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Airmini CPAP Adapter


I needed a way to connect a proprietary hose fitting to a standard CPAP fitting. The connector has a lot of small parts in the 0.1 to 0.4mm feature size and needs to be reasonable airtight.

I used calipers to measure the dimensions I needed and modeled the part in OnShape:

On my first print, I did 2 degree tilts in the X and Y axes and used auto supports in Formware:

This printed out fine using the default settings for Green resin, but I accidentally broke the part.

Turns out that I don’t need quite so many supports, even for the overhang, because well-connected overhangs can print without support. So I printed again using a less aggressive support strategy, with supports only on the bottom edge and no tilt angle:

This printed out great and fits like a charm. Again, I’m pretty blown away at the dimensional accuracy of the resin: