I've recently acquired a newish (early '90's) Miller Legend AEAD-200LE welder and subsequently an HF251D1 arc starter with a TIG torch. The welder does not have remote control, and by all accounts a footpedal (or equivalent) current control is nice to have.
Miller apparently offered a 14 pin remote as an option on the welder, but it was never common and hasn't been available for some years now. Much Google searching reveals considerable interest in adding a remote control to Miller Legends, but no indication of how to do it (nor any hint why it can't/shouldn't/won'twork) be done emerges. The welder manual shows a schematic complete with component values, but without knowledge of how both the welder and the remote control are intended to work it's not trivial to duplicate the functions of the board.
I've been unable to find aftermarket remotes for the Miller Legend, though units do exist for larger Miller and Lincolnmachines. I inquired of one vendor and was rebuffed with surprising speed, saying simply they don't have the part. It's hard to believe the Legend is all that different.
Does anybody know what the impediment is?