Step 1: Understand feed drives in CNC milling.
In CNC (Computer Numerical Control) milling machines, the feed drives are responsible for controlling the movement of the tool or workpiece along the axes. These movements require motors with precise control.
Step 2: Identify the correct motor type.
- Servo motors are commonly used in CNC machines for their precise control over speed and position. They are ideal for applications where accurate movement is required.
- Other motor types like Induction motors, Stepper motors, and Synchronous motors are less commonly used for feed drives due to their lower precision.
Step 3: Conclusion
Therefore, feed drives in CNC milling are provided by servo motors.
Final Answer:
\[
\boxed{\text{Servo Motors}}
\]