Step 6: Export the file

OK, the file is ready to be exported, so let's do it!

 - Select File>Export>3D Model
 - Choose a name, but before you export, click "Options"
 - Make sure the same items are selected as in Picture 3 and click "OK"
 - Make sure that the format is "COLLADA File (*.dae)"
 - Click "Export"!
:O so cool!
Hiya<br><br>I would love to see it added to the 3D print group I have just started<br><br>http://www.instructables.com/group/3Dprint/<br><br>Thanks
This is very interesting!<br>What did this cost for example?
Yes what did cost???
cool hey yo semm good fungas with sketch up could i make a game using stuff from skethup tanks tinker
I want a 3D printer so bad!!!!!!!!!!!!!!!!!!!!!!!!!!!!<br>Nice Menger Sponge!<br>It would be so awesome in gold plated steel.... epic win!
I just drew this up in Sketchup - it took about 30 minutes. I also have Alibre, but I find it too complicated, Sketchup is fast and easy to use. <br>http://sketchup.google.com/3dwarehouse/details?mid=2fb27d07c11af89eeae3eee872e388f6 <br>Bruce
That's funny, I just drew it in SketchUp in one second. I'm not kidding. Of course I had a little help from this plug-in ;) :<br><br>http://regularpolygon.blogspot.com/2010/08/plugin-menger-sponge-10.html<br><br>
lol.... guess there is the hard way (alibre), easy way (Sketchup by hand) and the &quot;punch who through what?!?!?&quot; way (Plugin)
I just downloaded that script, it looks like fun :)
I love it!<br>Just out of curiosity, how big is the finished model, what material did you use for the final model, and do you have them available for purchase on the pokono site? I want one!
This model is about 1.4" on each side, made with the "durable plastic," and I don't have them available for purchase currently. It's pretty easy to make your own, though, and then you can tweak the size.
lol....you sound like a broken record.... need a web page set up to just send them to?
This is really neat. I never heard of Ponoko. It's a good idea but it seems expensive. How much did this small model cost? What do you get for the money? Does it come in cut sheets or do they assemble it for you? I'm sure I'm not the only one who has these questions. <br> <br>As for 3D CAD programs, I've used most of them, including Sketchup. I found Sketchup really almost impossible to use to do anything. OK, it's free but . . . The major CAD programs have all kinds of features that make doing repetitive tasks, like this, easy--once you learn how. They are difficult to learn, admittedly, but so is Sketchup, frankly. That would be just about my last choice. Considering how hard it is to use, you did a great job. Kudos! <br>
It's 3D printed so it arrives just like you see it, one solid piece. This is 1.4" on a side and cost $26 for production and materials, plus more for tax and shipping.<br /><br />I've used a few different 3D CAD programs, although not extensively, and each has different uses. SketchUp is, like the name says, good for sketching. I've seen it used in architectural consultations, for example. <br /><br />I think that if your uses are more intense it wouldn't be something you'd turn to. In the DIY space it's very useful.
Holy cow! $26 for a 1.4&quot; cube?
Yup. What can I say, I'm a math geek and wanted a Menger sponge.
Hey you won! Congratulations!<br><br>&quot;Congratulations to Ed Lewis, aka Fungus Amungus, who created an all-around fantastic Instructable for using Google SketchUp with Ponoko 3D printing to win the Google + Ponoko Challenge&quot;<br><br>http://blog.ponoko.com/2010/12/21/announcing-the-google-ponoko-challenge-winner/<br><br>Now let's see this in gold-plated stainless . . . LOL<br>
Interesting that you chose to build it up rather than start with the final sized cube and just push square cuts through the cube then repeat the feature for 2 more faces. Perhaps it's just a difference between Sketchup and the software I use?
For the first iteration you could go either way and the difference in time is minimal. For the second iteration, there's a sizable advantage to building. For the purposes of the Instructable it's easier to just discuss one technique that repeats.
I mean... start with the whole cube, not 1/729ths of it then cut 81 small squares all the way through 3 faces, then 9 medium squares all the way through the 3 faces, then 1 big square through the 3 faces. I just found it interesting you did it your way not that way, since it looks like it shows the difference between the mechanics of SketchUp and the program I use, Alibre.
We're still talking about the same thing. For building, each iteration is a construction. For subtracting, each iteration is making a set of squares to punch through.<br /><br />For your technique, you'd need to push through 192 small squares (64*3), 24 medium squares (8*3) and 3 large squares for a total of 219 pushes through. <br /><br />I've never used Alibre, but on SketchUp it would take me far longer just to set up one face of small squares to push through than to make the whole model (about 5 minutes).
I wonder how much easier it'd be in openscad?<br><br>it'll probably just end up as a parametric mess of for loops...
A parametric OpenSCAD version:<br>http://www.thingiverse.com/thing:5321<br><br><br>size = 99; //side length<br>level = 3; //menger level<br><br>intersection(){<br> rotate([0,0,0])translate([-size/2,-size/2,-size/2])singleSide();<br> rotate([0,90,0])translate([-size/2,-size/2,-size/2])singleSide();<br> rotate([0,0,90])translate([-size/2,-size/2,-size/2])singleSide();<br>}<br><br><br>module singleSide(){<br> difference(){<br> cube(size);<br> for(i=[1:level]){<br> for(j=[0:pow(3,i)-1]){<br> for(k=[0:pow(3,i)]){<br> translate([-size/2,j*size/pow(3,i),k*size/pow(3,i)]){<br> //echo(round((j+2)/3)==(j+2)/3);<br> //echo((j+2)/3);<br> if(round((j+2)/3)==(j+2)/3){ <br> if(round((k+2)/3)==(k+2)/3){<br> cube([2*size,size/pow(3,i),size/pow(3,i)]);<br> }<br> }<br> }<br> }<br> }<br> }<br> }<br>}
all in all it will be six one way and half a dozen the other. You really just need to do thinngs the way you are comfortable with and feel will get the &quot;right&quot; results. I agree with time saved by building up. I can copy and paste faster then placing all my squares to push. This instructable opended my eyes to a new way to have my prototype made up. Thanks for this ible. and BTW. what the heck did you happen to use this for? and what was it made out of?
It would seem it definitely depends on the software then! Alibre has some neat &quot;feature repeat/mirror/rotate&quot; features that probably mean the difference between spending HOURS drawing little squares and not. Perhaps I'll document the steps to show the difference if you're interested Ed.
There probably is a lot of difference between programs that can be used to make this type of 3D model, but the instructable itself is about SketchUp. Speaking from experience with this program I can say that building up is a lot easier than pushing the holes through. Not only would you have to push out all of the smaller holes inside the model (which would take a lot of attention to detail and leave a lot of room for error), but you would have to do so on every single side, 219 times for a level-3 Menger sponge as fungus amungus stated. That whole process could take hours, but it only took me about 20 minutes to make an entire level-4 Menger sponge by building up (even with a slow computer like mine).
True, and that 219 number isn't the whole story ether for SketchUp. Once one side has been pushed through and created holes, the other sides won't push all the way through the entire cube, just to the next face.
Sure. I've never played around with Alibre before.
Cool, glad the info will help you out. This is just being used as a decoration on my desk. I like fractals and figured it would be nice to have one. This is made out of the "durable plastic" available on Ponoko.
We made these in my Mathematics for Design class. We took old business cards and made millions of small cubes and then stacked them together.

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Bio: I like to make things for the internets. I also sell a pretty cool calendar at supamoto.co. You'll like it.
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