Confirming PSU spec for steppers.

[Rogue]

Spend little more and Get the AM882 with lead and you can program them to exact amps and much more, they are great drives.

Intriguing. I've seen a bit posted about the AM882 drivers but a lot of it didn't seem positive. On some further reading, most of the issues seem to be down to user error and misconfiguration. The price difference at this stage is minimal as well.

Is it better to match up the driver output with the motor rating exactly, or leave a bit of a margin?

A small problem with wiring the secondary in parallel is that if the amount of turns on them is not exactly the same the transformer is not as efficient.
I got around this by rectifying the two windings separately then combining them at the DC side.
Just a thought. ..Clive

Also intriguing, though how would you establish that? Would it be as straightforward as checking the voltage from each output separately? I suspect I will take the easy way out and just use the one rectifier, but I'm intrigued by the idea.