Hey! This thing is still a Work in Progress. Files, instructions, and other stuff might change!

2 Color Pocket Coin-op

by br3ttb, published

2 Color Pocket Coin-op by br3ttb Sep 17, 2011
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This is an experimental part designed to be tested on the 2 color extruder at Maker Faire. Come check it out!

you are going to Maker Faire aren't you?

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So this is how it's done? 2 mutually exclusive color meshes? What if there's overlap? What if the tolerances are too high? Or not high enough? It seems so... touchy. But then I can't think of any other way.

Looking at the STL's I'm going to guess that the 2 files are sliced separately and then the 2 g-code files combined with adjustment for printhead offset and instructions are sent to the 2 different extruder axies. Multi colour printing using STL files always was going to be a hack seeing as the file type doesn't support colour.

I wonder if the combining tools are smart enough to detect intersecting models...

That is exactly how it is implemented. The tools do not yet defect things like overlap (it might be intentional for all it knows).

I wish I were going to Maker Faire!

How does the two color work? What in the .stl tells the printer to switch?

Nothing. STL files really don't have any extra data that can be used for that, so right now it is up to the user to make sure the STLs are exclusive to each head. Overlapping is not protected, in case you want to fuse plastics.