tig pedals question

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This question was brought to my mind after seeing 7a749's tig footpedal box. i didnt want to jack his thread being as i have multiple questions. 1: In his pic it looks as if the pedal is compressed but he says its not so i would asume it has very little travel. If you take 2 pedals and 1 has 3" of travel and the other has 1_1/2" is the ratio the same as in 1/2" mean say 50 volts or is it that 1" (of travel) on the 3" (pedal) equals 50 volts then 1/2" of travel on the 1_1/2"  also equals 50 volts.......... also does the diffrence in travel make any diffrence in weld (i would assume not but just confirming) or is it just personal prefrence. also  is there a diffrence between these 2 style pedals beside personal prefrence like durability?   thanks Zach
Reply:Foot control performance isn't determined by travel distance.The RFC-23 series control in the first photo has a tall wire wound resistor (about 4" tall) whereas the one in the bottom photo would have a much smaller style and others have potentiometers driven by a cog belt such as the RFCS-14.Machines have been designed with a vast array of remote resistance, wattage and voltage requirements and so the number and type of controls vary to match.MM200 w/Spoolmatic 1Syncrowave 180SDBobcat 225G Plus - LP/NGMUTT Suitcase WirefeederWC-1S/Spoolmatic 1HF-251D-1PakMaster 100XL '68 Red Face Code #6633 projectStar Jet 21-110Save Second Base!
Reply:thanks a quick google of rfc -23 n rfcs-14 has pretty much answered the rest of my questions thanks
Reply:The smaller amount of travel will give coarser control for any given setting.  For example, if the welder is set at 50 amps, a 1" stroke pedal will give basically 5 amps per 1/10" motion of the pedal.  A 3" stroke pedal will give a 1.67 amps per 1/10" travel of the pedal.  The longer stroke gives finer control of the current.
Reply:yea sorry i do not know why i wrote volts ooops rookie mistake and that was wat i was looking for but that doesnt rlly affect the weld as long as you yourself is calibrated to the diffrence right
Reply:The lower the current you are welding at, the more it will affect you.  On really thin material, it will give you greater control to have a longer stroke pedal, so you can finely regulate the current.  At the higher current levels, it doesn't make too much difference.