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If that is a Miller Syncrowave 180 SD you are talking about, it is not a scratch start. I don't know what to call it, but you push on the pedal, and it starts the arc. Beautifull, automatic if you wish.
G.
The 180 SD has high frequency starts. The HF goes off after the arc has started when welding steel, but has to stay on when welding aluminum. I hope that helps you...
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