Not Understanding Pulse

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Im a bit unclear on how pulse helps things on Tig.  I get the whole thing with the metal rapidly cooling and heating so that the weld puddle stays put and stays smaller, but how does this happen in the real world?For example, uf I set my Pulser for 100 pps, does the metal actually have time to cool off a hundred times a second?  It seems to me that it would just stay hot.  Yet I know that there is a use for pulse and that when I use it on thin metal, it prevents the metal from melting away.  Can anyone explain it to me better?  I tried the search function with little help.  Also, I'm repairing a '32 ford radiator surround as an ornamental gift for a ford guy whose my bud.  It's around .010 at some of its thinnest points.  There's alot of irregular curves on it, so I cannot put a piece of copper behind it while welding.  What pulse parameters would you suggest?I have an inverter with pulse, 3/32, 1/16 and .040 tungstens with gas lenses.  Thanks.TA Arcmaster 300CM3XMT 304S22P12 suitcase feederX-Treme 12VSOptima pulserTA161SMaxstar 150STLHypertherm PM45OP setupStihl 020AVP, 039, 066 Magnum
Reply:think of it as moreless not offon...less overall heat input helps on thin stuff..
Reply:Watch this video starting at 7:20. he does a good job of explaining how the pulse is putting in less overall heat. Once he gets close to the edge, the pulse allows him to weld right by it without knocking the edge down. Without pulse, the heat has to go somewhere. As he keeps moving the heat migrates to the metal around it. If he wasn't using pulse, the total overall heat input would melt off the corner of the tube. With pulse, the metal has enough time to transfer the heat out of the area and allow the corner of the tube to maintain integrity.
Reply:On thin metals you hold the pedal so only the pulse melts it and the background current isnt quite enough to make a puddle. This lets you choose exactly what you want to melt and what you dont.Welding/Fab Pics: www.UtahWeld.com
Reply:I don't need one....zap!I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a  dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.
Reply:Originally Posted by Drf255Can anyone explain it to me better?
Reply:Originally Posted by Drf255Im a bit unclear on how pulse helps things on Tig.  Also, I'm repairing a '32 ford radiator surround as an ornamental gift for a ford guy whose my bud.  It's around .010 at some of its thinnest points.  There's alot of irregular curves on it, so I cannot put a piece of copper behind it while welding.  What pulse parameters would you suggest?I have an inverter with pulse, 3/32, 1/16 and .040 tungstens with gas lenses.  Thanks.
Reply:Thanks Dave.  I'm gonna see if I can take some scrap copper and make some type of backer for it.BTW, I have a 300/300, not a GTSW.  I have a low setting for pulse.  It's a % of peak.  The pulses go up to 500 pps.Last edited by Drf255; 09-24-2012 at 05:28 AM.TA Arcmaster 300CM3XMT 304S22P12 suitcase feederX-Treme 12VSOptima pulserTA161SMaxstar 150STLHypertherm PM45OP setupStihl 020AVP, 039, 066 Magnum