CNC Cutting Machine Practice Test

What action do drive motors perform in a CNC drive system?

1. They stabilize the entire system

2. They rotate ball or lead-screws to position the machine table

3. They initiate the programming code

4. They provide feedback to the MCU

The correct answer is: They rotate ball or lead-screws to position the machine table

The role of drive motors in a CNC (Computer Numerical Control) drive system is crucial for the accurate positioning and movement of the machine components. These motors are responsible for rotating ball-screws or lead-screws, which in turn translates into linear movement of the machine table or other parts of the CNC machine. When a CNC program is executed, the processing unit sends signals to the drive motors to move according to the specified coordinates and speed dictated by the programming code. This rotation of the screws generates precise movements of the machine's working parts, ensuring that cuts or adjustments are made accurately based on design specifications. In this context, the other actions listed do not accurately describe the primary function of drive motors. While stabilization of the system is important, it is typically the responsibility of other components, like the frame and support structures. The initiation of programming code is performed by the control unit, not the drive motors themselves. Similarly, feedback mechanisms are generally managed by sensors and feedback systems, rather than the motors, which simply respond to the commands they receive without processing information back to the central unit. Thus, the primary function of the drive motors in a CNC system is indeed to rotate the ball or lead-screws, positioning the machine table with precision