Y belt holder for Prusa Mini
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The R7 Y-axis belt-holder deforms with use and the belt loses tension.
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Model information
- Source
- Printables
- Category
- Prusa Parts & Upgrades
- License
- Creative Commons — Public Domain
In my case, if the tension of the Y axis belt is adjusted enough, and prints with many retractions are made, the belt holder deforms.

My solution was to close the upper slide to increase the resistance of the piece to a higher tension.

The tests I do include petg prints, (where the bed is warmest), and many retractions without any failure after more than 100 hours of use.
As the tests have only been done by me, for now I call it experimental 1 (Exp-1).
Print instructions
There are no special recommendations for printing, just use PETG.
Assemble
Follow the Prusa assembly guide for the Y axis, and cut the belt by approximately 2mm.