I have an Econotig that I purchased used on CL for $500.
Problem statement: Using the foot contol I have un-reliable current control. Some times the foot current control works as expected for 10 or 15 seconds, then it seems to go to full current. Other times it only takes 2 or 3 seconds for the machine to jump to full power. Once it jumps to full curent I need to let off an re-start the arc to re-gain control. This problem appears to occur under DC or AC power settings. I have sprayed contact cleaner on connectors and wiggled things around under the cover. The unit came with two 5 pin foot contols, both act the same way. The amperage setting dial on the machine seems to work fine.
I have seen people report similar issues, but usually they have no variable current control at all. Either full current or minimum current.
Any one have a suggestion?
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