Interesting adaption of a DIY CNC machine to 3D printing by the replacement of a milling head with an extruder.

Remember, if you create a design and generate G-code with a program like Slic3r, then the code will make the extruder move upwards from Z = 0. If you run the same design through a G-code generator for CNC work, then the head will move from +Z to Z = 0.

Old Man Emu