kakody1 Posted April 26, 2009 Author Share Posted April 26, 2009 yes that exactly i need a solid of the drawing given. I have managed to do seperate each edge of the drawing but when i try to use the loft cmd that seems to suit to my case gives the error message i have written u! Thank u very much for your considereration. Quote Link to comment Share on other sites More sharing options...
SEANT Posted April 26, 2009 Share Posted April 26, 2009 As mentioned, AutoCAD will not loft a non-planar spline. If the cross sections need modification anyway, it might be a good opportunity to reduce Fit Point count. This may require some rework to keep the resulting solid in tolerance. Here I’ve divided each loft into 32 sections and recreated the flattened spline (osnapz). I’ve also added a couple extra guide curves to make the result more predictable. The ends of the original curve suggested that this wing may be incorporated into some shroud or ducted fan. The “End treatment” curves could be lofted, and the resulting surface used to SLICE the ends of the lofted solid to more closely match the original curves. I didn’t do that last step because the file size expanded beyond the forum limits. WingCrvReduced.dwg Quote Link to comment Share on other sites More sharing options...
kakody1 Posted April 26, 2009 Author Share Posted April 26, 2009 i designed the surfaces and from what i had made where most superior. The next step is to convert the surfaces to one solid! I have tried to use thicken cmd to the whole part and to the upper and the lower part* of the wind but the this command does not works. Is there any other cmd that i can tryso as to make it to solid *i was thinking of thickening uper and lower part and then intersect hte to parts so i can get the solid object. Quote Link to comment Share on other sites More sharing options...
kakody1 Posted April 26, 2009 Author Share Posted April 26, 2009 Command: THICKEN Specify thickness : 4 Object intersects itself. Surface cannot be thickened with specified value. This is the message i take when i try to thicken and i cannot understand why!!! Quote Link to comment Share on other sites More sharing options...
shift1313 Posted April 26, 2009 Share Posted April 26, 2009 well there is a difference between a mesh and a surface. If you used the command edgesurf, you created a mesh surface and thicken will not work. If you lofted a single line, thicken will work, but looking at your profile i do not think this will be the best for you. Its slightly more complicated but i would make that part using planar sketches on either end, loft it, then create a surface at each end and slice the part down to what you need. SEANT told you how he made the solid as well Quote Link to comment Share on other sites More sharing options...
kakody1 Posted April 27, 2009 Author Share Posted April 27, 2009 If you lofted a single line, thicken will work That is what i cannot understand. why i cannot thicken a lofted surface and gives me the message above. it is alofted (not closed) surface! Quote Link to comment Share on other sites More sharing options...
kakody1 Posted April 27, 2009 Author Share Posted April 27, 2009 as for instructions on how to make a solid given by SEANT i may be lacikng on knowledge on Autocad and i can' t understand what have to be done! Quote Link to comment Share on other sites More sharing options...
shift1313 Posted April 27, 2009 Share Posted April 27, 2009 can you uploade a dwg of your lofted surface? Quote Link to comment Share on other sites More sharing options...
kakody1 Posted April 27, 2009 Author Share Posted April 27, 2009 inside the link below is the dwg file that contains the whole wing with a close loft cmd, the wing devided in the upper and lower surface that is lofted but not closed and the 3d scetch without any kind of surfaces http://rapidshare.com/files/226350316/testok2.dwg.html the file was very large to attach Quote Link to comment Share on other sites More sharing options...
JD Mather Posted April 27, 2009 Share Posted April 27, 2009 ...project i have for my school! Autodesk Inventor would be far more appropriate for this project. Students can download Inventor for free from http://engineersrule.org I have been given a shape of a wing in 3 dimensions made up with splines Where did the original splines come from? As I suspected way too many uneeded control points on the splines. Quote Link to comment Share on other sites More sharing options...
kakody1 Posted April 27, 2009 Author Share Posted April 27, 2009 my school is in greece and we can' t download from this site and besides that we are working with this autocad in school. we are taking exams on this!!! The professor gave us the original splines and i don' t know where they come from! Quote Link to comment Share on other sites More sharing options...
JD Mather Posted April 27, 2009 Share Posted April 27, 2009 my school is in greece and we can' t download from this site Any students anywhere in the world can download this free software. we are taking exams on this!!! The professor gave us the original splines and i don' t know where they come from! The original splines are garbage. (see attached) Good luck on the exams. I could recreate the most complex of the original splines with about 6 control points - maybe fewer. It would be far more smooth resulting in a smoother wing surface. Quote Link to comment Share on other sites More sharing options...
JD Mather Posted April 27, 2009 Share Posted April 27, 2009 inside the link below is the dwg file that contains the whole wing with a close loft cmd, Where did the solid come from? It does not appear to have been created from those splines in AutoCAD as the ends are planar and the splines are not. It is also much smoother than the splines? Quote Link to comment Share on other sites More sharing options...
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