Currently, RoBo prints in both PLA and ABS filament if you order the upgraded version RoBo 3D Printer under rewards.
RoBo uses 1.75mm diameter filament.
.STL files are loaded into the software and are sliced into layers with the Slic3r program.
We like to use REPETIER-Host to control and print our objects, Any open source 3d printing software is functional with RoBo also, such as pronterface. You can download these programs for free off the internet.
By the end of our funding date, we will have put up assembly and calibration videos online (most likely YouTube). Assembly takes around 45 minutes and well show you how to do it.
Yes the ABS option prints both kinds of plastics. It comes with a heated bed all wired and ready to go to allow you to print with both plastics.
Don't see the answer to your question? Ask the project creator directly.