# How to calculate power supply requirements for Closed Loop Stepper Motors?

I have a CNC Router table that has 4 Nema 23 stepper motor (open loop). I want to upgrade the machine and use 4 Neam 34 Closed Loop Steppers. These are the motors and drivers I'm considering:

Steppers: Nema 34 Closed Loop Stepper

Motor Type: Bipolar Stepper
Rated Current/phase: 5A
Voltage: 5V
Phase Resistance: 1ohms

Output Peak Current: 0~8.2A
Input Voltage: +24~80VDC (Typical 48VDC)
Logic Signal Current: 7~16mA (Typical 10mA)
Pulse Input Frequency: 0~200kHz
Isolation Resistance: 500MΩ


My questions are:

1. How should I calculate/choose the power supply for these 4 steppers? I have looked around for this and found many things, like measuring the voltage on the motors while running, some multiply the Rated Current/phase for the number of motors, and so on. I think part of my confusion is that I don't have a lot of experience with electricity (voltage and amps).

These are the ones this company offers.

Is it as easy as selecting one (350W 60V 5.9A) that is close to 48V?

1. Does it make sense to find an unregulated power supply for my CNC? It looks like none from this website is.

2. Does it make sense to find a power supply that is more powerful and uses only one for all motors instead of 4 of them?