I'm using automated equipment and I need setting recomendations for butt welding 0.188 nimonic in a single pass with 0.30 wire. So far my best welds have been at 150-175 amps with a travel speed of 7 ipm, wire feed of 15 ips, arc lenght of 0.080, plasma and shielding gas are both argon. My aim is to get full penetration and a crown of 0.060 apx in a single pass. So far i have attained acceptable penetration but haven't been able to produce a crown, all my coupons have had a concave weld on the surface.
I will appreciate all suggestions, thanks Robotweldor