Trust me when I say that you must understand the principles of machining before you try to do CNC. And unless you are good with CAD/CAM, you’re going to have to program in G-code too. If the only thing you’re doing with CNC is loading a part, and changing tools, no, you don’t need to know much. But if you want to mill an existing 3D model, you’re absolutely going to need to be a good machinist in order to program CNC.
Trust me when I say that you must understand the principles of machining before you try to do CNC. And unless you are good with CAD/CAM, you’re going to have to program in G-code too. If the only thing you’re doing with CNC is loading a part, and changing tools, no, you don’t need to know much. But if you want to mill an existing 3D model, you’re absolutely going to need to be a good machinist in order to program CNC.