I'm a TIG noob so I can not explain what happened today, and google didn't help. I was welding aluminum, using the pedal, and when I released the pedal the arc did not stop. It acted like I was still lightly pressing the pedal, doing the cleaning action. What would cause this?
Does your machine have an automatic function to ramp the current down? I was always taught to gradually pull current, not just snap it off suddenly, so maybe yours does it automatically?
In reply to Tom Suddard :
Hmmm, is that the "Down Slope" setting? I didn't intentionally change that setting but maybe it got bumped when I put everything away the other night.
is it in 2T when it should be in 4T, or vice versa?
Basically, thumb switch (ON/OFF) or foot pedal.
In reply to AngryCorvair (Forum Supporter) :
Yes, that would do it.
Junk pedal rheostat is a possibility as well if you don't find an adjustment on the front of the machine that fixes it.
I have to periodically clean my foot pedals, and one still hangs occasionally. Giving it a toe tap on the heel end shuts it off when it misbehaves.
Today it's acting normal, but my work piece is grounded more securely.
In reply to AngryCorvair (Forum Supporter) :
I was thinking operator error.
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