DIY CNC 2

NWE wrote:

You will get much better speed from your steppers if you power the drives with 48V

Yes, this is a fact, and the drives you chose should be fine on 48V.
Edit:
You can use a 24V power supply and make the machine work and use it daily, later on if you see you might benefit from higher speeds, you can add the 48V supply.

Those should be fine at 48V, i know mine were fine when testing them, but being used at 36V.
The thing is, the cheap drives i mentioned some posts back have 9-42V written on them, but powering them with 36V will cause them to fail, fairly quickly, as the 42V written on them is the "absolute maximum rating" or the point where they die. Typical or preferred working power supply is written as 24V on the chip datasheet. I have them running at 27V for several years.
Yours are a different type, with output mosfets that are usually rated for 100V absolute maximum.
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Sorry for this topic becoming to convoluted, so try not to overthink stuff, get some parts, wire, test, make chips, after a while you get a very good idea of what is perfectly fine and what you could do with upgrading.