mikeymore Posted November 5, 2011 Share Posted November 5, 2011 Helle everybody, I am modelling on an object which exists of a sphere with a lot of lightbulbs around it. I made asphere and 1 light surrounded by 6 lightbulbs. My intension is to make a perfect symmitrical sphere of lightbulbs. I work with Autocad Mechanical 2012 (not for so long) and quit new into the world of CAD. I worked with the command array, and that worked fine, but I don't know how to repeat the cluster of 7 bulbs all over the sphere. Any one an ide?? Thanks in advance. drwaing.zip Quote Link to comment Share on other sites More sharing options...
ReMark Posted November 6, 2011 Share Posted November 6, 2011 Perhaps you might be able to utilize the 3DARRAY command? I'm not on my CAD computer at the moment so I cannot view your drawing file. Quote Link to comment Share on other sites More sharing options...
Jack_O'neill Posted November 6, 2011 Share Posted November 6, 2011 When I try to open your file, my system gives an error saying the "compressed folder is invalid or corrupt". Quote Link to comment Share on other sites More sharing options...
mikeymore Posted November 6, 2011 Author Share Posted November 6, 2011 mmm strange, if I try here the file is fine. It's a rar file into a zipfile, to be under 500 kb for zipfiles. I will post the original dwg file if its possible, but now its about 1,17 mb large and therefor on this forum not allowed. Can I reduce the size in Acad easily?? Quote Link to comment Share on other sites More sharing options...
ReMark Posted November 7, 2011 Share Posted November 7, 2011 Did you purge the file before zipping it? That probably still won't get it down to a size small enough to post if you are starting at 1.7MB. Quote Link to comment Share on other sites More sharing options...
mikeymore Posted November 7, 2011 Author Share Posted November 7, 2011 No I didn't. I was surfing on the net and found a model what I want to make. It's a sphere divided in faces with 6 corners, thats the way to make a perfect round sphere with even parts. I don't know if it can be made in ACAD (mechanical) ??? On every part of the sphere I want to place an object, thats the meaning of my question. Thanx already! Quote Link to comment Share on other sites More sharing options...
ReMark Posted November 7, 2011 Share Posted November 7, 2011 Can you tell us where to find this model you're talking about? Quote Link to comment Share on other sites More sharing options...
SEANT Posted November 7, 2011 Share Posted November 7, 2011 Like this, maybe. Sphere.dwg Quote Link to comment Share on other sites More sharing options...
mikeymore Posted November 7, 2011 Author Share Posted November 7, 2011 Yesss, thanx seant, thats exactly what I ment. I also found on the web that a sphere with equel parts is called a Dodecahedron. See images, I made in Maya. Now is the question, how to make a certain sphere in Acad and assign a sphere on each part???I cant do it with 3D array isn't?? Quote Link to comment Share on other sites More sharing options...
therealsaint01 Posted November 7, 2011 Share Posted November 7, 2011 what about this? small sphere's around a larger spheresphere+sphere.dwg Quote Link to comment Share on other sites More sharing options...
JD Mather Posted November 7, 2011 Share Posted November 7, 2011 ... a sphere with equel parts is called a Dodecahedron. No - that is a polyhedron with 12 flat faces. You could divide up a sphere into many more faces. I started to take a look at your file and then realized that you used a 3rd party app to compress. Why not use Windows? Quote Link to comment Share on other sites More sharing options...
Jack_O'neill Posted November 7, 2011 Share Posted November 7, 2011 This site might help with the names of various polyhedra: http://mathforum.org/dr.math/faq/faq.polygon.names.html Can you say triacontakaienneahedron? Quote Link to comment Share on other sites More sharing options...
mikeymore Posted November 7, 2011 Author Share Posted November 7, 2011 @theralsaint: Thanks for the post, but thats not exactly what I ment. The spheres must have exact the same distance to eachother, so on every side of the sphere. It can be made by a Dodecaheron, exact the same triangles on every point of a sphere. I can made in Maya, by hand, but I want to do it the exact way in Acad. @JD mather: My Acad file wasn't that important, thats made by a sphere and some lightbulbs I want to connect to it. That was before you told me that it is a polyhedron (I am newbee to this mathematical stuff) I just want to attach lightbulbs (but in cad a sphere is also good enough) exact to the middle of each triangle. My questions: 1) how to make this sphere in Acad? 2) Can I attach (by array or something) a sphere in the middle of the triangle, or do I have to do this by hand?? Thanks all for the replies! Quote Link to comment Share on other sites More sharing options...
mikeymore Posted November 7, 2011 Author Share Posted November 7, 2011 Oops I posted a reply, but its lost.... Anyway, thanks for all the replies, the only thing that I want to know now is: Can I change the params in Acad to make such polyhedron?? I am quit new to CAD. I want to put on the centre of each triangle a sphere. Do I have to do that by hand?? I guess it can snap with a point on the sphere with the centrepoint of the triangle? @jack-oneill: actually the triacontakaienneahedron won't be it.... I also have troubles to say the dinosaurs names in my sons dino-book haha Quote Link to comment Share on other sites More sharing options...
Jack_O'neill Posted November 8, 2011 Share Posted November 8, 2011 Oops I posted a reply, but its lost.... Anyway, thanks for all the replies, the only thing that I want to know now is: Can I change the params in Acad to make such polyhedron?? I am quit new to CAD. I want to put on the centre of each triangle a sphere. Do I have to do that by hand?? I guess it can snap with a point on the sphere with the centrepoint of the triangle? @jack-oneill: actually the triacontakaienneahedron won't be it.... I also have troubles to say the dinosaurs names in my sons dino-book haha Lol...I can't pronounce it either but it has 39 facets! Can you imagine what a pain in the katookus it would be to figure out how to put 39 equal facets on a sphere.... Quote Link to comment Share on other sites More sharing options...
SEANT Posted November 8, 2011 Share Posted November 8, 2011 AutoCAD does not have any native commands to produce that polyhedron – as primitive geometry. Those shapes can be modeled(i.e., multi step process), see this thread as reference: http://www.cadtutor.net/forum/showthread.php?50206 I used the model in that thread to derived some Arc/Triangles that may offer a basis for further geodesics type analysis. Perhaps spheres could be positioned by copying to the appropriate osnap point. Automating the process further would require custom programming. Geodesic.dwg Quote Link to comment Share on other sites More sharing options...
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