Quote Originally Posted by performance View Post
Running your welder to the duty cycle is like running your car to the redline in the temperature range and then letting it cool off. Do that routinely and intentionally and you will have a car and welder with issues.
That's really what I was wondering. "Is the thermal shutdown point the red-line, or is it some point less than that?" Seems like I've got my answer. Maybe I should invent a "duty cycle timer". It could sense the arc and count how many minutes out of ten you have been welding, and tell you when to stop. I'll be rich!