Sound like a bit of a faff around.usually strike the arc under argon then swap over to pure helium once the arc is established
The sets I've used it on automatically switched over from Ar to He, not sure if this is still the case with more up to date kit. Years ago a company I worked for sold a load of small DC inverters for use by RAF ground crew to do small ali repairs on aircraft whilst sat on the tarmac, they used pure helium and must have used scratch start arc initiationSound like a bit of a faff around.
Was meant to try it when I picked up a DC Tig set from @eSCHEn, although I’ve never got round to it, and the cylinder of Helium sits unloved in the corner still..
We're in the process of developing a new D.C. T.I.G. Alumininium welding system, at the moment it is a purely automated system
The video is a couple of years old cos that's when work first started on the project, the final spec has only recently been sorted with the first U.K. customer trials taking place towards the end of 2018.Impressive, and video is at least 2yrs old
The gases are not that special, the outer shield is straight argon and the inner shield is an argon doped with oxygen mixtureVery impressive.
Significant costs in investment and consumables maybe but at 200cm/min in the right industry it’s going to buy its self back on good ol fashion arc time.
I’m guessing a big lump of the technology involved is in the electrode and penetration. 2 things that really suffer in dcep tig.
Penetration coming mainly from the gas mixture I’d imagine??
Any info on that electrode mate. It must be something pretty funky to cope with DCEP and O2 doped gases.The gases are not that special, the outer shield is straight argon and the inner shield is an argon doped with oxygen mixture
They're a custom made piece of kit, you can use standard zirconiated tungstens with the doped gas for AC TIG welding allyAny info on that electrode mate. It must be something pretty funky to cope with DCEP and O2 doped gases.
I remember you saying about a tiny bit of o2 on ac.They're a custom made piece of kit, you can use standard zirconiated tungstens with the doped gas for AC TIG welding ally
http://www.linde-gas.com/en/images/ARCLINE PP brochure_tcm17-430029.pdf