Contest Ended, Winner(s) have been selected.
Design two symmetrical Rhombicuboctahedrons (Rohm' for short) for printing on Prusa 3D MK2.
The 1st Rhom' needs to be made of 2 parts that can be connected to form the complete shape.
The width of the Rhom' should be 100nn from face to face.
Each edge of this Rhom' needs to have a 5mm high 'fence' sticking outward.
Two inner benches or plates need to be constructed in the inner space of each of the halves.
The 2nd Rhom' is also made of 2 parts but without fences and without benches. It is a simple Rhom'. It needs to fit exactly on the 1st Rhom' from the outside. so that the 1st Rohm' go inside the second one.
The attached jpg and max files depict the 1st Rhom'. However the max file is full of mistakes and should not be used as anything but as a general reference. Nor the 'fences' need to be constructed as V shape as in the max files.
Please ask me anything which is not clear.
The resulting gcode file must be designed and tuned for Prusa 3D MK2 including proper support etc, and needs to print without problems on Prusa MK2.
Don't Wants:
3D file that does not print well on Prusa
  1. 3D Studio or solid and simplify 3D.


1st Winner
#22 Final changes by handsketcher
All the changes are added. STL file names may need to be changed when you import them to printing software. I used thickness value in the file name like "0.9mm". The dot in the file names may not accept by some softwares.
If all these are acceptable then I'll upload solidworks files in another submission.
Mar 21, 2017 22:44
#9 New Outer Rhom- Updated by GKG
Have the updated 3d design ready for printing now.

Mar 14, 2017 9:56
You have STL files of both top and bottom attached. The parts have a 2mm wall thickness and per your dimensions.
Neither of these two parts should require supports to print. I'm not real clear on the "fence" profile that is wanted.
Mar 13, 2017 23:45
#3 Rhombicuboctahedron by Ivan Zerpa
Working. 3d model with the measurements you need
Please give me your feedback.
Mar 14, 2017 1:55
#4 External and internal Rhombicuboctahedron by Ivan Zerpa
Ready to print
Internal and external piece 2mm thick
IGES and STEP neutral files
Files to print STL
I'm here to help you.
my best regards
Mar 14, 2017 2:58
#5 Rhombicuboctahedron by GG Designs by GKG
Hello gar996756,
This model is accurate for 3d printing straight after download.
Wall thickness maintained as per requirements.
5mm Fence also prints well with no problems.
Bench is designed inside both halves and also a non-bench version is included if required.
Rom1 fits exactly inside Rom2
Rom upper and lower halfs have lips(grooves at the edge) for easy and tight fixing both into one piece.
Model is 3d printing ready. Let me know if you need more customization.
Mar 14, 2017 4:46
#6 3d-Printing STL files and G-Code with proper supports designed by GKG
This model is the 3d -printing version of my design. I have considered the support structures, G-Code, optimized for 3d printing on PRUSA printer.
Mar 14, 2017 6:52
#7 Rohm Design by Mahbub
Please check the attached images for details. I have the Prusa i3 MK2 3d printer and I know the best solution for this project. Thanks
Mar 14, 2017 8:44
#8 Rohm Design by Mahbub
Edge removed from 2nd Rohm. Thanks
Mar 14, 2017 8:57
#10 Rhombicuboctahedron updated by Ivan Zerpa
Now obj file included
Thickness: 2 mm
width of the Rhom 1 = 100 mm from face to face.
Rhom 1 fences = 5 mm high
See the file that is compressed WinRar
I am always at your disposal , to help you.
my best regards
Ivan Zerpa
Mar 14, 2017 13:48
#11 ROHM 1ST VERSION by Adam
Mar 14, 2017 15:56
#12 Two Rhombicuboctahedra by Adam B.
Two rhombicuboctahedra where one can neatly insert within another. The assembly model is named Rhombicuboctahedron.
Mar 14, 2017 22:11
#16 Complete Rohm design by MAINAK MITRA
Rohm design ready to 3d print in prusa 3D MK2. Please give feedback.
Mar 15, 2017 23:44




Mon, 27 Mar 2017 22:27:00 +0000
@Gary, Thank you..
Sun, 26 Mar 2017 16:25:32 +0000
looser adam.....afraid of others design which he can not see...lol



Thu, 23 Mar 2017 03:10:14 +0000
People that don't show their design typically are copying someone elses.

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