Around-the-nozzle cooling ring
thingiverse
This redesigned cooling solution is inspired by a previous design but modified to suit a MakerGear stepper plastruder on a Thing-o-Matic. It features a circular nozzle that mounts under the Z-stage and is fed by two 1/4" PVC hoses connected to a fan mounted on top of the Z-stage. The design offers subtle airflow detectable only with the hand yet significantly improves print quality for small parts. The model is in parametric OpenSCAD, allowing easy adaptation to different nozzle types and fan sizes. Ensure there's enough clearance around the nozzle and adjust the OpenSCAD sources for your nozzle geometry and fan radius. Print both parts with attention to overhangs, clean up with a knife, and test-fit the fan before hot gluing it in place. Attach suitable lengths of 1/4" PVC tubing to the hose barbs, affix the fan mount to your Z-stage, run power to the fan from a nearby 12V DC source, route the hoses through Z-stage holes, and fit the nozzle in place. Secure with zip ties, and finish by testing with a print.
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