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NorthernWidget-Skunkworks / Project-Walrus

TP-DownHole on a one-sided board for easier production and encapsulation
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Housing dimensions #7

Closed awickert closed 3 years ago

awickert commented 4 years ago

From @superchap123 via email:

"I want to keep the potted sensor narrow enough to fit through an M16 nut but if we want the potting compound to seal the sides of the FR4, that will be rather tricky. Do we care about the potting material sealing up the sides of the FR4? We can pot the top/bottom and that should be enough to keep water away from the edges as long as 3D print stays watertight. If we want full-encapsulation it would be nice if the sensor width was reduced slightly but I suppose the board design is fixed for now correct? I have alternative ideas to nicely mate a housing to the connector with this sensor that we can use."

awickert commented 4 years ago

Short version: Make it fit an M20 instead and/or look into Bobby's simpler design?

It looks like you're thinking of a much more sophisticated encapsulation than what @bschulz1701 designed here! https://github.com/NorthernWidget-Skunkworks/Project-Walrus/tree/master/3Dprint/HousingLargePTH

The Walrus board might be able to be made a bit narrower, but is about as narrow as can reasonably be managed. We could probably try to make it longer/skinnier, which would require a redesign and may require a 4-layer board. I don't think that we currently have the engineer-power to do that.

I am not sure of the waterproofing characteristics of the FR4. I wouldn't count on the 3D print alone staying watertight.

Unlike the TP-DownHole, this wasn't designed to be tiny. Maybe we could aim for an M20 nut instead?

awickert commented 3 years ago

Instead of redesigning the board, @superchap123 built a plastic-flex nut grabber. This is a successful alternative solution (15a6ea1ceea464b84c4a1b21669ceb5cb8cb5855).