Machine controller (PLC)

A machine controller (PLC, short for Programmable Logic Controller) is a component designed for industrial automation and process control. In other words, it is the 'brain' of the machine. It is used across various industries to automatically control machinery processes and systems. PLCs are heavily utilized in manufacturing, where it is necessary to monitor and control mechanical devices such as CNC machines, robots, and other parts of production lines.

A PLC system typically includes:

Input: Responds sensitively to various signals (e.g., switches, sensors, buttons).

Processing: Uses programmed logic to determine how to respond to inputs.

Output: Sends signals to controlled devices (e.g., motors, actuators, indicator lights).

The PLC has its own software that allows the user to create and edit automation processes, typically using various programming methods such as ladder logic or structured text. Generally, milling machines operate based on text-based G-code.