I should explain...

Probably like most people who are new to CNC'ing, once the bug bites I just want to get on with something ASAP. Unfortunately, I've come to discover that every decision seems to rely on another until you've gone full circle and are back at the start ;-) Well that's how it feels anyway.

I was hoping that the PSU would be something that it was possible to get started on, and that it would be possible to 'spec' one up that could work across a variety of motor choices, and also still be usable in the future on possibly a larger machine. So essentially an over engineered/spec'ed one.

My curiosity was piqued by Jazz saying that a 6A PSU didn't allow much leeway for expansion. So as I stated, I just wondered what people were using if they wanted 45V but at a higher VA output. Was the reason that 45V was recommended over 50V simply because the 50V version has a lower current output... 5A on the 50V compared with 5.56A on the 45V?

The simple answer might be to just buy another brand as Andy suggested.

Cheers