In both commercial and self-developed platforms, mechanical movements of substrate and dispensing head(s) are achieved through computer controlled stage. In printing process, a digital 3D model can be converted into multiple layer data (STL files), and then these data will be interpreted into driving signals to stage driver motors through the regulated controller.The same procedures of moving and dispensing are repeated for each layer with its own characteristic shape and dimensions.The combination and consolidation of these layers forms a complete 3D object.