Heat when welding different thickness metals

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I am building a small cart to put under a belt sander so I can move it around easy.  The frame is built out of 3/16 angle iron.  I cut 4x4 1/8 squares to weld in the corners for the legs of the belt sander to sit on.  For welding the angle, I used 3/32 red w/ 3/32 rod at 185 amps.. When I welded the 1/8 squares I left the same settings..  In a previous thread it said a good general idea is for every .001 thickness of material it is ~1amp on the dial.  When welding two different metal thicknesses, should you generally go with the lower thickness metal or stay in between from an amp perspective?Example:  3/16 = .180 and 1/8 = .120  Should I have stepped down to closer to 120 amps when doing the fillet's on the 1/8 squares tot he 3/16 angle? Attached Images
Reply:That can be a trickey question..From the looks of it it's not going anywhere fast and all I see is a need for you to just get "More Consistant"..I'm not one for "settings" as per say..I leave my machine on "Kill" all the time (Except when dealing with material under .090 thick) and just regulate the heat with the pedal..My machine goes from 40 amps to 300 on kill so iI usually let the pedal do the talking..You will see afterawhile that it really is in the pedal....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:clean the millscale and all that other crap off before you weld on it.  It will make life alot easier.
Reply:Originally Posted by drivethruboy54clean the millscale and all that other crap off before you weld on it.  It will make life alot easier.
Reply:Yes, I used a flap disk and hit it pretty hard before starting.. The metal had a lot of pitting, so that might be what is showing up in the pic..  I don't have a water cooled torch - my hand was getting pretty hot.. I'm using a Dynasty 200DX.. I started playing with it on some of the other welds and they looked better.. I still have a lot of practice to do.. I am posting the finished over in the projects section if you want to see how it came out.. thanks
Reply:The exact heat setting doesn't matter.  Watch the puddle and favor the heavier stuff.  When its right you will know it.I set the heat  each time I use the machine because it gives the pedal more resolution.  If its not enough, I turn it up.  If its way too much, I turn it down.  It gives me more control and I need all the help I can get.  The welds look pretty good.I find with an air cooled torch I can run one 36" filler rod then put the torch down and let it cool.  DavidReal world weldin.  When I grow up I want to be a tig weldor.
Reply:When I weld thick to thin I usually use the heat for the thick and the filler size for the thin.  I have done it a few times and that combo works best for me.  Even though you do not need all the heat, I just use the pedal to control the amps.  I also use the tung recommend for the thick metal.Just an idea....Build a Barstool Racer at BarFlyRacers.com!