Comment on Elon Musk says 'we dug our own grave' with the Cybertruck as he warns Tesla faces enormous production challenges

Rentlar@lemmy.ca ⁨11⁩ ⁨months⁩ ago

• dragontamer@lemmy.world ⁨11⁩ ⁨months⁩ ago

  I’ve been doing PCB-board design recently. Here’s the manufactuering specs: www.digikey.com/en/resources/dkred

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  So that’s 0.13mm tolerances to my printed-circuit board. Or 130 microns.

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  • Rentlar@lemmy.ca ⁨11⁩ ⁨months⁩ ago

    If he said <10 mils, I’d might have bought the explanation that Elon actually meant millimetres. Micron is a very specific metric-based unit which to Elon might have been trying to use like a buzzword.

    The moral of the story is don’t say stupid engineering stuff if you don’t want engineers to laugh at you.

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    • macrocephalic@lemmy.world ⁨11⁩ ⁨months⁩ ago

      And 10 microns at what temperature? Because on something the size of a car, made of mixed materials, thermal expansion of less than a degree is going to blow that figure.

      They couldn’t apply paint to a tolerance of 10microns.

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    • PsychedSy@sh.itjust.works ⁨11⁩ ⁨months⁩ ago

      Ten mils is .010" or .25mm if I’m not crazy.

      It’s a very standard tolerance for aircraft parts.

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      • Rentlar@lemmy.ca ⁨11⁩ ⁨months⁩ ago

        Yeah and that wouldn’t be too bad either… still expensive but not completely unrealistic for ALL parts of a car.

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  • Red_October@lemmy.world ⁨11⁩ ⁨months⁩ ago

    It’s almost like Elon Musk is a complete fucking moron and not an Engineer. The wanker has never actually designed a thing in his life. He just tells other people to design something, or buys an existing company, then struts around like he thinks he’s the smartest thing around.

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    • phoenixz@lemmy.ca ⁨11⁩ ⁨months⁩ ago

      He was fired for being incompetent. Only got rich because rich daddy and because he got lucky with stocks

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• kautau@lemmy.world ⁨11⁩ ⁨months⁩ ago

  Lmao “if Lego and soda cans can do this, so can we.” At least he found materials similar to his existing vehicle build quality

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  • plantedworld@lemmy.world ⁨11⁩ ⁨months⁩ ago

    Hey, don’t disrespect Lego like that

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• piecat@lemmy.world ⁨11⁩ ⁨months⁩ ago

  “At this point I think I know more about manufacturing than anyone currently alive on Earth.”

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• tdawg@lemmy.world ⁨11⁩ ⁨months⁩ ago

  What an idiot

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• gregorum@lemm.ee ⁨11⁩ ⁨months⁩ ago

  Flashbacks to Steve Jobs and the NeXT Cube.

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• FakinUpCountryDegen@lemmy.world ⁨11⁩ ⁨months⁩ ago

  I have what are basically toy 3d printers capable of 1 micron precision…

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  • nomecks@lemmy.world ⁨11⁩ ⁨months⁩ ago

    Cool. Build 10 pieces and fit them together with sub 10 micron precision.

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  • dragontamer@lemmy.world ⁨11⁩ ⁨months⁩ ago

    Bullshit.

    The thermal coefficient of expansion of say… Aluminum is 23.

    That means that when a 1 meter piece of Aluminum rises from 20C to 21C, just one degree Celsius, it grows by 23 microns.

    Your 3D printer is not a temperature controlled precision instrument. Your tolerances are no where close to 10 microns let alone 1 micron.

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    • FakinUpCountryDegen@lemmy.world ⁨11⁩ ⁨months⁩ ago

      Bullshit.

      You’re changing the premise of the question.

      Pick a temperature - design your model to be whatever you need it to be at that target temperature - just like every other engineer with 26 years of experience, such as myself.

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  • emergencyfood@sh.itjust.works ⁨11⁩ ⁨months⁩ ago

    The problem isn’t that it can’t be done. The problem is that it is unnecessary and very expensive.

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    • FakinUpCountryDegen@lemmy.world ⁨11⁩ ⁨months⁩ ago

      This is definitely true in terms of industrial production. (super cheap for “makers” - taking the hardware constraints into consideration with the design, of course).

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