It doesn’t have to be a large cavity in order to be useful. Imagine being able to reliably fill a hole that’s 5mm deep. Not amazing, but that could mean 25 layers. That’s 24 layers more than what we can fuse together now.
I added a SAT solver to refine the tube endpoints so that nearby tubes don't start or end on the same layers. Even the default greedy solver (CP-SAT is SLOW) does a pretty good job at "staggering" the tube ends.
The part is "knitted" together in 3D at different Z layers.
Try the binaries. They've only been tested in Linux but they build fine for all platforms.
Slice something with MAGMA infill turned on and flip off the visibility of everything but injection lines. You'll see how the U shaped tubes knit the part together
I did some basic calculations on isotropic heat loss in a circular tube. I don't have the knowledge to model it in detail but I don't think this is correct.
You can set tube height to something tiny like 5mm. It takes a fraction of a second to fill that.
As someone who's printed a lot, on fast printers you have to set a minimum layer time because it takes up to 20 seconds for the layer below to solidify, cool to below the glass transition. Plastic is a bad conductor so heat loss through the walls probably isn't as bad as you'd think
I own a 3D pen and I use it to repair and tweak prints. Sometimes I use it to fill small cavities with material. The surrounding area usually doesn’t enjoy the heat, but PLA definitely can be injected to a degree. Maybe not to fill thin channels in the infill, but to fill a few strategically placed and shaped voids, yes.
> z-direction does not need to be more stable than the other directions so there is no need for long continuous strands anyway
I’m not sure I understand. In FDM printing, Z is the only direction where you currently CANNOT have long continuous strands, even if you need them. You always need to sacrifice one direction in which the part is going to suck.
For example, you can easily print an airplane wing with a beautiful, perfectly smooth and continuous airfoil, but you have to include a channel for something like a carbon fiber rod. Without it, the slightest bending force would instantly split the layers apart. Any other orientation will give you a rough surface with steps and a disgusting amount of supports. Being able to add a few strategically placed “columns” (i.e. members in the spanwise direction) could really help this particular usecase.
Adding a long strand of Filament in z direction is what the Author of this article tried. By injecting molten filament into a long channel in the infill.
What i meant that the z-direction does not need to be MORE stable than the other directions.
Adding a long strand of filament in the z-direction in the infill (close to the geometric center of the print) might make the print more resistant to stretching but not necessarily bending.
Carbon rods don't bend but filament does. The wing would break apart at the seams event if it had channels of filament along side its z-axis. It would still be more stable, but not as much as one might think.
Walls give a print most of its strength by a huge margin. And interlocking the walls in z-direction would have a proprietorially larger impact.
I consider myself kind of sensitive to being forced to do stuff, but Ryanair just doesn't seem that bad. Of course, you get a million offers for things you probably don't need, but I genuinely don't feel like they're trying to scam me. It's like ad-supported Spotify or something. Annoying, but not actively trying to vacuum up my credit card.
Yeah. I fly budget and mid tier all the time, they’re all the same trying to upsell a bazillion services. Just click no/decline/reject all the way, what’s so difficult about it?
Do we have any numbers for this? Are those people “falling” for it or are they just choosing to buy the upgrades? I’ve paid for good (window!) seats on Ryanair flights, I’ve paid for luggage, I’ve bought a snack from the trolley. It would make sense to me that other people might be paying for other services.
I have a Chinese EV too, an MG4 built by SAIC. It’s a really cheap car, significantly cheaper than its non-Chinese counterparts like the VW ID.3 or (roughly) a Hyundai Kona.
The factory rust protection was maybe a bit on the lighter side, but everything else on it looks completely normal. The drivetrain is simple (no heat exchange mechanism between battery coolant and motor coolant, a slightly whiny motor), but also genuinely competent and modern for a 2022 design (a mature skateboard RWD platform with a thin CTP battery with large cells and generous cell/coolant heat exchange). There are no obvious wtf solutions, nothing that would look too thin or too flimsy. The infotainment and the SW of the car does have the occasional funny moments, but all that is happening on what looks and feels like a solid piece of hardware.
The point is that you can't tell anymore just by looking underneath and counting the wtfs.
I have a friend who's a big Honda fan, amateur racer, a true "petrolhead" but with an intact brain. Runs his own shop. Naturally there was a barrage of jokes when I rolled up in my new Chinese EV, but then we put it up on a lift and there wasn't really much to joke about. The platform looks boring and mature. Things are where you'd expect them, they're the right size and shape, you can tell why they're there.
Obviously, the motor/reducer bearings in my car may fail in a few years (like in the Kona Electric or Škoda Enyaq) or the charging circuitry may fail (like the ICCU in the Ioniq 5) but then we're already comparing it against legacy manufacturers, and that's a pretty good position to be in.
From what I've seen of youtube teardowns by mechanics, Chinese cars often have the air of modernity and future tech about them, but under the hood, they like to use technical solutions that were abandoned by European manufacturers a decade ago or more, leading to the cars not being competitive in driving dynamics to what you would get from an euro manufacturer for perhaps slightly more money.
European cars are incredibly expensive these days and have been for a while compared to imports.
About 7 years ago I was looking for a new car and had only owned and drove VW cars. Naturally, I looked at VW, the Golf in particular. With all the bells and whistles, it came to about 35k EUR. A Civic was about 11K cheaper. Guess what I bought?
There was nothing in the Golf that could justify the extra cost. Nowadays is the same.
More fun driving dynamics aren't worth the extra twenty thousand dollars you need to buy the equivalent European car, let alone the ridiculous lifetime costs of ownership, such as maintenance.
I mean, seriously. I can buy a shitty Argentine-made base model used 5-year-old VW Amarok with 70K km on it for the same price as a brand new Chinese-made Changan Hunter (whether gas or REEV). The second one is also going to be far, far cheaper to fuel (if you choose the REEV), maintain and repair.
Let's not even talk EVs. Europeans exited the market before it even began. European brands only start to show up at around what, the 70-100K dollar bracket? Sure, the Porsche Taycan is cool and all, but I've never seen one. Meanwhile, BYDs, Deepals, MGs, and a million other random brands are only growing more and more common with each passing day.
> Let's not even talk EVs. Europeans exited the market before it even began. European brands only start to show up at around what, the 70-100K dollar bracket?
The ID.3 starts at like 35k USD here in Europe. Škoda Elroq and Enyaq, both under 50k USD.
>Sadly that's also why it's hard to buy a new car, you only know what's a quality car years down the line.
Not always. Sometimes the components are a lot older than the car and have earned a bit of a reputation. The powerplant in my car is like 20 years older than the model year. The underlying platform is nearly as old as well. All proven to be boringly reliable.
I guess this changes in the EV era with faster rate of iterations compared to the ICE era. More lessons still to learn with the EV cars I'm sure. Meanwhile a 4 cyl compact car is practically a commodity and aside from safety widgets like backup cameras, have been relatively unchanged for 15 or 20 years.
I think it depends on the car. I've seen VW products fall apart in months after sale, we actually had a Mk5 golf that went back to the dealer three times in it's first year for fuel system faults.
There are a lot of low price bracket Chinese imports (MGs mainly) that seem to have severe rust issues that are present at delivery.
And Toyotas a few years ago had a problem where certain colour cars would have their paint fall off in huge sheets as the primer was incorrect or something.
I do agree in principle that most modern cars should be pretty good for their warranty period/first owner, but I've also seen some egregious edge cases!
A few years back my wife had a Toyota that had serious electrical problems (all instruments would stop working) that was eventually traced to a faulty sunroof combined with a terrible design...
What will you do when you want something different? Used car values are partially a function of their expected remaining lifespan, and if the car isn't trusted to last it is worth less.
I had AEG Lavamat 1055 about 35 years (from 1982), worked well without hitch. It was quite small, top loading model etc. Fast spin-dry w/ variomatic (shaking also while spinning). Laundry out of it was quite dry already.
Then 2017 building plumbing had to be redone and gave reason to remake bathroom completely and replacing old equipment. I would have bought Miele model but it didn't fit reserved place and I ended up buying Electrolux instead.
That's now month short of 9 years and I have no reason to believe it will not work well at least another 10 years to come. regardless advertised 10 years warranty.
This current one has more electronic parts, but now searching by its model found only fault codes all seem to be user errors, overfilling, water hose not open, draining filter clogged etc. All non issues whoever bothers knowing how to maintain and operate that thing over years. No complaints about issues with electronics problems.
These were first used by a couple and later single (me) needs which are usually once a week plus twice a month washing 4-5 uses single day. Which becomes bit over 100 washing in year.
That's just 1000 washings in 10 years and 3500 in 35 years. For a family washing every day once it would be 3563 uses in 10 years.
If washing machine isn't badly kept against instructions and it isn't cheapest knock off plastic rubish, why would be a surprise if it doesn't last at least that 10 years use washing family laundry. And last many decades with single or dink use?
Be thankful you didn't buy Beko. I had a horrible uphill battle trying to get them to honour a 2 year warranty in Ireland after about a years usage.
After they finally engaged with the warranty, they had someone come out to 'fix' it once every couple weeks until I gave up and just bought a different brand washer/dryer.
I'm now sworn off Beko, and will happily tell everyone I can about my terrible service :)
That's also a bit 'you get what you pay for'? Especially with large electronics/cars typically it pays off to go for the more expensive ones. Miele here as well and well past a decade
Yes. But. There's many companies that build up a reputation then cash in on that reputation. Eg Mercedes in the 90s. So you could end up paying more for cheap rubbish.
It would be nice if the EU or someone introduced an energy star type system for reliability and repairability so that consumers could have some kind of idea what the quality is likely to be.
Miele makes darn reliable appliances, I've had two Miele vacuum cleaners from -88 and still both work fine. Used weekly, one at home and when I sold summer cottage to my brother & his wife I gave one to them, they still use it there.
All parts still available and when I bought new hose few years ago from service I asked if they still are willing to fix it if it went broke answer was. Sure absolutely, just bring it here and we make it work again. I've just bought once new floor nozzle that was worn out and that hose because it grew leaky from ends. Third party dust bags are available and very cheap.
Not anymore. I bought a brand-spanking new high-end Electrolux dishwasher and discovered it had a flimsier construction than the 20 year old one my mom has at home, that was an absolute bargain bin purchase.
Maybe it’s me then. We just don’t get that long out of them. We have tried Fisher and Paykel and Samsung. Never had more than and year warranty either.
They do run at least once a day often more, but that’s not enough to explain it.
I understand that while small kids or baby then there is lot of laundry. But I've heard some people wash same fav clothes every day just to be able to use them fresh clean every day.
Gosh, but there are other ways to solve that issue like having bit more of fav clothes, so that you dont' have to wash same cloth every day but instead was a bunch of them end of week. Need white shirt every day at work, buy at least 10 of them, use one each day, wash & iron weekend, put on pile1 and use from pile2 next week rotating for even use and to have some redundancy, then pile1 week and so on. Get more trousers etc. whatever you need. This is what I did when had job where dress code told what to wear in office.
And kids, buy them more fav clothes too if it otherwise becomes fight what they want to wear daily.
But each to their own. Above is just my view and how I learned when I was kid looking my parents, and how I've done also.
I'd be disappointed if it didn't. My Bosch is running for about 13 years right now and just as well as when I bought it.
Maybe it helps I'm in the EU and there's a law stating you have right of compensation if it dies within a decade...
VW ID.3 is designed by a Chinese team in China, built in Shanghai backed entirely by the Chinese ecosystem.
You need to be totally blind to consider vw being able to design & produce such a car on its own. let's be straight - the software in the car is not something Germany can build on its own. That 20 years gap won't be filled overnight.
This is false, the ID.3 was designed primarily in Germany but they sell a model customised to the Chinese market. They're two different cars from different production facilities.
All the control modules for the German model at least are manufactured by Bosch and Valeo in France and Germany - where the software is also produced.
As an aside, Bosch produces control modules and the underlying software for just about every western car manufacturer. 80%+ cars sold worldwide use their traction control system for example so I'm not sure where this so-called gap is.
The kind of software needed in a car (minimal or ideally none at all except for DME and CarPlay display) is indeed not something that Germans were able to build on their own in the recent times.
Not according to what I've just read. It's sold in china via a joint venture with saic and seems to have been slightly redesigned for the china market.
What the hell are you talking about? Why are you lying?
ID.3 is a MEB car, its production started in Zwickau (Germany) in November 2019, two years before it even arrived to China, and one year before the SOP of ANY MEB car (ID.4 was the first one) in Anting (Shanghai).
I viscerally hate people who do or seriously suggest this. First, ignoring any strange noise in a car almost always leads to more expensive and stressful repairs down the road. Second, how the hell do people hear a noise and are simply okay with not knowing the source? Not understanding the situation and not being able to make any kind of informed decision?
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