Question about RTO Esab Handy Plasma 550 W/25' Pt 31XL Torch 0558002612

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Pulsating Arc ESAB Handy Plasma 550 - Starts to cut then the arc pulsates and cuts a dotted line. The arc seems to be fine and the pulses are regular. What do I need to do to get it to cut a regular line?

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Sounds like one or two of the power diodes are defective (open), producing a half wave pulse instead of full wave, giving it a dotting effect.

Posted on May 15, 2009

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