Hi
You need to convert the drawing to .stl . It's easier if you use Autodesk Inventor. Once you hace drawn ,you need to save it in SAVE AS, then a new window is going to appear. In the bottom of the window you will have all the configurations to save your draw. You only need to choose the .stl extension.
I hope this information helps you. sorry for my english but im learning.
Atte. Capilla
INGENIERO EN MECATRONICA.