What does it indicate if a CNC machine has "closed-loop control"?

A CNC machine with "closed-loop control" indicates that it continuously monitors its performance and adjusts its commands accordingly to maintain accuracy. This system uses feedback mechanisms, such as encoders or sensors, to measure the actual position and performance of the machine against the programmed commands. If discrepancies arise, the machine can make real-time adjustments to correct any errors, ensuring that the machining process remains precise and efficient.

This capability is crucial in maintaining high levels of accuracy and repeatability in CNC machining applications, as it allows the machine to self-correct for factors like tool wear, thermal expansion, and material inconsistencies. In contrast, open-loop systems do not utilize feedback and are unable to make adjustments based on actual performance, which can lead to increased errors over time.