hi all ,
just a question for tig welders using argon on stainless steel .on striking up the tip of the 2% thoriated tungsten furrs up. Happens every time ,this occurs with the majority of the welders .we are using kempii mastertig sets .could this be due to inferior ARGON ? .The machine has a preflow of 2 secs and postflow of 12 secs ,using gas lens also recently ,using no 12 pyrex cup this keeps the weld really clean even at high amperages also large gas cups ceramics with large gas lens ,but it is this niggling thing at striking up .
any ideas greatly appreciated