power supply help

[Gads]

yet another question...
if i buy a transformer rated with a higher va rating and only use one secondary that is the voltage i need due i get half the amp.
my 3 stepper motors will be 46-57vdc (20-25 x v) = 32-40ac and amp 5.5ea
((5.5*3=16.5)/67%)=11amp.
if i get a 700 va rated 39+39vac and (39vac x 21.8amp parallel) would i be wrong assuming that using just one secondary will put me at (39vac x 10.8a)
thanks

[ViperTX]

Assuming that both secondaries have the same rating...you are correct. Why don't you just parallel the secondaries and have a comfortable current margin.