Support components for weld head machines; weld heads machines, each comprising a carriage assembly, a torch assembly, cables, wires, electric motors, and gearing mechanisms; weld heads as components of welding machines; electric arc welding machines, electric welding machines, gas-operated welding machines, laser welding machines, computer controlled gas welding machines; and computer controlled electric arc welding machines; and replacement parts for the foregoing; Support components for we...