Output from D2 goes to the wire and the table, ct1 goes to another circuit to control the feed rate, this will be replaced with a servo system and the inputs to the multitap transformer com from the 240V line, providing the input to the high current loop. I did not want to include any more, because everything else will just confuse the subject, it is a servo system of some sort that will be completely replaced anyway and the diagram of that system is very hard to read, and will not be used any way.