TOS-KURIM CNC Upgrade

[JimJam]

Started making some progress finally!

X and Y axis ball nuts rebuilt with new oversize bearings, and also new AC bearings on the screw shafts seems to have sorted the backlash issues!

Started moving on to the electrical side of things and I've come to a bit of a halt already trying to work out the transformer..

In the attached picture, the right three wires should be the primary coil supply, so according to the diagram on the transformer that's either 415V or 380V supply going in? And on the left are either end of the two secondary coils which are labelled as 2 x 140V...


So I guess what I'm trying to verify is that I will really only need to connect my 415V AC supply to the primary, and then remove some winding from both secondary coils until I achieve 100V across them?


I have also attached a photo of how it was wired in the current setup, I got a little confused with what appeared to be a 140V leg attached to ground? everything the same colour wire makes it so confusing!!