Badog SpiroGraphic CNC DXF Writer - Version 1.02 Badog SpiroGraphic CNC DXF Writer allows you to easily add standard or complex geometric shape designs and functions to your CNC project. The models exported are standard DXF models that can be added to your assembly drawing or 2D entities. You can also automatically import the DXF into the Badog Software and cut yourself the functions or lines you made. It is like having a virtual quick and easy Function generator on your computer that can create real and precise geometry which simplifies g code..