing:2802815) * [Anet A8 power supply cover with LCD power meter and switch](https://www.thingiverse.com/thing:2815307)