Enclosure seal blunder | Arduino Modbus Project
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- เผยแพร่เมื่อ 21 ก.ย. 2024
- It appears that there was an issue (aka me designing it poorly) with the sealing of my enclosure when transitioning from a 2mm rubber ring to a 2.85mm 93A shore TPU material. To address this, I conducted tests using a small rig to determine the optimal settings required to ensure the enclosure can be securely closed with its lid. This adjustment was crucial in streamlining the enclosure design, allowing me to progress with developing other components for the project.
would be helpful if you shared the depth, width and curve specifics
Fair point. I should include it in the description really but will leave it in this reply as well.
The arc angle is 90 degrees.
The arc diameter is 80.
The width and the length of the groove is 3mm.
I am using the 2.85mm TPU to be the "seal" and to get it to fit into the groove I make sure that it is 2.1mm deep.
I am using 0.3 layer height for my prints.
Also making sure that the entire part is the right height so that everything gets sliced correctly. This enclosure in on purpose 32.1mm. The reason for this is that 32.1 can be divided by 0.3 which is 107. Also, when you subtract 2.1 from 32.1 it also divisible by 0.3 = 100. The part I have just printed is 51.3mm in height.
Definitely not 100% necessary, but might be interesting to look at some of the filament splicing prints out there to make a functional o-ring without a split. Very cool!
I think I am going a bit over the top but I am not sure of any other way that I can just DIY my way through. This is not meant to be perfect or industrial grade, obviously. Also, had a look at the splicing of filament and that looks like home brew welding haha. I am not sure if I need that for my TPU for now. I just make sure that I cut the ends and give it and extra mm so that if has to be forced pushed in so that it completes the loop nicely. Not perfect, but worked so far.
Injected enclosures are sold at hardware stores.
Yes, they do exist. However they are not tailored to my requirements + it is fun to design your own stuff and explore solutions.
First video I’m seeing of yours so not sure of the full context but have you considered looking at standards for conventional o-rings? Most o-ring suppliers have PDF guidelines on what the groove geometry should be for a given o-ring size(cross section diameter and inner diameter). If you find a supplier with an o-ring of similar hardness and size you should find pretty good groove dimensions in their guidelines. Might be interesting to compare them to your experimental findings.
Holy cow! Thanks! I was not aware that there are PDF guidelines for groove geometry from suppliers. I did some basic research for making my enclosures dust proof-ish and water proof-ish and I could not find the type of o-rings I was after. I was fully aware that some kind of industry has already figured it out and has all the standards in place but when you don't know exactly what you are looking for it can be hard to find. This is more of an exploration on what I can put together myself (even if it means that I am reinventing the wheel). I will have a deeper look at the topic at some point and as you said it could be interesting just to compare my findings to what the established industries are doing (and see how bad I am at it).
@@gebsystems haha it can be fun trying to re-invent the wheel. Gives you more of an appreciation for wheels lol. I’m no expert in this btw, just have been in a similar situation to you before. Try Hasco. They supply standard components for injection mould making, including o-rings. Product code for o-rings is Z98. They have decent guidelines. Also I’ve heard that you can buy a continuous o-ring and you cut it to the length you want and use a special glue to stick the ends together. Not sure who makes it and never used it myself but might be worth looking into for future projects. Best of luck!
@@theitalker Thanks mate! This is very useful and now I will definitely look into the O-ring product range from Hasco. And obviously I am in love with reinventing the wheel, who does not want that? I am just a dude who wants to make my Arduino Modbus project deployable and usable since I really do not enjoy the projects that are just a bunch of messy cables hanging around. Sure, the end result works but I can't put it to use since the wires can drop off and everything is vulnerable to the sneeze of a mosquito. And it does not matter to me that you are not an expert, who cares! You have knowledge that I am happy to use.