What must be monitored when using a machine like a curving roller?

Monitoring the capacity of a curving roller machine is essential because it directly relates to the machine's ability to perform effectively without risking damage or failure. The capacity indicates the maximum load or material thickness that the machine can handle safely. If the machine is operated beyond this limit, it can lead to mechanical failure, safety hazards, or compromised work quality. Understanding and adhering to the indicated capacity ensures proper operation and helps maintain the integrity of both the machine and the materials being processed.

While other aspects, such as noise levels or the number of operators present, are important for safety and operational efficiency, they do not have the same direct impact on the fundamental capability and safe operation of the machine as its capacity does. Similarly, the color of the machine is not a functional factor affecting its operation.