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Which of the following describes a function of the MCU?

  1. Deletes previous commands

  2. Sends motion commands to amplifier circuits

  3. Generates the mechanical structure of a CNC

  4. Controls the power supply directly

The correct answer is: Sends motion commands to amplifier circuits

The function of the MCU, or Microcontroller Unit, in a CNC cutting machine primarily involves sending motion commands to the amplifier circuits. This process is crucial for translating the programmed movements into actual physical actions performed by the machine. The MCU takes input from the operator or from a pre-written program and processes this information to determine the necessary motions required for cutting operations. By sending these commands to the amplifier circuits, the MCU controls the servos or stepper motors that drive the machine's moving parts. This action allows precise control over motion, including speed, direction, and positioning, ensuring that the cutting process adheres to the specified design and tolerances. This role of the MCU is fundamentally important for the automation and precision of CNC machines, as it ensures that the physical components operate in sync with the digital instructions provided by the user or the design software.