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.

[irving2008]

OK had a chance to do a little more research. There are various versions of this board but its possible that it takes the 240v AC and rectifies this to provide the DC for the spindle so be careful how you relocate this into the new box as there could be 340v DC on that board.

Personally I'd get a new 36v power supply for the steppers as the new drivers can handle it and you'd get speed/torque benefits.

[Carlb1058]

My thoughts exactly (replacement that is) to be honest.

As I said, I've worked out where the X,Y,Z etc go and the power but still don't quite understand how to wire up the spindle, does that require a seperate PSU as the ebay sellers are as useless as tits on a bull when it comes to answering questions, and how does one work out which wire from let's say X goes in to where on the steppers. I've tried I think every combination in to A+ A- B+ B- but can't get movement so frustration is creepin' in now