First, let me say that I like to use a foot pedal for most of my Tig welding. There is just no substitute for precise amperage control without the risk of moving the torch.
That said, there are times when a torch switch can be pretty handy.
A torch switch is basically an on/off switch so whatever you have the amperage set on the machine is what you get when you press the switch.
visit the weldmonger store
With a Torch Switch you dont have any amperage control
Well, not exactly.
That is where 2t, 4t, and upslope/downslope settings come into play.
The t in 2t and 4t indicates the number if touches on the switch that it takes to initiate a different phase of the ramping up or ramping down of the welding current.
So by using the 2t setting and by adjusting the upslope and downslope, there is a certain level of amperage control....not quite as good as a foot pedal amperage control, but better than nothing.
stainless steel tubing weld done on turntable using 2t settings and a timer switch
While a torch switch comes in handy, it is not the best all around way to tig weld.
I can think of all types of jobs where a foot pedal is the only way to go because any extra hand motion can cause problems.
see more tig welding videos