I have a PowerPro 256, and have been using it successfully since last June. Tonight I went out to weld, and I can't get an arc. I even tried to strike an arc on the ground clamp, and I just get a tiny little spark, but no arc.
Wired for 220v 50A
Settings are:
TIG/HF
no pulse
DCEN
all connections are clean and tight
The argon flow is working, I have pre and post flow
Arc start is 75A, arc end is 50A
3/32 tungsten 2% Lanthanated, clean and tight
I use the foot pedal, and the digital display shows the amperage changing when I move the pedal... just no arc.
I'm confused. It has always worked flawlessly. Anyone have any ideas? Thank you!