Duty Cycle refers to

• A. the amount of time an operator spends controlling a robot
• B. whether an engineer works first, second, or third shift
• C. a robot task or duty to be completed in one hour
• D. the percent of time a drive is in operation.

Answer: (D)

Duty cycle is the fraction of time a device is actively powered within a defined period. In robotics, it’s the percentage of on-time over the total cycle time, which matters for heat and wear since components have thermal limits. The description that refers to the percent of time a drive is in operation captures this idea. For example, if a motor runs for 15 seconds in a 60-second cycle, the duty cycle is 25%. The other descriptions focus on human control time, shift work, or simply completing a task within an hour, which aren’t about how long the drive stays energized in a cycle.