Which component interprets numerical data and controls movement in CNC machines?

Which component interprets numerical data and controls movement in CNC machines?

• A. Central Processing Unit (CPU)
• B. Machine Control Unit (MCU)
• C. Controller
• D. Servo Drive

Answer: (B)

The Machine Control Unit acts as the brain that reads the CNC program (G-code), interprets numerical data such as coordinates and feed rates, and performs the motion planning and interpolation needed to produce the desired toolpath. It then generates the motion commands for each axis and sends them to the servo drives, which power and position the motors accordingly. The servo drive itself only amplifies and regulates the motor output; it doesn’t interpret the program. The CPU is the processing element inside the unit, but the complete function—interpreting data and coordinating movement—is carried out by the Machine Control Unit.

The Machine Control Unit acts as the brain that reads the CNC program (G-code), interprets numerical data such as coordinates and feed rates, and performs the motion planning and interpolation needed to produce the desired toolpath. It then generates the motion commands for each axis and sends them to the servo drives, which power and position the motors accordingly. The servo drive itself only amplifies and regulates the motor output; it doesn’t interpret the program. The CPU is the processing element inside the unit, but the complete function—interpreting data and coordinating movement—is carried out by the Machine Control Unit.