CNC Cutting Machine Practice Test

What is the primary advantage of an open loop CNC system?

1. High precision

2. Lower cost with no sensors required

3. Higher load capacity

4. Reduced complexity in programming

The correct answer is: Lower cost with no sensors required

The primary advantage of an open loop CNC system is its lower cost due to the absence of sensors. In an open loop configuration, the system does not rely on feedback from the machine's operations to make adjustments. This means fewer components are needed, such as sensors, encoders, and complex feedback controls. As a result, the overall system is simpler and less expensive to manufacture and maintain. This reduction in complexity and cost makes open loop systems particularly appealing for applications where high precision and feedback are not critical requirements. In contrast, other systems such as closed loop CNCs tend to offer enhanced precision and load capacity due to their ability to monitor and adjust to any deviations in position or load. However, this comes at the expense of added complexity and higher costs associated with the sensors and control mechanisms. While reduced complexity in programming could also be seen as an advantage, the lower cost directly relates to the elimination of the need for elaborate sensor systems, making it the primary advantage of open loop systems.