What exactly is the difference between cnc machining and 3d printing, in layman's terms, 3d printing is a kind of additive technology and cnc machining is a kind of subtractive technology, in terms of material

CNC 加工工艺要点（一）切削参数优化加工阶段刀具类型主轴转速（r/min）进给速度（mm/min）切削深度（mm）冷却方式粗加工 平底立铣刀 4000