Apparently Impossible Sphere
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Published on June 12, 2012
Derived from
Apparently Impossible Cube
by richgain
Description
This is a derivative of the apparently impossible cube puzzle. While a Cube is cool a sphere is much cooler. I take no credit for the original design from which this was derived.
I didn't have to original model used so I grabbed the impossible cube STLs and unioned them with a sphere (as appropriate).
I didn't have to original model used so I grabbed the impossible cube STLs and unioned them with a sphere (as appropriate).
Instructions
Print two "s1" parts and two "s2" parts on your well calibrated 3d printer. (I printed in .3 height 10% infill on my ToM)
You may need to clean up any little blobs.
This solves the same way as the cube it's a little harder due to not being able to set it on a flat surface.
I recommend scaling this up a little bit after printing it myself. Unless you have tiny hands it's challenge to put together at the size posted.
Check ou derivative: thingiverse.com/thing:25395 - Open Scad Source (works w/ cube and sphere). It fits together a little tighter and as a result is a little more fiddly to put together. If your printer isn't well calibrated print mine LOL.
You may need to clean up any little blobs.
This solves the same way as the cube it's a little harder due to not being able to set it on a flat surface.
I recommend scaling this up a little bit after printing it myself. Unless you have tiny hands it's challenge to put together at the size posted.
Check ou derivative: thingiverse.com/thing:25395 - Open Scad Source (works w/ cube and sphere). It fits together a little tighter and as a result is a little more fiddly to put together. If your printer isn't well calibrated print mine LOL.
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License
Apparently Impossible Sphere by UechiMike is licensed under the Attribution - Creative Commons license.
Hi Mike
I just made your design this week's RepRap competition of the week http://forums.reprap.org/read.....
Hope you approve. Look forward to seeing some nice copies!
The dimensions might be slightly off - I eyeballed it in Opescad with the STL files you posted up. I don't have a program that does dimensioning installed so I lined them up the best I could and unioned them with a sphere. It could be my dimensions were off slightly resulting in the less than perfect fit. Mine came out pretty good - but it's small and did require a little clean-up with sandpaper on a couple of the faces. I like your write-up! Keep up the good work. My ToM is down right now. About 6 mos ago I dropped my HBP and snapped off the connector...and did a less than optimal repair. It finally broke loose again resulting in almost melting the connector when it shorted. Fortunately I have a spare HBP - I just need to mount it and get it leveled out...unfortunately it's slightly warped and causing me some issues.