Re: [Emc-users] A project I want to do on a CNC mill
inkscape makes this easy in Linux. with the gcodetools extension, producing the g-code is a snal too. Walt On Apr 11, 2013, at 10:10 PM, jeremy youngs jcyoung...@gmail.com wrote: just get a picture with something of KNOWN size in it raster it in a vector program ( photoshop will do this ) import to autocad as dxf, measure known point to point divide known measurement by measurement made in autocad then rescale to the quotient . trim all but desired out of dxf . import to mastercam write program make :) now how to do this with all linux programs well i havent got there yet but when i do i will swear off bill gates forever:) note perpendicularity of the photo is very crucial to get accurate scaling this can be used with any photo sometimes to an accuracy of a couple of thousandths depending on perpendicularity and the accuracy of the known measured item On Thu, Apr 11, 2013 at 9:49 PM, Gregg Eshelman g_ala...@yahoo.com wrote: I'd like to get the exact dimensions for the triangle pattern used in the wall and floor panels of Skylab. Looks like there are round holes, possibly threaded, where the triangle holes meet. Why that pattern? Because it's an interesting design and looks like it could be useful for other purposes, especially if the round holes are threaded. Anyone live near the Air and Space Museum? Would they allow someone in with a digital caliper to take measurements? The only other places I know of that may have those panels are the two Skylab simulators, if they were built to fully duplicate the two built for launching. -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- jeremy youngs -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ( ͡° ͜ʖ ͡°) Walt Scrivens wa...@gate.net -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] A project I want to do on a CNC mill
On 04/11/2013 11:20 PM, Gregg Eshelman wrote: The radius of the points of the triangles is given as 0.228 inch I read it as 0.22R, which is almost exactly half the 0.438 DIA given for the holes. Using 0.438/2 would be Close Enough, methinks. That'd be fun to construct on a 3D printer... one with a build platform the size of my living room! -- Ed softsolder.com -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] A project I want to do on a CNC mill
On Friday 12 April 2013 13:40:54 Ed Nisley did opine: On 04/11/2013 11:20 PM, Gregg Eshelman wrote: The radius of the points of the triangles is given as 0.228 inch I read it as 0.22R, which is almost exactly half the 0.438 DIA given for the holes. Using 0.438/2 would be Close Enough, methinks. That'd be fun to construct on a 3D printer... one with a build platform the size of my living room! Chuckle, but what then would you do for a wife? That would not only wreck her plans for the living room, but wipe out the bank account too? :) But we dream, and its the dreams we make our reality from. :) 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 Rome wasn't burnt in a day. A pen in the hand of this president is far more dangerous than a gun in the hands of 200 million law-abiding citizens. -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] A project I want to do on a CNC mill
just get a picture with something of KNOWN size in it raster it in a vector program ( photoshop will do this ) import to autocad as dxf, measure known point to point divide known measurement by measurement made in autocad then rescale to the quotient . trim all but desired out of dxf . import to mastercam write program make :) now how to do this with all linux programs well i havent got there yet but when i do i will swear off bill gates forever:) note perpendicularity of the photo is very crucial to get accurate scaling this can be used with any photo sometimes to an accuracy of a couple of thousandths depending on perpendicularity and the accuracy of the known measured item On Thu, Apr 11, 2013 at 9:49 PM, Gregg Eshelman g_ala...@yahoo.com wrote: I'd like to get the exact dimensions for the triangle pattern used in the wall and floor panels of Skylab. Looks like there are round holes, possibly threaded, where the triangle holes meet. Why that pattern? Because it's an interesting design and looks like it could be useful for other purposes, especially if the round holes are threaded. Anyone live near the Air and Space Museum? Would they allow someone in with a digital caliper to take measurements? The only other places I know of that may have those panels are the two Skylab simulators, if they were built to fully duplicate the two built for launching. -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- jeremy youngs -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] A project I want to do on a CNC mill
This seems to have been recently scanned, found it on Wikipedia. Isogrid hadn't turned up in my previous searches for this. Isogrid Design Handbook, NASA CR-124075, McDonnell Douglas, 1973 http://femci.gsfc.nasa.gov/Isogrid/NASA-CR-124075_Isogrid_Design.pdf And skipping through a tone of theory, math, more math, lots more math and other 'this is how we do it' stuff... Page 42 has the dimensions of the panels as used on Skylab! That would be so easy to have cut on a water jet. When were those invented? I'd expect the originals to have been cut out with an NC mill, which would've converted quite a lot of the plate to chips. --- On Thu, 4/11/13, jeremy youngs jcyoung...@gmail.com wrote: From: jeremy youngs jcyoung...@gmail.com Subject: Re: [Emc-users] A project I want to do on a CNC mill To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Date: Thursday, April 11, 2013, 8:10 PM just get a picture with something of KNOWN size in it raster it in a vector program ( photoshop will do this ) import to autocad as dxf, measure known point to point divide known measurement by measurement made in autocad then rescale to the quotient . trim all but desired out of dxf . import to mastercam write program make :) now how to do this with all linux programs well i havent got there yet but when i do i will swear off bill gates forever:) note perpendicularity of the photo is very crucial to get accurate scaling this can be used with any photo sometimes to an accuracy of a couple of thousandths depending on perpendicularity and the accuracy of the known measured item On Thu, Apr 11, 2013 at 9:49 PM, Gregg Eshelman g_ala...@yahoo.com wrote: I'd like to get the exact dimensions for the triangle pattern used in the wall and floor panels of Skylab. Looks like there are round holes, possibly threaded, where the triangle holes meet. Why that pattern? Because it's an interesting design and looks like it could be useful for other purposes, especially if the round holes are threaded. Anyone live near the Air and Space Museum? Would they allow someone in with a digital caliper to take measurements? The only other places I know of that may have those panels are the two Skylab simulators, if they were built to fully duplicate the two built for launching. -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] A project I want to do on a CNC mill
IT LOOKS TREMENDOUSLY STRONG AND AGREE IT COULD BE USEFUL On Thu, Apr 11, 2013 at 10:36 PM, Gregg Eshelman g_ala...@yahoo.com wrote: This seems to have been recently scanned, found it on Wikipedia. Isogrid hadn't turned up in my previous searches for this. Isogrid Design Handbook, NASA CR-124075, McDonnell Douglas, 1973 http://femci.gsfc.nasa.gov/Isogrid/NASA-CR-124075_Isogrid_Design.pdf And skipping through a tone of theory, math, more math, lots more math and other 'this is how we do it' stuff... Page 42 has the dimensions of the panels as used on Skylab! That would be so easy to have cut on a water jet. When were those invented? I'd expect the originals to have been cut out with an NC mill, which would've converted quite a lot of the plate to chips. --- On Thu, 4/11/13, jeremy youngs jcyoung...@gmail.com wrote: From: jeremy youngs jcyoung...@gmail.com Subject: Re: [Emc-users] A project I want to do on a CNC mill To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Date: Thursday, April 11, 2013, 8:10 PM just get a picture with something of KNOWN size in it raster it in a vector program ( photoshop will do this ) import to autocad as dxf, measure known point to point divide known measurement by measurement made in autocad then rescale to the quotient . trim all but desired out of dxf . import to mastercam write program make :) now how to do this with all linux programs well i havent got there yet but when i do i will swear off bill gates forever:) note perpendicularity of the photo is very crucial to get accurate scaling this can be used with any photo sometimes to an accuracy of a couple of thousandths depending on perpendicularity and the accuracy of the known measured item On Thu, Apr 11, 2013 at 9:49 PM, Gregg Eshelman g_ala...@yahoo.com wrote: I'd like to get the exact dimensions for the triangle pattern used in the wall and floor panels of Skylab. Looks like there are round holes, possibly threaded, where the triangle holes meet. Why that pattern? Because it's an interesting design and looks like it could be useful for other purposes, especially if the round holes are threaded. Anyone live near the Air and Space Museum? Would they allow someone in with a digital caliper to take measurements? The only other places I know of that may have those panels are the two Skylab simulators, if they were built to fully duplicate the two built for launching. -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- jeremy youngs -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] A project I want to do on a CNC mill
I've found an error in one of the dimensions. The radius of the points of the triangles is given as 0.228 inch but that's impossible with the diameter of the holes at 0.438. Fitting a 0.228 radius tangent to the 0.070 thick bars makes it intersect the holes. Oops! Someone didn't sanity check the drawing... Changing the tip radius to the same as the hole diameter makes the design match the drawing. Alternatively, it could be the web bar thickness dimension is wrong, but they'd have to be a lot thicker and thus heavier to make the 0.228 triangle tip radius work. The bottom of the 8 is cut off so I figured it might be 0.338 but that's still too small. I'll go with 0.438 on them because it looks more like the drawing and photos of the grids. Perhaps this was McDonnell Douglas being like DaVinci, putting a deliberate error into a drawing not intended as a manufacturing document. Or it could be a typo, someone hit a 4 instead of a 3. Whatever the reason, proofreaders missed it. Proofreading, not like it's rocket science, eh? Should have a 3D model done in a few... --- On Thu, 4/11/13, jeremy youngs jcyoung...@gmail.com wrote: From: jeremy youngs jcyoung...@gmail.com Subject: Re: [Emc-users] A project I want to do on a CNC mill To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Date: Thursday, April 11, 2013, 8:49 PM IT LOOKS TREMENDOUSLY STRONG AND AGREE IT COULD BE USEFUL On Thu, Apr 11, 2013 at 10:36 PM, Gregg Eshelman g_ala...@yahoo.com wrote: This seems to have been recently scanned, found it on Wikipedia. Isogrid hadn't turned up in my previous searches for this. Isogrid Design Handbook, NASA CR-124075, McDonnell Douglas, 1973 http://femci.gsfc.nasa.gov/Isogrid/NASA-CR-124075_Isogrid_Design.pdf And skipping through a tone of theory, math, more math, lots more math and other 'this is how we do it' stuff... Page 42 has the dimensions of the panels as used on Skylab! That would be so easy to have cut on a water jet. When were those invented? I'd expect the originals to have been cut out with an NC mill, which would've converted quite a lot of the plate to chips. -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
