I have this same welder ( lincoln welpak 100hd ). I have purchased the "gas kit" as well as the "aluminum kit". I have practiced with it all weekend trying to weld some 6061 T-6 extrusion that is .160 thick. Sometimes it welds good, but I have not been able to get the "stack of dimes" bead to run. Most of the time it is either too cool or too hot and blows through the material. I am using 100% argon gas, but don't know for sure what to set the gas pressure on. I wish I had done more research before buying the add-ons for this welder. Any help on the gas pressure is greatly appreciated.
James |