I see what you mean; sometimes it's easier to just deal with it than jump through the hoops. In my case they also gave me something like 10000 of their customer loyalty points, which I had absolutely no interest in using.
zipsglacier
joined 3 years ago
Yeah, the insurance guy said that, but I guess people find a way to still screw it up.
This happened to me a couple of years ago. I called the gas station and as soon as I described the issue the clerk said they knew about the problem and gave me the number direct to their insurance guy, who made sure all repair costs were covered. (Pumped the tank, flushed the system, and some other stuff I'm not a car guy.) It was a hassle, but as soon as the insurance was involved, it was smooth. I think they were trying to avoid a law suit.
What happened? Insurance guy said that the diesel truck driver had somehow put diesel in their unleaded tanks. I was dumbfounded. He said, yes, a person has to be both an idiot and a very determined one to make that mistake. Said the gas station tried to get all the diesel out, but of course couldn't. So there we were.
My point is: it might be worth a call to the station she filled up at.
Wow, this is even more amazing than I first thought
Hayabusa2 was launched on 3 December 2014 and rendezvoused in space with near-Earth asteroid 162173 Ryugu on 27 June 2018.[11] It surveyed the asteroid for a year and a half and took samples. It left the asteroid in November 2019 and returned the samples to Earth on 5 December 2020 UTC.
For each finite dimension n (1, or 2, or 3, etc...), the sphere in dimension n can't be contracted because of that empty n-dimensional space it surrounds. But that same sphere is the "equator" of the sphere in the next higher dimension, n+1. There, the n-dimensional equator can contract along one of the hemispheres, to a pole. But then that whole (n+1)-dimensional sphere still isn't contractible, because of the (n+1)-dimensional space it surrounds.
BUT the (n+1)-dimensional sphere can contract along one of the hemispheres in the (n+2)-dimensional sphere. And so on.
For any particular finite dimension n, there is an n-dimensional obstruction to contracting the sphere in that dimension. But if you go all the way to infinitely-many dimensions, there is no obstruction that ever stops contractibility of the infinite-dimensional sphere.
I've been experimenting with foldable 3d prints for tall thin walls in some game organizers. (Bigger pictures below.) The principle here is sort of similar to a living hinge, but not designed to flex too many times. Just fold once and be a reasonably stable structure.
Here are some individual pictures of the designs I've made, for corner support of some game organizers. Below, I have explanation and the design/dimensions that I use.
Overview
I haven't seen this type of design too often before, so I thought I would share what design and dimensions worked for me. Here is an overview:
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I design what I call the Wall as an outline, with some cutouts to reduce material. This is the part that prints flat and will fold up.
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I apply a chamfer to all edges, to help with removal from the build plate.
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I make a Y-Profile for the fold line grooves. The profile is vaguely Y-shaped, with a short rectangular base and an angled top. (Picture below; the Y-profile is labeled "cut out groove" there.)
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I use the Y-profile to cut away material from the wall to make those grooves.
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I print these in PLA (the pictures are matte PLA, because that's what I had). I guess PETG might be more sturdy, but honestly the PLA was so good that I haven't bothered with PETG.
Here is a picture, which I'll explain below.
Design Details
The top of this picture is an edge-on view of the wall (green horizontal lines) and the Y-shaped profile (labeled "cut out groove"). I use the following dimensions:
- wall thickness: 1.5mm
- wall chamfer (not pictured): .5mm
- Y-profile base height (a): 0.3mm
- thickness remaining below Y-profile (b): 0.4mm
- angle of Y-profile sides: 40 degrees from horizontal (45 didn't fold as well)
- Y-profile base width: (pi/2) x a x 1.1 (=.52mm with other dimensions above)
That last measurement, the width of the Y-profile base, is what the bottom part of the picture is about. The key idea is that width is going to be, roughly, 1/4 the circumference of a circle with radius a. So, I computed that amount, and multiplied by 1.1 to give 10% extra width.
With these dimensions, the part that folds is 0.4mm thick (dimension b in the pictures), then there is a 0.3mm clearance (dimension a), and the two arms of the "Y" fold together. In my first trials I used 45 degrees for the Y arms, but found that I got a better fold making them a little wider (so, lowering the angle from horizontal, to 40 degrees). This basically gives a little extra tolerance for variations in the physical print.
Conclusion
I hope this helps someone! I think it's a neat technique, and I'm a little surprised that I haven't seen it used anywhere else. I've seen various designs for living hinges, which are roughly the same principle, but designed to flex repeatedly. Searching around, I found one foldable cube on thingiverse. But otherwise I haven't found any models using this kind of design.
The plastic part inside this latch broke, and I wanted to print a replacement. I was genuinely surprised at how straightforward it was!! This is my first draft: it fit and worked fine! I made a second version with a few cutaways around the corners, and that was the final draft. (I forgot to take a picture of that one.)
There are lots of awkward overhangs, and I was having a hard time figuring out how it could be printed (a) in a good orientation for the stresses and (b) without supports. Then I remembered: we can just use supports!! I usually try to design so that they aren't needed, so I almost never use them. But wow they made this easy.
Yep, this is exactly why!