CNC Cutting Machine 2025 – 400 Free Practice Questions to Pass the Exam

The role of a CNC controller is primarily to interpret G-code instructions and control machine movements. G-code is a standardized language used to command CNC machines, detailing how the machine should move, at what speed, and what tools need to be used for specific operations. The controller reads these commands and translates them into specific actions, precisely orchestrating the movements of the machine's cutting tools to perform the required tasks.

This function is crucial because it ensures accuracy and repeatability in the machining process, allowing for complex designs and high-quality finishes that would be difficult to achieve manually. The CNC controller effectively acts as the brain of the machine, enabling it to execute detailed operations in a fast and efficient manner.

While options that involve manually cutting materials, providing power to the spindle, or setting up operational parameters each play a role in the overall operation of a CNC machine, they do not encapsulate the core function of translating and executing instructions, which is fundamental to CNC technology.