TIG - Pulsed Arc Welding

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Hi.Im a newcomer in TIG welding.I just bought a new welding machine Cebora inverter TIG AC-DC type Sound AC-DC 2542/T.I would like to know about TIG - PULSED Arc welding.What is the meaning of pulsed arc welding and how to use it?Thanks a lot for the reply
Reply:pulsed tig puts LESS average heat into the plate and still allows penetration.I rarely use it.David.Real world weldin.  When I grow up I want to be a tig weldor.
Reply:can  it be approximated by manually getting hotter/colder with the pedal?  i find when im playing it seems like i can pedal  back and get a little colder puddle  as i travel, stop  and nail it and get a hotter  puddle, dip , hold a bit of heat and then drop back  and travel,,,im not travelling far  so the puddles all overlap...seems to be ok...is this a  legitimate method or is it flawed?     is this what pulsing does?
Reply:Originally Posted by weldbeadcan  it be approximated by manually getting hotter/colder with the pedal?  i find when im playing it seems like i can pedal  back and get a little colder puddle  as i travel, stop  and nail it and get a hotter  puddle, dip , hold a bit of heat and then drop back  and travel,,,im not travelling far  so the puddles all overlap...seems to be ok...is this a  legitimate method or is it flawed?     is this what pulsing does?
Reply:Pulsed arc uses two amperages- background (to keep the arc lit) and peak (or the 'pulse'). Each pulse effectively creates a spot weld, pulse frequency obviously then needs to matched to travel speed so that there is sufficient overlap of the peak pulses to prevent lack of fusion. If the machine will do it then high pulse frequencies (above 100Hz say) improve arc focus and stabilityWorking the pedal can do the same thing but it'll either slow you down and/or wear out your ankle compared to preset pulse parameters. Set up properly it'll allow higher travel speeds with better puddle control though it can also be used to mask the fact that one can't weld (where's the tongue in cheek smiley?)  It's most useful on thin and/or heat sensitive materials, particularly 'production work' as it takes a bit of setting up but once set is more repeatable than a pedal.This is pulsed autogenous stainless (1.2mm 316), full pen closed outside corner (there is a dab of filler here and there though).  Can't remember all the parameters off the top of head but IIRC around 80A peak with a 40% peak time
Reply:Guys thanks for the information.I couldn't seem to find the pedal on my machine.but there's this button that might serve as the same purpose as a pedal.by the way is it possible to add a pedal into another welding machine?i have around 4 welding machine without pedal, and i would like to add a pedal on it if possible.
Reply:It is possible to add a pedal if the machine was made for one.  It needs a plug for a "remote" control.DavidReal world weldin.  When I grow up I want to be a tig weldor.
Reply:Just recently, I have began welding with Millers new Dynasty 350.  It can pulse from .1 to 5000 pulses per second.  I like pulsing so much, I pulse everything now.  There is still much to learn though.  Currently, I pulse at 400 pulses per second with 70% peak and 38% background on the majority of what I do.  It allows me to keep distortion down.  The foot pedal modulating may be the same concept but you'll never get the same results.  Imagine pumping your pedal 400 times per second.  With the dynasty, I can adjust the background amperage so it's not just keeping the arc lit, but actually welding some what cooler.  I talked to a Miller engineer a couple of weeks ago.  He said they are going to offer a class to teach about pulsing.
Reply:i  have access to large amounts of  scrapped thick steel(structural shapes 3/8 and thicker) and not much  thinner stuff, so i practice on thick stuff and pour the  heat. i recognized that i was cooking everything and got some 10 ga to play with.. at first was killing it and naturally lapsed into pedal-pulsing as a means of controlling it and getting the feel of pedal control on thinner stuff at lower amps..
Reply:Hotrodder,Great explanation and photos. Thank you!
Reply:Has anyone else had any experiences with this machine?  There's a Cebora tig welder listed for sale in my area but I'm relctant to buy it. Only attraction to it is a 460 volt 3 phase, that the buyer said can weld up to 1/2 inch. I'm new to tig welding, dont know much. He's asking $1900 but i can probably get it down to $1000 or less.