Which component of the NC system interprets the program and coordinates motion?

Which component of the NC system interprets the program and coordinates motion?

• A. Spindle
• B. Machine Control Unit
• C. Sensor
• D. Operator

Answer: (B)

Interpreting the NC program and coordinating motion is the job of the machine control unit. This is the brain of the CNC system: it reads the program (the sequence of commands like moves, feeds, and spindle speeds), decodes what must happen, and then plans and sends the exact commands to the drives that move the axes and control the spindle. It ensures the toolpath is followed accurately, coordinates multiple axes in sync, and adjusts timing, feed rate, and spindle speed as required. The other parts play different roles: the spindle provides the actual cutting power and rotation; sensors give feedback to verify position and speed but don’t interpret the program on their own; the operator starts programs and handles setup, but automatic interpretation and coordination come from the machine control unit.

Interpreting the NC program and coordinating motion is the job of the machine control unit. This is the brain of the CNC system: it reads the program (the sequence of commands like moves, feeds, and spindle speeds), decodes what must happen, and then plans and sends the exact commands to the drives that move the axes and control the spindle. It ensures the toolpath is followed accurately, coordinates multiple axes in sync, and adjusts timing, feed rate, and spindle speed as required.

The other parts play different roles: the spindle provides the actual cutting power and rotation; sensors give feedback to verify position and speed but don’t interpret the program on their own; the operator starts programs and handles setup, but automatic interpretation and coordination come from the machine control unit.