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Yes, you can increase duty cycle by operating in a cooler environment. Only to a point though, X amount of amps still creates Y amount of heat. I think duty cycle is figured at 70 degrees or so.
I agree for the first cycle. (Alert useless information follows) Just like many of the dinosaurs which were formerly thought to be cold blooded reptiles are now considered warm blooded because they lacked the surface area versus body mass to dissipate enough heat to to be cold blooded the components in your welder will reach their limit of dissipation also and overheat and thereby self-destruct if not prevented by thermal protection. Judicious application of heat sinks(if you could identify the proper components and reach them) coupled with the use of fans to move more air could extend your duty cycle. It might be a short term strategy in an emergency but if you need to weld at a capacity past the specs of your machine more than very rarely you need to get a more powerful machine.
Last edited by Meltedmetal; 02-22-2013, 06:57 AM.