So the beauty of the pedal control - is that it's a gas pedal... you need to learn to use it as such. If you see the puddle flattening out or your speed is just 'slow' then back off... and that will lower the heat. It's really a three handed operation and you really need to be able to see the puddle and react accordingly. Nobody can really "teach" you this - but pointers of what to look for etc can kick your brain into gear! LOL
You can pick up your speed - but it's easier to control the heat. Welding is ALL about controlling the heat! You don't want to floor the pedal and then try to weld fast enough to keep up... So you create the puddle -- generally by "accelerating" into it - then like tailgating - you need to just back off a bit and start your dip and move. Make the puddle -- move back and dip - move the puddle forward - move back and dip...when I say move back - you're getting the tungsten out of the way which should have been over the puddle... so you're just backing out enough to get the rod in without contaminating your tungsten. It's a little hand dance... and when you see you're puddle widening - or building up or whatever - you need to control THAT PART with the pedal. Increasing or decreasing the heat. When you're coming to the end of a part -- you need to start to let up... as there's nowhere for the heat to go and if you don't start kind of "coasting" up to the end - you'll just blow through... if you do it right - you'll coast on up there - do your little double dip (quickly!) it's a dip dip done while letting off the gas. Then hold the torch for cool down and protection of the puddle (post gas).
If you're going to weld something with corners.... tack your edges - working them with a tap of a hammer or moving the clamp or whatever that takes (there's so many "things" that you can't explain 'em all) to take out the warp or "opening up" of the metal gap.... but remember to weld the corners (or ends for that matter) up first before you start to close up.... that way you're not pushing all that heat to the very edge with nowhere to stop. If you weld up the corner first - you have a place to go right up to without blowing the corner or end away.
