Final answer:
In CNC machine tools, the rotation of the drive motor rotates the ballscrew, which converts rotary motion into linear motion.
Step-by-step explanation:
In CNC machine tools, the rotation of the drive motor rotates the ballscrew. The ballscrew is a mechanical device that converts rotary motion into linear motion. It consists of a threaded shaft (ballscrew) and a nut with small ball bearings. As the drive motor rotates the ballscrew, the nut moves along the shaft, producing precise linear motion.