机械设计制造及其自动化之计算机数控 CNC

什么是数控?
CNC是"计算机数值的控制"的缩写， 是一台计算机怎样控制一台铣床让它运作来加工设计的零件。 它使用的语言被称为"G代码"，是一系列指令，结合X，Y 和Z坐标指示的方向，速度还有零件的形状的剪切点。在过去，例如，即使最熟练的机械师也不能解决一个切圆的问题，因为X 和Y两个轴手动摇动时，必须要同时同速才能完成。 然而计算机就可以毫不费力的做到，并且一个错综复杂的形状都可以很轻松的加工出来就像加工一条直线一样容易。CNC的优势是不管是多困难的形状，只要能画出图形，就能加工3D立体造型，而且多个相同的部分可以迅速的用模板加工出来。

CNC
What is CNC?
CNC is short for “Computer Numeric Control” which is how a computer talks to a milling machine to control its movements to cut the part you design. The language it uses is called “g-code”, which is a series of instructions that, combined with X, Y and Z coordinates denotes direction, speeds and key points of the shape to be cut. In the past, for example, even the most skilled machinist would have a problem cutting a circle because both the X and Y handwheels would have to be cranked at the same time at constantly varying rates at the same time. The computer, however, has no trouble doing this, and a complicated shape can be cut just as easily as a straight line. The advantage of CNC beyond cutting difficult 3D shapes is that once the program is written and the holding fixtures made, multiple identical parts can be made rapidly.

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