I have an arc between a tungsten electrode and a work piece. The length of the arc remains the same. If I vary the current over a reasonable range (so as not to deform the tungsten nor to reduce the arc to instability) does the electrical resistance of the arc change?
The reason I ask is that I am attempting to quantify the heat input from a pulsed TIG arc as compared to a constant current arc.
p.s. If the resistance does change a bonus point to anyone who can point me to a formula for quantifying the resistance
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04-11-2013, 07:32 AM #1Senior Member
- Join Date
- Aug 2009
Electrical resistance of an arc as a function of current - an engineering question...