A welding head employs a carriage assembly for guiding the welding head
along a track or guide. A torch assembly, mounted on the carriage
assembly, is configurable for multiple welding processes. The torch
assembly includes a torch block and a GTA filler wire guide mounted
together on a mounting plate, whereby the GTA filler wire guide is placed
in general proximity of a welding torch mounted on the torch block. The
torch block accommodates the mounting of either of a GMA torch and a GTA
torch. Additionally, the torch block accommodates placement of a GMA
adapter sleeve within the torch block to feed a filler wire through the
GMA torch. A system control unit provides manual, semi-automated, or
automated control of welding system resources including a welding power
supply, a supply of one or more shielding gasses, and a fluid coolant
supply.