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電腦數值控制 工具機
      數控工具機是指可以通過計算機編程，進行自動控制的工具機。
 將程式指令輸入數控系統之記憶體後，經由電腦編譯計算，透過位移控制系統，將資訊傳至驅動器以驅動馬達之過程，來切削加工所設計之零件。
      電腦與數控工具機之間利用並列訊號線接續，再利用數控工具機的軟體來控制加工。數控工具機軟體則用來產生G-Code(機能指令)，
將路徑碼送至數控工具機控制器,，然後數控工具機控制器送出命令來驅動主軸(Z軸)馬達及滑台(XY軸)馬達開始加工。
加工流程：
(1) CAD：Computer Aided Design,即計算機輔助設計。2D或3D的工件或立體圖設計。
(2) CAM：Computer Aided Manufacture，即計算機輔助製造。使用CAM軟體生成G-Code。
(3) CNC：數控工具機控制器，讀入G-Code開始加工。
加工程式：
CNC程式可分為主程序及副程序（子程序），凡是重覆加工的部份，可用副程序編寫，以簡化主程序的設計。
 字元（數值資料）→字語→單節→加工程序。
 只要打開Windows作業系統裡的記事本就可編輯CNC碼，寫好的CNC程式則可用模擬軟體來模擬刀具路徑的正確性。
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典型數控工具機外觀，加工區域位於機台體內 (Small CNC Turning Center)
(電腦數位控制) Computer Numerical Control (CNC)
Numerical Control (NC) refers to the automation of machine tools that are operated by abstractly programmed commands encoded on a storage medium, as opposed to controlled manually via handwheels or levers, or mechanically automated via cams alone. The first NC machines were built in the 1940s and 1950s, based on existing tools
that were modified with motors that moved the controls to follow points fed into the system on punched tape. These early servomechanisms were rapidly augmented with analog and digital computers, creating the modern computer numerical control (CNC) machine tools that have
revolutionized the machining processes.
        In modern CNC systems, end-to-end component design is highly automated using computer-aided design (CAD) and computer-aided
manufacturing (CAM) programs. The programs produce a computer
file that is interpreted to extract the commands needed to operate a particular machine via a postprocessor, and then loaded into the CNC
machines for production. Since any particular component might require the use of a number of different tools—drills, saws, etc., modern machines often combine multiple tools into a single "cell". In other cases, a number of different machines are used with an external controller and human or robotic operators that move the component from machine to machine. In either case, the complex series of steps needed to produce any part is highly automated and produces a part that closely matches the original CAD design.