From Chinese to Taffynese

[irving2008]

Ok, hard to tell from the pics but I suspect you're a little confused. What you're calling the PSU (the round jobby) is just the transformer - it is only one component of the PSU. It has, I'd guess from the picture, two 18volt AC secondary windings. The primary is the 240v winding (suggest you read up on transformers on wikipedia). The lower board rectifies the 18volt AC to give approx 24v DC. You will need to connect this to the 3 new drivers. The easiest way would be to use a bit of 10amp 'chocolate block' connector strip to act as a splitter. I'd do you a drawing but can't on my phone.

Its not clear from the pic what the spindle connections are so I'm not going to comment right now, but PWM (pulse width modulation) suggests that lower board also has the spindle speed controller on it. Can you post a close up of the lower board only.