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CNC software is developed to augment the capabilities of a particular machine tool.
CNC 的提高可以提高特殊车床的能力。
The general configuration of a computer numerical control system is pictured in Fig.2.5.
电脑数控系统的大体配置如图2.5 所示。
As illustrated in the diagram, the controller has a tape reader for initial entry of a part program.
如图中所示,最初进入控制器的是磁带播放机。
In this regard, the outward appearance of a CNC system is similar to that of a conventional NC machine.
这样,CNC 的外部系统与传统的NC机相似。
However, the way in which the program is used in CNC is different.
然而CNC 中的程序使用方法是不同的。
With a conventional NC system, the punched tape is cycled through the tape reader for each workpart in the batch. The MCU reads in a block of instructions on the tape, executing that block before proceeding to the next block.
与传统的数控系统比,纸带通过纸带阅读机对每个批次的工件循环。MCU读取磁带上的指示块,执行该块,然后进行下一个块。
In CNC, the entire program is entered once and stored in computer memory.
在数控中,整个程序一旦进入并储存在电脑的存储器中。
The machining cycle for each part is controlled by the program contained in memory rather than from the tape itself.
每个零件的加工周期控制在内存中,而不是来自磁带本身的程序。
Control algorithms contained in the computer convert the part program instructions into actions of the machine tool (or other processing equipment).
在计算机中的控制算法转换成机床或其他加工设备的行动的一部分程序指令。
Certain functions are carried out by hard-wired components in the MCU.
MCU中进行硬连接组件的某些功能。
For example, circular interpolation calculations are often performed by hardwired circuits rather than by stored program. Also, a hardware interface is required to make the connections with the machine tool servo systems.
例如,圆弧插补计算往往是通过硬连接的电路,而不是由存储程序执行。另外,硬件接口需要与机床伺服系统连接。
