Steampunk Deathstarfish

by YourLaser, published

Steampunk Deathstarfish by YourLaser Dec 31, 2012

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Steampunk Deathstarfish by YourLaser is licensed under the GNU - GPL license.

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A simple modification to Crab's excellent Eiffel-style sphere

The original circular joining plates are replaced by starfish-shaped plates. This makes the completed sphere look more like a mesh of straight girders and less like a surface covered in circles.


Follow the instructions for Crab's original. Just swap these starfish plates for the original circular plates.

It's drawn to cut from 3mm MDF.

You need to cut:
24 5-way joiners
40 6-way joiners
60 short 2-circle girders
30 long 3-circle girders
(spares as needed)

Glue is optional, but use superglue after assembly if you need to. Assembly is basically routine and simple, but does need a light touch – the parts will break easily if squeezed at the sides. It takes me about an hour to assemble one.

I start at the bottom and work round evenly in circles. I fit the inside plate at each junction, then the girders, then the outside plate, then squeeze all the joints carefully home. Check before squeezing tight! It's probably impossible to dismantle one without damage.
Remember these rules:

  • All sides of the 5-way joiners need 2-hole girders
  • All triangles are made of two 2-hole girders and one 3-hole girder.
  • All 6-way joiners have three 2-hole girders and three 3-hole girders.

I finish off by making a 'cap' of six triangles as a separate piece, then adding that to the almost-completed sphere. It gives more working space than trying to fit one last plate.

Files are produced for CorelDRAW X5. My machine is an Epilog 36EXT 75W, but isn't in perfect tune as yet and so takes about an hour and a half to cut a complete sphere.

Thanks Crab, I love your original!

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This name cracks me up!

Sorry, I know nothing of STL files. It should be quite easy though to take these 2D designs, then extend them into 3mm thick solids as STLs.

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Could you possibly do .stl files? I wanna 3D print this on my printrbot.

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I've uploaded a PDF version, as the simplest and most portable. I've also re-uploaded the CDR, as there were a couple of poorly closed lines that gave problems on the PDF export (cut OK though).

Thanks for the pdf! I converted it to a .dxf and loaded it into Solidworks, but sadly the lines are all over the place (intersections, open loops), so there's no way to extrude it into a solid, printable file.

I guess it will be limited to laser cutters only...

Hi, thanks for your interest.
I used CorelDRAW because it's an Epilog laser and Corel is seemingly unavoidable with Epilogs, owing to the way the printer driver works. I even had to buy a new laptop to run Windows, just to drive the laser! I'd love to be using .svg (Inkscape et al), but Corel / SVG / Inkscape seems to be very, very buggy - not quite sure which end the fault is at.

These are only simple files though, so I'll certainly turn them into some other formats.

I've been wanting to make this for some time... but like your design much better... however I have X4. Can you also post as an EPS or say... X3 file.. for us older folks? Happy New Year

May i ask for a open format, like .svg? If you have the option, .dwg would also work for most of us, i'd say.
Only a couple people have CorelDraw, so a different file formal would greatly enhance the makeability (is that a word?) of this thing.
Thanks and a happy new year!