CAD for simple 3-D metal & wood projects?
On 11/24/2013 12:45 AM, Gunner Asch wrote:
On Sun, 24 Nov 2013 00:20:47 -0600,
wrote:
On 11/24/2013 12:00 AM, Gunner Asch wrote:
On Sat, 23 Nov 2013 23:33:15 -0500, "Mike Marlow"
wrote:
Gunner Asch wrote:
Ayup...aerospace requires 50 millions or half 10ths all the time.
Which is damned hard to do with machines that hold +/- 2 tenths
One might think it is impossible to do with repeatability and assurance.
Hardly impossible. It happens many thousands..hundreds of thousands
of parts a day.
So - I am curious - what is it that aerospace requires that is 50
"millions"? I worked in that space for a while and I never saw any
tolerances like that - but that does not say much. I believe that even the
space shuttle does not demand tolerances that close - but I really do not
know.
Jet engine parts, microwave wave guides, thousands of things. Most of
which I was not cleared to know what they were when I ran into them..
An awful lot of optical stuff is that or more.
Shrug. And a lot of that stuff I figured would be good at
+0/- .001...but..the specs...
As the truism goes...the more zeros you add to the right of the
decimal point...you multiply the cost by a factor of 5-10
Half a thou? (NOBODY says 50 millionths!)
Half a thou isnt 50 millionths. Its only 5 tenths.
Half a tenth..is 50 millionths.
Half a TENTH.
I woke up in the middle of the night and realized I wrote that wrong.
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