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Yup. Another tensioner. Except this one's really simple. And small. And bullet-proof. This one simple piece works for both the X and Y belts on the Jr. and probably any other printer that uses .2" pitch 1/4" width timing belts.
Grab a bag of #4-40 x 1" machine screws/nuts from Home depot. Press-fit the nuts and thread the screws through the tensioner and captive nuts. Pull belt taught and press the tensioner on. Fit will be snug. Fine-tune the tension via the screws. Play Deliverance on your now banjo-tight Printrbot belts.
Printrbot Jr. Belt Tensioner by 3d0g is licensed under the Creative Commons - Attribution - Share Alike license.
So what's this mean?
We're sure 3d0g would love to see what you've printed - take a photo and share it on Thingiverse as a Make.
To post a Make simply visit this Thing again and click I Made One to start uploading your photo. You can also download the Thingiverse Mobile app (available via Google Play and Apple App Store) to take a photo and upload your Make right from the app!