Your welder has a 60% duty cycle at 200 amps. Or a 30% duty cycle at 130 amps. What exactly does this mean?
It is the percentage of arc time you can have in 10 minutes. For instance, lets say what a welder has a 40% duty cycle at 150 amps. I am burning 1/8" 7018 at 150 amps. How long can I weld, before I must let the welder cool down.
10minutes (times) 40% (equals) 4 minutes.
I can weld for four minutes before I have to stop. When you stop welding to let your machine cool, DONT TURN IT OFF just let it sit there and run, and let the fan do its job.
Or another example. My plasma cutter has a 50% duty cycle at 45 amps. I can cut for 5 of 10 minutes, but they dont have to be 5 continuous minutes. I can cut for 30 seconds here, 40 seconds there, 10 seconds over yonder, etc, just as long as I dont exceed a total time of over five minutes in a ten minute period.
But check this out, as the amperage decreases, the duty cycle increases. Less amperage means less heat, so the welder will heat up slower, if at all. My stickmate has a 100% duty cycle at 80 amps, which means I could literally weld all day at 80 amps without stopping. Well, hypothetically of course.
Maxed out at 235 amps however, it only has a 20% duty cycle, so I could only burn rod for two minutes if I really had to burn it in on some thick steel. 100 amps, would be somewhere between 100% and 20%. Most manufactures will offer a chart on their website of the duty cycle of your machine, that will tell you the duty cycle at any given output.