Jonny 290 posted:

how long till they spin their inability to run sheet metal brakes well enough to make all the panels look the same and instead start selling "personalized" editions where all the panels are warped and hosed up in a way such that no two are alike. it's your cybertruck and yours alone. you love the car.

Jonny 290 posted:

how long till they spin their inability to run sheet metal brakes well enough to make all the panels look the same and instead start selling "personalized" editions where all the panels are warped and hosed up in a way such that no two are alike. it's your cybertruck and yours alone. you love the car.

Malloc Voidstar posted:

Consummate Professional posted:

sue who, for what???

That DICK! posted:

fallout terminal entry 1/3

Karia posted:

In a vacuum, a 10 micron tolerance isn't that hard to hold, for some kinds of features, for some kinds of manufacturing processes. I've set up automotive machining lines where critical features, like critical bore diameters or the distance between two precision dowel holes, would get held to +-0.005 mm, statistically capable to a 1.67 Ppk (that means that we statistically estimate that no more than 0.6 parts per million would be out of tolerance). It takes some fiddling,, but it can be done. Bore honing's another example, they routinely hold that sort of tolerance as well. But you'd never try to do that on every feature on a component, let alone the entire car! Even ultra-precise measuring instruments and stuff have a whole ton of tolerances which are like "make a drat clearance hole, who cares so long as the bolt goes through." And that's with machining! Trying to hold that sort of tolerance on sheet metal or die castings is sheer insanity. Even measuring that sort of tolerance on large parts gets really tricky and you have to start taking into account stuff like how much the part sags under its own weight.

Blackhawk posted:

So I wonder at what temperature they're going to specify those dimensions with 10 micron tolerances, if you're talking about a large part like a body panel that could easily change by more than 10 microns in size over a range of normal room temperatures.

Karia posted:

In a vacuum, a 10 micron tolerance isn't that hard to hold, for some kinds of features, for some kinds of manufacturing processes. I've set up automotive machining lines where critical features, like critical bore diameters or the distance between two precision dowel holes, would get held to +-0.005 mm, statistically capable to a 1.67 Ppk (that means that we statistically estimate that no more than 0.6 parts per million would be out of tolerance). It takes some fiddling,, but it can be done. Bore honing's another example, they routinely hold that sort of tolerance as well. But you'd never try to do that on every feature on a component, let alone the entire car! Even ultra-precise measuring instruments and stuff have a whole ton of tolerances which are like "make a drat clearance hole, who cares so long as the bolt goes through." And that's with machining! Trying to hold that sort of tolerance on sheet metal or die castings is sheer insanity. Even measuring that sort of tolerance on large parts gets really tricky and you have to start taking into account stuff like how much the part sags under its own weight.

Uncle Wemus posted:

What is the unit of measurement for tolerance

Karia posted:

you have to start taking into account stuff like how much the part sags under its own weight.

shyduck posted:

also seems like thermal expansion would throw all of this out the window

apatheticman posted:

What a loving idiot.

Tolerances only found in million-dollar lab equipment.

Jesus loving christ.

Isentropy posted:

one of the foundational machine shop experiences in engineering school I remember is when guys would come in with their drawings as needing 100.0000 mm and the machinist with 45 years experience would calmly explain what that would cost

nikosoft posted:

Look, Elon knows more about manufacturing than anyone else on earth

shyduck posted:

I learned more about practical engineering during my time in machine shop than I did from a lot of my coursework so that tracks

Karia posted:

In a vacuum, a 10 micron tolerance isn't that hard to hold, for some kinds of features, for some kinds of manufacturing processes. I've set up automotive machining lines where critical features, like critical bore diameters or the distance between two precision dowel holes, would get held to +-0.005 mm, statistically capable to a 1.67 Ppk (that means that we statistically estimate that no more than 0.6 parts per million would be out of tolerance). It takes some fiddling,, but it can be done. Bore honing's another example, they routinely hold that sort of tolerance as well. But you'd never try to do that on every feature on a component, let alone the entire car! Even ultra-precise measuring instruments and stuff have a whole ton of tolerances which are like "make a drat clearance hole, who cares so long as the bolt goes through." And that's with machining! Trying to hold that sort of tolerance on sheet metal or die castings is sheer insanity. Even measuring that sort of tolerance on large parts gets really tricky and you have to start taking into account stuff like how much the part sags under its own weight.

Karia posted:

In a vacuum, a 10 micron tolerance isn't that hard to hold, for some kinds of features, for some kinds of manufacturing processes. I've set up automotive machining lines where critical features, like critical bore diameters or the distance between two precision dowel holes, would get held to +-0.005 mm, statistically capable to a 1.67 Ppk (that means that we statistically estimate that no more than 0.6 parts per million would be out of tolerance). It takes some fiddling,, but it can be done. Bore honing's another example, they routinely hold that sort of tolerance as well. But you'd never try to do that on every feature on a component, let alone the entire car! Even ultra-precise measuring instruments and stuff have a whole ton of tolerances which are like "make a drat clearance hole, who cares so long as the bolt goes through." And that's with machining! Trying to hold that sort of tolerance on sheet metal or die castings is sheer insanity. Even measuring that sort of tolerance on large parts gets really tricky and you have to start taking into account stuff like how much the part sags under its own weight.

Malloc Voidstar posted:

shyduck posted:

We need to write cleaner G-code

Karia posted:

In a vacuum, a 10 micron tolerance isn't that hard to hold, for some kinds of features, for some kinds of manufacturing processes. I've set up automotive machining lines where critical features, like critical bore diameters or the distance between two precision dowel holes, would get held to +-0.005 mm, statistically capable to a 1.67 Ppk (that means that we statistically estimate that no more than 0.6 parts per million would be out of tolerance). It takes some fiddling,, but it can be done. Bore honing's another example, they routinely hold that sort of tolerance as well. But you'd never try to do that on every feature on a component, let alone the entire car! Even ultra-precise measuring instruments and stuff have a whole ton of tolerances which are like "make a drat clearance hole, who cares so long as the bolt goes through." And that's with machining! Trying to hold that sort of tolerance on sheet metal or die castings is sheer insanity. Even measuring that sort of tolerance on large parts gets really tricky and you have to start taking into account stuff like how much the part sags under its own weight.