wrapping welds

I'm having an issue with undercut when wrapping a weld around sharp corners. I have a 3/4" thick plate T with a 1" thick plate. the 3/4 requires 1/2" all around weld. .052 wire size, 375 ipm wire speed 14.5 ipm travel speed 30V tracking at 350 amps. Rj3ib controller Fanuc 120ib arm. Any suggestions?

Yes I am. I switched to pulse weld. Fine termination before and after the corner with C and CNT move in between. Still a small bit but don't think it'll ever be perfect.

Used just arc start s to change schedule.