Arc starter lenght and voltage level

admin

Hi !I need some information about the Hf voltage level required to start a arc between the tungsten electrode and work. Assuming that a tig welding machine have the main power current off, and no the shielding gas ( gas closed ) what is the distance between the electrode and work that the spark initiates? If we use helium shielding gas and keeping the main welding current off, wich distance the spark initiates ?  If we use argon shielding gas and main current off, wich distance the spark initiates?? How about CO2? The only reference that I have is from someone playing with HF and argon suggesting that arcs in argon are about 6 times bigger than in air. Thanks in advance of any informationNewton
Reply:It apears that you are testing your starting arc spark.Considering the tung electrode completly cool: 1 - Normal tig welding machine with the main current source OFF and the gas CLOSED (no shiending gas)  can provide 3mm of spark between the tung electrpde and work.2 - And with main source off, and argon gas shielding runnig, the arc starter spark may be 6 to 7 mm.3 - In both situations, the voltag level of pulses reach 6kVpeak in order to open the spark.Anyone has better information??TonyLast edited by tony matt; 07-20-2009 at 04:50 PM.Reason: revision
Reply:Any tig welder can confirm the spark lenght that I have informed???
Reply:Any tig welder can confirm the spark lenght that I have informed???
Reply:Originally Posted by tony mattIt apears that you are testing your starting arc spark.Considering the tung electrode completly cool: 1 - Normal tig welding machine with the main current source OFF and the gas CLOSED (no shiending gas)  can provide 3mm of spark between the tung electrpde and work.2 - And with main source off, and argon gas shielding runnig, the arc starter spark may be 6 to 7 mm.3 - In both situations, the voltag level of pulses reach 6kVpeak in order to open the spark.Anyone has better information??Tony
Reply:ok I will provideThanks