Gordian Knot 3D Puzzle

by Lenbok Sep 3, 2011
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I printed it in all black, fiddled with it a little, went to check the solution.... Ah hell naw !! O.o
Took me months to learn the 2x2x2 rubiks cube, i'm never learning that knot puzzle in a million years !
I had to watch the video at 0.25x speed to assemble it.
Gonna lend it to my friends and see how long it takes before one throws it at the bottom of the Mariana Trench O.o

The "impossible" rope puzzle got nothing on this !! I can do the rope puzzle in 30sec !

I love this puzzle!!
Could you please add some fillet to corner and edge, to make it more comfortable to play with?

I love this puzzle and have already printed it twice in 2 sizes. The bigger one is all one color as I've used the "ALL" file and the other one I printed individually so I can print them in the 6 colors. I would like to make a bigger one with the 6 colors, but the .4mm tolerance makes it very sloppy on my Makerbot Replicator 2+. Is there a way to adjust the tolerances of the 6 individual pieces to print one at a time? The SCAD file only applies to the 6 pieces all at once. I'm new to 3D printing and don't pretend to know a lot about this stuff, but I'm learning. I'm sure there must have been a SCAD file for each piece, and that's what I'm looking for. Or is there a way to adjust the included SCAD file to print the pieces individually, so I can change the tolerance option? Any help would be appreciated! Thanks!

If you open up the file in OpenSCAD, at bottom of the file you can see it's invoking the "printall" module to lay out all of the pieces. Just comment that out and call the piece module that you are interested in. OpenSCAD is pretty easy to get the hang of, and worth learning.

The other option is to export an STL containing all 6 pieces, and use an STL manipulation tool to just cut out the part you are interested in. For example, Slic3r has the ability to take a multi-part STL and separate it (right click on the part and select "split" - you can then save each part separately etc). You can also split parts in netfab and probably a bunch of other tools.

Thank you Lenbok. I tried it and it worked great. That opens up a whole new world for me as I had the same problem in several files, and I think I can figure out how to do it on the other ones too. For the fun of it, I downloaded Slic3r, but haven't installed it yet, but I have several other STL files without a SCAD file that I wanted to do the same thing with. Maybe Slic3r will do the trick. Again, much appreciated!

This is very hard puzzle. I've spend many hours to find solution and finnaly assemble it without any hints. But it was entertaining process. And I am wondering how somebody creates such puzzles.

The solution book that comes with this puzzle has 69 steps to take it apart or put it back together. I have two of them they're made by Thinkfun.

I was gonna print one of these out. Then I saw that animation. 1 minute in I was like "Nope". Then I saw that I was only 1/3 the way throught the solution and I was like "Aw hell nope".

The video shows assembly and disassembly

I have a "real" one of these (e.g. not printed, store-bought). And was going to model it up but alas, I don't have to! This puzzle is so complex! I think getting it back together is probably even harder than getting apart. 8-)

the hell is going on here? i can't even do this with the animation


Awesome puzzle, but seriously, has anyone actually figured this thing out without the animation? I want to know how on earth someone designed this thing.

Do you know how to convert these to vector drawings? This will give more people the possibility to make this puzzle. Like me! Would be great to make this puzzle out of acetal or acrylic.

I have now edited the scad so that all the parts have a 2d equivalent, that you can then export using openscad's export as dxf function (you will probably want to use openscad directly so you can set the size of the pieces independent from the tolerance factor appropriately for your material thickness). And in the case of other files where you don't have a 2d version, you can use openscad projection as described at http://www.gilesbathgate.com/2010/06/extracting-2d-mendel-outlines-using-openscad/http://www.gilesbathgate.com/2...

I have also added a dxf export using the current 8mm thickness, 0.4mm tolerance settings.