English to Spanish Tech/Engineering Metallurgy / Casting Welding

" If Arc voltage is increased to retrograde the tungsten away from the bouncing welding puddle, weld width will be increased"

I'm using 'baño de fusión' for 'welding puddle', but I can't think of the precise term to translate 'bouncing' in this context. The idea is that since the puddle bounces away from the weld face, the tungsten must be moved away from it. I've discarded 'que chispea', 'que salta'. I think there's a better word.

Thanks