LPKF Proto-Mat S103 Milling Operation Instructions
If you are making a PCB, use the PCB instructions (Section 8). If not, follow the 2.5d milling instruction (Sections 1-7). There are 2 main ways to perform a 2.5d milling operation. Either as 2d (.dxf) file or a 3d (.stp) file. Which to pick is largely dependent on the complexity and geometry of your part.