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Dodecahedron

by nophead, published

Dodecahedron by nophead Nov 25, 2008

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Dodecahedron by nophead is licensed under the Creative Commons - Attribution license.

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Summary

A regular polyhedron with twelve pentagonal faces. This one is about about 25mm high and is hollow. See hydraraptor.blogspot.com/2008/11/dodecahedron.html.

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Print it and play with it.

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I love this design, but I seem to be having some issues with my hardware. It prints somewhat smaller? in the first 32ish layers, but then fixes itself. I just got and assembled this ToM and I'd like to get this problem figured out because it seems to happen on every print (though it's harder to see in the calibration cube)

I've gotten one good print of this, but often when it tries to "fill" the walls, I get too much plastic, which gets pushed around and leaves globules. Sometimes these harden and get in the way, so that the stage gets hung up the next time the nozzle meets them, and the whole pattern gets offset. Anybody have ideas on how to avoid this? I've tried reducing the Fill...infill solidity and increasing the Speed...Feedrate, but they haven't helped.

Thanks!

(Otherwise, a very nice model, one that demonstrates the machine nicely.)

What machine are you using and what software?

Makerbot Cupcake CNC - version 10, I believe (purchased summer, 2010), using a Makerbot extruder v.4. I am running ReplicatorG 0019 on MacOSX. All firmware is up-to-date. Thanks!

If it only happens with thin walls then it can be because the outline is coming out thicker than Skeinforge thinks or it can be too much infill perimeter overlap.

Check that "Perimeter Width over Thickness" is the same as "Infill Width over Thickness" and "Infill Perimeter Overlap" is 0.15 or less.

Ok. I found "Infill Perimeter Overlap" - it was 0.15, but I am about to try 0.1, instead. However, I don't know where "Perimeter Width of Thickness" and "Infill Width over Thickness" are - what category (e.g. "Fill" or "Oozebane") are they in?

Carve and Fill. I always use 1.5.

I'm finally getting back to this.

I found "Extrusion width over Thickness (ratio)" in Carve, but the closest I could find in "Fill" is "Interior Infill density over Exterior Density (ratio)." Is that what you meant? (Or did you mean "Infill solidity"?

No "Infill Width over Thickness" in Fill. Perhaps you don't have that in the version you are using.

No, I don't see it. I am running ReplicatorG v. 0019 on Mac OSX.

I scaled this up significantly in Replicator G 18, and I can't believe that the top didn't sag!

Does anyone know the setting in Skeinforge to randomize the "turning point" on each layer, so you don't end up with a vertical line on which ALL the layers have a bump?

I know i read about it somewhere, but I can't seem to remember where it is :'(

It's a module called jitter I believe.

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