8 cubes in one AMF file for multicolor print head

thingiverse

This is simply one 10mm cube that I duplicated eight times vertically, keeping the same XY coordinates but incrementing the Z location by ten each time. All eight STL's were then imported into Slic3r and saved as this AMF file. When you bring this into Repetier or another 3D printer controlling software, you can assign different colors to the various objects within this group. You can also delete cube 8, cube 7, cube 6, etc., if you want to make a shorter stick, as seen in the photo. Alternatively, you can scale this group either to make a very short but still ten by ten in the XY, allowing you to create thin layers of color like the rainbow cube. I scaled 0.6 in the X and Y and 0.8 in the Z for most of those color sticks to speed up the print. You can see that I used it to test my color output from my DiamondHotend. The RYB (Red Yellow Blue) color combination is being used, which means I don't have the full gamut of colors that a CYM (Cyan Yellow Magenta) would give. I am simply using the filament I have for now; I'll move to CYM later, as it looks like CYM gives a slightly fuller spectrum. So bring this into Repetier and you'll see that if you have at least eight virtual extruders, you can assign eight different colors to the objects in this group. If all of this is confusing, check out http://www.reprap.org/wiki/Repetier_Color_Mixing. In a nutshell, I used Blender to create a 10mm cube and saved it off eight times at different heights as STL. Then I imported all eight into Slic3r and from there saved as this AMF. If you have Repetier installed, you already have Slic3r; just go ahead and create a launch shortcut for it.