Abstract: A welding system for building a workpiece includes a first wire feeder, a second wire feeder, a torch, and a controller. The torch is configured to receive a first wire electrode from the first wire feeder and a second wire electrode from the second wire feeder. The controller is configured to control the first wire feeder to drive the first wire electrode into the torch at a first feed rate, and simultaneously control the second wire feeder to drive the second wire electrode into the torch at a second feed rate.