DIY research – Adjustable, automatic belt tensioner

igu-award-adm | July 23, 2020

Adjustable, automatic belt tensioner for high speed FDM 3D printer. The bearing was used in two places: guiding the bearing housing and also acting as a support bearing for a simple, pin shaft.


We needed a smooth adjustment of the tension force, therefore a spring mechanism with perfect guide ability was needed. Pairing the igus bearings with ISO pins; we get a perfect clearance for bearing operation. For the support of the timing belt shaft to achieve a minimal mechanical dimension, the same bearing was used. Plastic also has a damping ability which is favorable for 3D printing machinery.

Good, reliable and robust belt tensioner without any need of maintenance. The tensioner has been built and we are very satisfied with its operation.

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