Elon Musk says ‘we dug our own grave’ with the Cybertruck as he warns Tesla faces enormous production challenges::Tesla CEO Elon Musk said Wednesday that the Cybertruck’s unique design means the company faces immense challenges in scaling production.
Gee… telling the engineers to getting precision to below 10 microns would cause production challenges.
I’ve been doing PCB-board design recently. Here’s the manufactuering specs: https://www.digikey.com/en/resources/dkred
So that’s 0.13mm tolerances to my printed-circuit board. Or 130 microns.
Current leading theory is that Elon Musk is such an ignorant dumbass that he doesn’t know the difference between mils and microns, despite running a car company / manufacturing firm. Give that a thought. Even then, 10-mils tolerance is near this PCB design, an object that’s only a few inches in size. Cars are much larger and normally should be built to much wider tolerances than a fucking PCB board.
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.
Ten mils is .010" or .25mm if I’m not crazy.
It’s a very standard tolerance for aircraft parts.
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.
I recently listened to a podcast about musk which was more on the anti side. The podcast had some parts about spacex and musks own work ethics, which told more of a story that he actually has some insights and knowledge and was a insane workoholic. Which shifted my perception of him. He isn’t dumb, he is a really good conman.
Lmao “if Lego and soda cans can do this, so can we.” At least he found materials similar to his existing vehicle build quality
Cool. Build 10 pieces and fit them together with sub 10 micron precision.
Ok, and once that’s done with the high level of repeatability and quality I’ve done it a thousand times, then what?
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.
There are micron-level precise instruments in the engineering world. They all come with temperature characteristics because thermal expansion is a bitch. 3D printers that literally heat up hundred degrees and cools down regularly literally can’t be this precise, the heat alone wrecks your precision.
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.
(by the way, my UV resin printer is quite temperature stable.)
The problem isn’t that it can’t be done. The problem is that it is unnecessary and very expensive.
https://www.creality3dofficial.com/products/ld-002r-lcd-resin-3d-printer
Don’t forget - it’s not as simple as just buying the printer. You need the right resin, several iterations of test models, and the right modifications of the model to work within the constraints of the printer and material.
With the right tuning, you will be able to create parts which measure within 1 micron tolerance reliably. (don’t forget to use an indicator and good reference blocks - you aren’t going to measure microns with a caliper or micrometer)
