On Saturday 01 June 2013 05:33:33 Gregg Eshelman did opine: > --- On Fri, 5/31/13, andy pugh <bodge...@gmail.com> wrote: > > From: andy pugh <bodge...@gmail.com> > > Subject: Re: [Emc-users] Adjustable Kinnematics? > > To: dengv...@charter.net, "Enhanced Machine Controller (EMC)" > > <emc-users@lists.sourceforge.net> Date: Friday, May 31, 2013, 6:51 PM > > On 1 June 2013 01:45, dave <dengv...@charter.net> > > > > wrote: > > > In that vein I heard a story about a piece being > > > > machined at Hanford. > > > > > The dwg called for a hole xxx in dia yyy in depth > > > > within this very > > > > > complex part. The machinist did it as called out but > > > > the drawing was > > > > > wrong. > > > > "Drawing wrong" can lead to long arguments. I have made > > drawings like > > that. I had 1mm tolerance on several things, and .01 on a > > very thin web. They machined to nominal dimensions…. > > Somewhere on the web (I can't find it now) is a hilarious RFQ rejection > form with checkboxes for many reasons why a shop can't or won't do a > job. > > One of them is something like Zero or negative wall thickness. We don't > care if your part is gone when we're done machining, we're still > getting paid. > I remember some stuff like that that Martin-Marietta had back when we were building the original Titan I's in '60-61, shop drawings, complete with part numbers to request of a bunch of special bolts that might be needed if the holes didn't line up etc. Totally impossible to make, or install, stuff. Folks would stop & stare at that for several minutes until it dawned on them that some draftsman had entirely too much time on his hands.
This if it can be found again, and a fresh copy of that I'd love to post in my shop for the entertainment value. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! My views <http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml> To use violence is to already be defeated. -- Chinese proverb A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. ------------------------------------------------------------------------------ Get 100% visibility into Java/.NET code with AppDynamics Lite It's a free troubleshooting tool designed for production Get down to code-level detail for bottlenecks, with <2% overhead. Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
