When something in this chain fails, the machine stops working even though nothing is wrong with the machine itself.
Welding cable is sized by American Wire Gauge and by length. Undersized or over-length cable causes voltage drop that shows up as a weak arc and a hot cable. Cable connectors and lugs must match both the cable gauge and the machine terminal style — Dinse, Tweco, Lenco and Camlock are common and not interchangeable without an adapter.
Remote controls, foot pedals and fingertip controls let the welder change amperage without putting the torch down. This matters most for TIG, where amperage is adjusted continuously through the weld, and for out-of-position work where reaching back to the machine is not possible.
Water coolers extend TIG torch life and duty cycle on high-amperage work. An air-cooled torch at 200 A gets hot enough to be uncomfortable in gloved hands; a water-cooled torch runs cooler and lasts longer at the same amperage. Coolers need coolant, and running one dry destroys the pump.
Mounting kits, port kits, dust covers, adapters and replacement hardware keep machines running and protected. Dust covers matter more than they look — metal dust and grinding grit inside a machine causes board failures that cost far more than the cover.
