cug
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- Guido
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- #316
BackgroundCurious if you are using a specific vendor for some of this stuff.
To get to these parts, I learned the bare minimum usage of Autodesk Fusion 360, it's free to use if you only have less than 10 active designs, which is easy for me. The ones that were done, were marked as "Read only" and I moved on.
Then, to get get them cut and bent, I used either OSHCut or Send Cut Send. These services have validaton tools looking at the uploaded designs and I went back and forth between my design and new uploads to address errors and warnings. At some point I ran out of patience when my design wasn't accepted for something their specification said was okay. Emailed OSHCut and they found a software error in their validation software and fixed it over a weekend - very impressive customer service.
So, in short, I learned the absolute basics of sheet metal design by reading, watching some tutorials, back and forth with online validation tools, and a little bit of knowledge about metal working I learned as part of an apprenticeship 35 years ago. Then had an online provider cut and bend the pieces.
I didn't go with powder coating directly from these vendors, because they were very expensive for this. It all started with the heater outside box and lid, that was the first thing I designed. Having it cut and bent and shipped was around $200. Powder coating would have brought it up to $360, since it would have included de-burring and cleaning the edges. The other reason was, that I knew there were some more holes to be drilled or things to be cut, as I didn't know the exact placement of all components just yet and could place some mounting holes due to restrictiions in the bending process (inadequate flange distance).
That's when I started looking for a local shop to do the powder coating once we had all the holes drills and other mistakes corrected. Found JIP Finishing here in Santa Clara, talked to them and they were super helpful.
I also talked to a local metal shop about cutting and bending some of the stuff based on my already existing design, and they ended up at more than double the price of the online vendor AND weren't particularly interested in some one-off stuff from a hobbyist.
Reasion for DIY
For the heater box, there just wasn't anything out there to use. And paying someone to develop it for me would have been prohibitively expensive. These are all small order fabrication, there is very little business to be made by doing it once and then being able to mass fabricate, since there basically isn't any demand for "mass production".
The door components were a different story:
We screwed ourselves by having the door flipped 180 degrees so that it opens to the other side. Jeremy (@813 Fabrication & Design) had offered to help with some components he already had, but they wouldn't have fit our flipped door. We have the new style door with extrusions and the extrusions are offset form the center as can be seen here:
This means that everything that is designed for these extrusions would have fit our door, but upside down. Of course that doesn't help much if you're talking, for example, about a fold down table (GP Factor) or mounting for a Redvision display ... they just wouldn't be very useful this way ...
That's why all the door components we made were custom for our use case. We plain had to if we wanted these things.
Webasto Heater Bracket
For the heater inside stuff: that's just an artifact of how we mounted the heater. While we thought about how thin the metal in that area is, we still went ahead mounting it there and THEN came up with a solution to stabilize it. So, one DIY "mistake" leading to the neccessity of solving a problem, which we did with the easiest DIY solution we could come up with.
Conclusion and TLDR
If you start with a complete DIY solution, forget about easily incorporating existing solutions - either they won't fit the idea, or the implementation. We were able to use a few things, but in the end, this turned out to be suboptimal as well and it would have been not only cheaper, but also much better if we had also done it ourselves.
If you want to use existing solutions, just pick one, stick to it, use stuff that is designed for it or known to work with it and don't think about customization. They only lead down a rabbit hole.
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