What is the Miller Big Blue 400D and what welding processes can it perform?

The Miller Big Blue 400D is an engine-driven welding generator powered by a Deutz diesel engine that can perform TIG (GTAW) welding, Stick (SMAW) welding, MIG (GMAW) welding, Flux Cored (FCAW) welding, and Air Carbon Arc (CAC-A) cutting and gouging. It is available in both CC (Constant Current) and CC/CV (Constant Current/Constant Voltage) models with output ranges from 55-500 amperes.