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#102
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Towards the *fully* 3D-printed electric cars.
On Sun, 09 Jul 2017 21:55:19 -0600, Greg Goss wrote:
wrote: Composites are widely used all over the place. Many of them the Chimp probably thinks of as 'traditional materials'. Both concrete and mortar are composite materials and we've been using that stuff since the Romans. Composites of various types are used all over the place, from piping to appliances to aircraft to construction materials. Oh, good grief. I suppose you're going to tell me that a concrete pump is a 3-D printer, too. Hook it to the right controller and it is. I saw a youtube of someone printing a kid's playcastle using a concrete pump device of some kind. https://www.youtube.com/watch?v=DQ5Elbvvr1M Don't be an idiot. The thread is clearly about modern marvels, like carbon fiber, not concrete. Geez, people turn intentionally stupid when they run out of ideas (like leftists). |
#103
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Towards the *fully* 3D-printed electric cars.
On Mon, 10 Jul 2017 05:08:51 -0000, wrote:
In sci.physics Greg Goss wrote: wrote: Marketing types certainly do. Consumers have always bought toasters based on their looks. After all, the thousands of different designs all do the same thing. And all look about the same. Not so much: https://www.pinterest.com/pin/437412182539227477/ For any given era they look pretty much the same to me. https://www.google.com/search?q=toas...w=1327&bih=868 You'd argue that every color is the same? No, but most are chrome. I haven't bought a chrome one in a long time. These days they all have an outer plastic layer. The only chrome you see is less than an inch around the slots/ In the link I gave above, most of the toasters shown are in fact chrome. From 3/4 of a century ago, sure. Styles change and that's exactly the point. The statement being refuted is that all toasters "look pretty much the same", which is simply BS. most adjective 1 greatest in quantity, extent, or degree1 greatest in quantity, extent, or degree 2 the majority of |
#104
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Towards the *fully* 3D-printed electric cars.
On Sun, 09 Jul 2017 22:15:53 -0600, Greg Goss wrote:
"Robert Clark" wrote: I was estimating that size of the engine based on cited high horsepower for the Tesla cars. But I was surprised the mass and volume required for the Tesla electric motor is much smaller than a comparable gasoline engine. This video makes a comparison of a Tesla electric motor to a typical gas engine. The power to weight ratio is 10 times better for the Tesla electric motor(!) I haven't been following the Tesla and similar modern electric cars. I seem to recall that twenty years ago, they were predicting that the big advantage of electric cars would be motors IN the wheels and no transmission at all. Did anyone ever go that route? Unsprung weight is not a good thing. (My Ford hybrid has two electric motors and the gas engine. I am having trouble finding a good overview of the transmission, but it seems to be based on a differential concept.) |
#105
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Towards the *fully* 3D-printed electric cars.
On 7/10/2017 11:31 AM, wrote:
On Sun, 09 Jul 2017 21:55:19 -0600, Greg Goss wrote: wrote: Composites are widely used all over the place. Many of them the Chimp probably thinks of as 'traditional materials'. Both concrete and mortar are composite materials and we've been using that stuff since the Romans. Composites of various types are used all over the place, from piping to appliances to aircraft to construction materials. Oh, good grief. I suppose you're going to tell me that a concrete pump is a 3-D printer, too. Hook it to the right controller and it is. I saw a youtube of someone printing a kid's playcastle using a concrete pump device of some kind. https://www.youtube.com/watch?v=DQ5Elbvvr1M Don't be an idiot. The thread is clearly about modern marvels, like carbon fiber, not concrete. Geez, people turn intentionally stupid when they run out of ideas (like leftists). whoa! "print" a garden using dirt ! "Print" a wood framed House ! "Print" sand castles at the beach !! "Print" new teeth in place, (dentists) "Print" new shoes onto your feet !!! (leftist will run with that, also CNN) |
#106
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Towards the *fully* 3D-printed electric cars.
In sci.physics wrote:
On Mon, 10 Jul 2017 05:08:51 -0000, wrote: In sci.physics Greg Goss wrote: wrote: Marketing types certainly do. Consumers have always bought toasters based on their looks. After all, the thousands of different designs all do the same thing. And all look about the same. Not so much: https://www.pinterest.com/pin/437412182539227477/ For any given era they look pretty much the same to me. https://www.google.com/search?q=toas...w=1327&bih=868 You'd argue that every color is the same? No, but most are chrome. I haven't bought a chrome one in a long time. These days they all have an outer plastic layer. The only chrome you see is less than an inch around the slots/ In the link I gave above, most of the toasters shown are in fact chrome. From 3/4 of a century ago, sure. Styles change and that's exactly the point. The statement being refuted is that all toasters "look pretty much the same", which is simply BS. https://www.walmart.com/search/?quer...&typeahead=toa What is currently on sale at Walmart, the majority of which are chrome or stainless steel and are roughly a cubical box with 2 or 4 slots in the top. -- Jim Pennino |
#107
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Towards the *fully* 3D-printed electric cars.
wrote:
On Sun, 09 Jul 2017 21:55:19 -0600, Greg Goss wrote: wrote: Composites are widely used all over the place. Many of them the Chimp probably thinks of as 'traditional materials'. Both concrete and mortar are composite materials and we've been using that stuff since the Romans. Composites of various types are used all over the place, from piping to appliances to aircraft to construction materials. Oh, good grief. I suppose you're going to tell me that a concrete pump is a 3-D printer, too. Hook it to the right controller and it is. I saw a youtube of someone printing a kid's playcastle using a concrete pump device of some kind. https://www.youtube.com/watch?v=DQ5Elbvvr1M Don't be an idiot. The thread is clearly about modern marvels, like carbon fiber, not concrete. Geez, people turn intentionally stupid when they run out of ideas (like leftists). The word being used is 'composites'. Unlike you, I don't try to read peoples' minds to discover that they don't really mean 'composites' at all. I take them at their word and assume that if they mean 'carbon fiber' they will say that rather than 'composites'. -- "Ordinarily he is insane. But he has lucid moments when he is only stupid." -- Heinrich Heine |
#108
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Towards the *fully* 3D-printed electric cars.
wrote:
In sci.physics wrote: On Mon, 10 Jul 2017 05:08:51 -0000, wrote: In sci.physics Greg Goss wrote: wrote: Marketing types certainly do. Consumers have always bought toasters based on their looks. After all, the thousands of different designs all do the same thing. And all look about the same. Not so much: https://www.pinterest.com/pin/437412182539227477/ For any given era they look pretty much the same to me. https://www.google.com/search?q=toas...w=1327&bih=868 You'd argue that every color is the same? No, but most are chrome. I haven't bought a chrome one in a long time. These days they all have an outer plastic layer. The only chrome you see is less than an inch around the slots/ In the link I gave above, most of the toasters shown are in fact chrome. From 3/4 of a century ago, sure. Styles change and that's exactly the point. The statement being refuted is that all toasters "look pretty much the same", which is simply BS. https://www.walmart.com/search/?quer...&typeahead=toa What is currently on sale at Walmart, the majority of which are chrome or stainless steel and are roughly a cubical box with 2 or 4 slots in the top. You might want to redo your count. I see a lot more black than chrome (and don't confuse stainless steel with chrome, either). -- "False words are not only evil in themselves, but they infect the soul with evil." -- Socrates |
#109
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Towards the *fully* 3D-printed electric cars.
On 7/10/2017 9:32 AM, Edward Prochak wrote:
On Saturday, July 8, 2017 at 9:04:04 PM UTC-4, Lofty Goat wrote: On Fri, 7 Jul 2017 08:00:04 -0700 (PDT), Edward Prochak wrote: ... electric motors are much more complex than combustion motors.... What measure of complexity are you using? -- Goat This is in the context of 3-d printing. The mixture of materials makes electric motors much more complex than combustion engines. combustion engines are all metal. electric motors have metal and insulating material. That's the measure. ed you have low temp melting materials, adjacent to high temp melting materials. How do you print an insulated length of round wire from a normal direction to its axis ? assume copper and teflon. --- Ceramics have been used as insulators from the early days of electricity: https://en.wikipedia.org/wiki/Ceramic_capacitor#History Many ceramics also have high temperature resistance. The most important reason plastic is used for wire insulation is that wire commonly has to be bent to different directions. However, that wouldn't be required for the wire deposited in place. For deposition of insulated wire at right angles to the wire axis, when deposited in horizontal slices, it would have the appearance of insulation, then wire, insulation, then insulation, then wire, etc. Bob Clark ---------------------------------------------------------------------------------------------------------------------------------- Finally, nanotechnology can now fulfill its potential to revolutionize 21st-century technology, from the space elevator, to private, orbital launchers, to 'flying cars'. This crowdfunding campaign is to prove it: Nanotech: from air to space. https://www.indiegogo.com/projects/n...ce/x/13319568/ ---------------------------------------------------------------------------------------------------------------------------------- -- |
#110
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Towards the *fully* 3D-printed electric cars.
Desktop Metal reveals how its 3D printers rapidly churn out metal objects. Posted Apr 25, 2017 by Lora Kolodny (@lorakolodny) https://techcrunch.com/2017/04/25/de...metal-objects/ The metal "binder jetting method" for 3D metal printing is analogous to how amateurs make plastic 3D parts so it should be something amateurs could copy: Desktop Metal Production System. https://www.youtube.com/watch?v=aUOCiRktuCo The only complication is that it is a 3 step process: the part is 3D printed, then put in a solvent bath to dissolve the binder, then finally put in a high temperature oven to sinter the metal together. ... Desktop Metal says their method for metal 3D-printing is superior to the the laser sintering for volume production of metal parts because of the laser methods slow rate of deposition. DM claims 100 times faster production rates than the laser method. But since this high production rate comes from using many more print heads, it seems to me you could get the faster deposition rate with the laser method by using, say, 100 copies of the lasers. Laser 3D metal printing commonly uses a 200W laser. So to scale this up 100 times would require 20,000W. The cheapest cost I've seen for lasers were by manufacturers in China in the $15 per watt range. So 20,000W would cost in the range of $300,000. Most likely the lasers would be the primary cost for the machines, so call it ca. $600,000 for the full machine able to duplicate the Desktop Metal production rate. One laser 3D metal printing company also suggests use of wirefeed rather than a powder bed can increase the production rate and also reduces the cost of the material: VIDEO: Is Wirefeed the Future of Selective Laser Sintering? James Anderton posted on December 19, 2016 | http://www.engineering.com/AdvancedM...Sintering.aspx Near the end of this video they also suggest scaling the laser up to the 15,000W range could bring the production rate to the level of other commonly used metal production methods. Bob Clark ---------------------------------------------------------------------------------------------------------------------------------- Finally, nanotechnology can now fulfill its potential to revolutionize 21st-century technology, from the space elevator, to private, orbital launchers, to 'flying cars'. This crowdfunding campaign is to prove it: Nanotech: from air to space. https://www.indiegogo.com/projects/n...ce/x/13319568/ ---------------------------------------------------------------------------------------------------------------------------------- -- |
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