What part of an NC machine transmits the instructions to the drive system and machine tool through a hard-wired electrical circuit?

What part of an NC machine transmits the instructions to the drive system and machine tool through a hard-wired electrical circuit?

• A. Servo Motor
• B. Machine Control Unit
• C. Operator Console
• D. Spindle

Answer: (B)

In a CNC system, the part that sends the programmed instructions to the drives and the tool through fixed wiring is the machine control unit. It reads the program (like G-code), interprets the required axis moves, and outputs the appropriate control signals to the servo drives that power the motors and move the axes and spindle. The hard-wired path is essential for fast, reliable, real-time control of motion. The servo motor is the actuator that actually moves, but it receives its commands from the drive, not directly from the program. The operator console is just the human interface for input and monitoring, not the real-time transmitter of motion commands. The spindle is the rotating cutting tool and is driven by the spindle drive, not by direct program signals from the control unit.

In a CNC system, the part that sends the programmed instructions to the drives and the tool through fixed wiring is the machine control unit. It reads the program (like G-code), interprets the required axis moves, and outputs the appropriate control signals to the servo drives that power the motors and move the axes and spindle. The hard-wired path is essential for fast, reliable, real-time control of motion.

The servo motor is the actuator that actually moves, but it receives its commands from the drive, not directly from the program. The operator console is just the human interface for input and monitoring, not the real-time transmitter of motion commands. The spindle is the rotating cutting tool and is driven by the spindle drive, not by direct program signals from the control unit.