CyberGus

Well-known member
First Name
Gus
Joined
May 22, 2021
Threads
72
Messages
6,340
Reaction score
20,636
Location
Austin, TX
Website
www.timeanddate.com
Vehicles
1981 DeLorean, 2024 Cybertruck
Occupation
IT Specialist
Country flag
We should all show up with our measuring devices :)
When you drive a Cybertruck, you don't need to measure ™
Sponsored

 

FutureBoy

Well-known member
First Name
Reginald
Joined
Oct 1, 2020
Threads
209
Messages
3,526
Reaction score
6,019
Location
Kirkland WA USA
Vehicles
Toyota Sienna
Occupation
Financial Advisor
Country flag
We should all show up with our measuring devices :)
Hmmmm.... So I need to show up with a dozen chickens or more, lots of clear tape, feed for the chickens, a chicken coop, extra feed and water... And now digital calipers.

I'm going to need a truck to get this all moved around. But I'm not going to have the truck till after I pick up my CT.

Would someone like to start a mobile measuring business so that I can get all the measurements before signing the final CT pickup documents? That would be way more efficient than each of us having to get a trade-in truck to get all the measuring infrastructure to the CT pickup spot.
 

PilotPete

Well-known member
First Name
Pete
Joined
May 8, 2023
Threads
12
Messages
1,577
Reaction score
3,952
Vehicles
Porsche, BMW, M3LR on order
Occupation
Chief Pilot
Country flag
Hmmmm.... So I need to show up with a dozen chickens or more, lots of clear tape, feed for the chickens, a chicken coop,
Do you know why a chicken coop has 2 doors?










Because if it had 4, it would be a chicken SEDAN!
 

FutureBoy

Well-known member
First Name
Reginald
Joined
Oct 1, 2020
Threads
209
Messages
3,526
Reaction score
6,019
Location
Kirkland WA USA
Vehicles
Toyota Sienna
Occupation
Financial Advisor
Country flag
Am I the only one who default reads "coop" as co-op like cooperative? Then I see the chicken reference and think those chickens are mighty ambitious.
 


Coolbreeze704

Well-known member
First Name
Bruce
Joined
Nov 23, 2019
Threads
15
Messages
1,412
Reaction score
3,762
Location
Troutman,NC
Vehicles
2022 Model Y, 23 Lightning, CyberTruck (someday)
Occupation
GM Manufactured Homes
Country flag

fritter63

Well-known member
First Name
Mark
Joined
Jan 21, 2020
Threads
33
Messages
1,444
Reaction score
2,927
Location
Atascadero
Vehicles
2018 Model 3 LR, 2019 Model 3 SR+
Occupation
Retired Software Engineer, Woodworker and guitar builder extraordinaire
Country flag
When you drive a Cybertruck, you don't need to measure ™
Officially changing what I'll write on the tailgate (in grease pencil):

- 0-60 in 2.9 sec
- 500 miles range
- 14,500 towing
- 9.003" d**k

:cool:
 

hridge2020

Well-known member
First Name
Henry
Joined
Dec 4, 2019
Threads
183
Messages
967
Reaction score
1,775
Location
Central Coast CA
Vehicles
Tesla
Occupation
Aircraft Fixed/Rotary - Rocket/Missile/Spacecraft/Air Defense Scientist
Country flag
Internal email from Elon Musk on Cybertruck.

Due to the nature of Cybertruck, which is made of bright metal with mostly straight edges, any dimensional variation shows up like a sore thumb.
All parts for this vehicle, whether internal or from suppliers, need to be designed and built to sub 10 micron accuracy.
That means all part dimensions need to be to the third decimal place in millimeters and tolerances need be specified in single digit microns. If LEGO and soda cans, which are very low cost, can do this, so can we.
Precision predicates perfectionism.
Elon


Screenshot:

cybertruck precision build quality.jpg

Uhmmm, I rather hear build the Cybertruck to the quality, and tolerances of the Starship or Spacex rockets than refer to Lego and soda cans.
 

cvalue13

Well-known member
Joined
Aug 17, 2022
Threads
74
Messages
7,147
Reaction score
13,759
Location
Austin, TX
Vehicles
F150L
Occupation
Fun-employed
Country flag
Uhmmm, I rather hear build the Cybertruck to the quality, and tolerances of the Starship or Spacex rockets than refer to Lego and soda cans.
id be satisfied with him just using meaningful measurement units that aren’t nonsensical

but Musk is often imprecise or confused in his choices of terms
 


cvalue13

Well-known member
Joined
Aug 17, 2022
Threads
74
Messages
7,147
Reaction score
13,759
Location
Austin, TX
Vehicles
F150L
Occupation
Fun-employed
Country flag
If all of the CTs parts were either soda cans or legos this would be an easy command to obey.
@wtibbit you're famous!

" Or, as one of the Cybertruck Owner Club’s forum participants, quipped in response to Musk’s email: “If all of the CTs parts were either soda cans or legos this would be an easy command to obey.”


Tesla's Cybertruck has a serious problem that only a complete redesign (fastcompany.com)

not a recommended read, outside of the shout-out for @wtibbit
 

CyberGus

Well-known member
First Name
Gus
Joined
May 22, 2021
Threads
72
Messages
6,340
Reaction score
20,636
Location
Austin, TX
Website
www.timeanddate.com
Vehicles
1981 DeLorean, 2024 Cybertruck
Occupation
IT Specialist
Country flag
@wtibbit you're famous!

" Or, as one of the Cybertruck Owner Club’s forum participants, quipped in response to Musk’s email: “If all of the CTs parts were either soda cans or legos this would be an easy command to obey.”


Tesla's Cybertruck has a serious problem that only a complete redesign (fastcompany.com)

not a recommended read, outside of the shout-out for @wtibbit

If the press quotes any of my ramblings here, it was taken out of context, I swear
 

uff_da

Well-known member
Joined
Aug 31, 2021
Threads
3
Messages
148
Reaction score
376
Location
North Dakota
Vehicles
Model Y
Country flag
Some visual aids to put this in perspective.

10 microns ~ .004" (yes, I'm rounding up, hope I did the math right... my RPN calculator won't even convert to microns).

That is smaller than the smallest bits (.005") I use on the CNC for doing shell inlay on my guitars. See picture below. They are so small, I can only cut at .005" depth per pass. And they are sold in packages of 10 for a reason......

Also shown are my digital calipers set to .004". You pretty much can't see the gap unless you hold it up to the light.

You're certainly not going to notice any panel gaps at that difference.

But thinking about it, I'm pretty sure that internal components are already built to that level of accuracy. They'd have to be (I think?). Think about parts with mating holes for fasteners, etc.

So if he's just talking about body panels, it seems a bit extreme, maybe twice as much as actually needed?

IMG_7293.JPG

IMG_7294.JPG
IMG_7295.JPG
Just to let you know, you are a factor of 10 with that giant .004" gap. A calipers is not accurate enough for that level of precision (typically +/-.001) and you have to start looking at mircometers (the tool).

Having measurement tools to measure to this level at a production scale is non trivial.

Elon does turn the impossible to "merely late" but this sounds more ridiculous that landing rockets or self driving cars.

Sure some dimensions on some parts can be that accurate, but as a blanket statement across the entire product its pure insanity. I bet most parts shrink and expand thermally more than this tolerance. If you know anything about statistical process control, you know this sounds like science fiction.


Tesla Cybertruck Elon sends employees email on Cybertruck build quality: accuracy & tolerances must be in microns -- "Precision predicates perfectionism." 1693252985520
 

cvalue13

Well-known member
Joined
Aug 17, 2022
Threads
74
Messages
7,147
Reaction score
13,759
Location
Austin, TX
Vehicles
F150L
Occupation
Fun-employed
Country flag
Just to let you know, you are a factor of 10 with that giant .004" gap. A calipers is not accurate enough for that level of precision (typically +/-.001) and you have to start looking at mircometers (the tool).

Having measurement tools to measure to this level at a production scale is non trivial.

Elon does turn the impossible to "merely late" but this sounds more ridiculous that landing rockets or self driving cars.

Sure some dimensions on some parts can be that accurate, but as a blanket statement across the entire product its pure insanity. I bet most parts shrink and expand thermally more than this tolerance. If you know anything about statistical process control, you know this sounds like science fiction.


1693252985520.png
for days there was a xwitter theme of engineers and precision machinists mocking Musk for having not gotten the nomenclature/math correct

i'm not one, so i wont rehash, but it was a rather convincing discussion that both the language and math Musk invoked was incorrect - and even if corrected, would be an impossible tolerance











Sponsored

 
 




Top