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Voltage-sensing wire feeder

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Voltage-sensing wire feeder is a feeder that operates from arc voltage generated by a welding power source.[1] The wire feeder is powered from the welding voltage. The control circuit in the feeder will sense the arc voltage and adjust the wire feeding speed up/down to keep the arc voltage/arc length constant. The voltage sensing wire feeder is frequently used for welding with flux-cored wire.[2]

Reference

  1. http://www.hobartwelders.com/elearning/glossary.php
  2. http://www.arconweld.com/