By virtue of a forum member who's acquired a surplus CP-200 in hopes of a conversion, It has recently come to my attention that there's ANOTHER flavor of the CP-200 out there...
The original conversion was on a machine that was designed from-factory to operate on either 230 or 460v. This unit used three coils (A, B, and C) wired in Wye... and each coil has TWO sets of windings... series for 460, parallel for 230... and in both cases, the topology of the 3-phase circuit is Y. When doing the H-K conversion, we separate out each coil, drive the two end coils from the AC line, and drive the remaining (center) coil via two phase-shift capacitors. Because of the Y topology, this means that the two windings of each coil are subjected to 138v each, and when wired in series, equates to 277v, which is correct for a 480Y system. When re-arranging this wiring, we use the 480v jumper position to keep them in parallel (277) and drive it with 240v, so the coils are not at any risk of being applied an excess voltage.
Craig found a CP-200, and noted upon opening it, that the jumper configurations were different from those shown in my step-by-step. He contacted Miller's support staff, and acquired a copy of the manual, and to our surprise, the unit is listed as a 208-230 ONLY unit.
The topology is essentially same as the 230-460 unit, with exception that the transformer primary coils are not two-section series/parallel, but rather one single 230v winding, which has an extra tap for 208v.
This presents somewhat of a challenge, because that identifies the coils as being 138v, and with no ability to re-configure the taps for series (460) operation, the process documented in the step-by-step will NOT immediately work for his unit.
I spent some time thinking about this, and spoke with Peter about it, I believe we have a solution... it will, however, require experimentation and testing. I've thought about how to make this happen- I certainly don't want Craig to bear the effort of experimentation, but I DO want to try it, and if/when it results in a successful outcome, I'll do a step-by-step on the 208-230v unit as well.
That in perspective, what I will most likely do, is trade Craig... I'll take him MY supply (the actual one shown in the Step-By-Step) and bring his 208-230 model to my workshop, to become another late-night experiment. I'm 96% certain that I can make it work, and just-as-well as the 230/460 machine.
In the meantime, for anyone desiring to do the conversion, pull off the terminal strip cover, and CHECK your machine, see if the terminal layout and quantity matches the photos I show. If not, do some research first... get the serial number, get a copy of the manual, and LOOK at the diagrams, see if they match mine. If not, drop me a message here, and I'll work with you to sort it out.