I have a 48v/7.3A PS running Nema 23 stepper motors thru a 540 Gecko driver rated at 3.5A/motor.
Stepper motors:
1) 2.55v/3.5A bipolar
2) 4.17v/2.8A bipolar (has resistor at DB9)
3) 2.55v/3.5A bipolar
If I understand correctly, these motors at holding are drawing their respected current.
Total 3 steppers - 9.8A
Under-powered ?