Final answer:
The duty cycle for a welding machine is calculated on a minute time period. It refers to the percentage of time that the machine is actively welding.
Step-by-step explanation:
The duty cycle for a welding machine is calculated on a minute time period. The duty cycle refers to the percentage of time that the machine is actively welding. For example, if a welding machine has a duty cycle of 60%, it is actively welding for 60% of the total time period.