In contrast, Computer Numerical Control machines are used to create custom-designed parts and products at a component level. They use CNC programs developed for particular applications, mainly to control specific multi-axis machine tools like a milling machine, lathe, punch press, or a tube bending machine. Also, the CNC controller is normally a purpose-built controller that could be anything from a general purpose computer or a Programmable Logic Controller (PLC). This means that you can use a PLC in a CNC machine system. In such cases, the PLC is interfaced with the Machine Control Unit to handle all logical operations of the CNC system.
A PLC-controlled CNC machine can realize complex motion sequences that involve multiple sensors and actuators. The CNC machine control unit can also use the PLC to process input signals from a user interface or certain input devices and to realize safety and monitoring functions. But you cannot use a CNC controller in a PLC system
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