belt tensioner

Keep your belt tight, avoid slippage. reduce print failures.
Assemble as pictured. (Requires a bolt).

Print with 100% infill density, so that the part can be as strong as possible for whatever size you choose to scale it to. It will be holding stress, and you don't want this part to be the weak link that ruins a long print job.

Requires an additional bolt - designed for M2, but you can of course drill the hole wider to fit whatever you have. The hole should be sized so that your bolt has