Miller Suit case question

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I just bought a used miller suit case. A S-32P an older machine. I have a new 12 RC and love it. I use these suit cases on my portables. Anyway,,I was told that this older suit case will weld better on cc and not cv. I tried and really saw no difference only it was harder to set up the amps on the cc side since i am not use to setting up a wire welder on amps. Am i missing something here?? Why would you wire weld on cc when you have cv.
Reply:I have a S-32P, also used when I got it. I bought it to go with a welder gen set and unfortunately the deal fell thru after I got the feeder. It was for a Miller big 40 machine that only had CC not CC/CV. I've been told that it will run on any CC power source but I have yet to try it on my Tig machine. I have a 240v mig in the shop and really haven't had a reason to try it.
Reply:Most of these should run better on CV, like you would think.  I have seen some old machines, like dda52's really old Bobcat that ran a feeder better on CC, but that was probably because his CV just wasn't up to snuff or something.I run my CC/CV Lincoln LN-25 exclusively on CV from a Trailblazer 301G and from a modern Bobcat 225NT.
Reply:Yeah, my Bobcat's CV left a lot to be desired before it burned out completely. Then all I had was CC. Ran better and had more adjustment with the CC side than the CV. But my Bobcat was one of the very first that came out. They have gotten some better of late. I tried out my S-32P on my new Trailblazer and it ran perfectly on CV.  It is all in the machine you use it on. Some are definitely better than others.
Reply:You would not use cc if you have cv. You have two different types of feeders here. The 32 series is an arc voltage feeder and will run on any dc machine - cc or cv - and requires only one lead from welder - your welding lead in most cases. The 12RC is a conventional constant speed feeder that requires  a cv machine and a separate control cable to supply 24vac to power motor and  send back signal to fire contactor. Even though they look the same and have the same case - a 'suitcase' - they represent two very different cat breeds. In the old days, constant speed feeders were all we had, but with the success of the arc voltage feeders that allowed field welding with any old dc machine, more people are using them even when they have the luxury of cv since now, with them, the traditional problem of the 'umbilical' cord consisting of gas, power, and control cables all taped together and forever in the way can be eliminated allowing any welding lead to be all that is necessary. weldersales
Reply:I have a Hefty cc/cv feeder and an LN-25. I haven't used the LN-25 on cc but have used the hefty on it. The only real difference I have seen is that using cv resulted in much less spatter and less fluctuation (I believe this to be due to the much smaller variation in voltage of the cv power source). I don't even use them with the cc machine unless there is no way around it. Both weld like a charm using either my xmt304 in mig mode or my gx271 in cv mode.The difference between art and craft is the quality of the workmanship. I am an artist.