[jguzi]

What I have:
motor 1 nema34 6.6v 3.0a inductance 12mh
motor 2 nema34 6.6v 3.0a inductance 12mh
motor 3 nema34 6.0v 2.0a inductance 12mh
motor 4 nema24 3.6v 3.0a inductance 2.4mh
motor 5 nema24 3.6v 3.0a inductance 2.4mh

motor 1 12mh sqrt=3.46*32=110.72v
motor 2 12mh sqrt=3.46*32=110.72v
motor 3 12mh sqrt=3.46*32=110.72v
motor 4 2.4mh sqrt=1.55*32=49.6v
motor 5 2.4mh sqrt=1.55*32=49.6v

3.0a x 5 motors = 15a x .7(70%)= 10.5Amps
Current = Amps needed per drive * Number of drives * 0.7

So here is a question1:
So is it safe to say I need 2 power supply's one 110v 10amp and a 50v 10amp? Plus a 5v/12v supply to run board and switches?

So here is a question2:
What is a better breakout board to use a cnc4pc/c11 or pmdx-122?

I posted this in my "Spaghetti Wiring" post but wasn't getting any input. I'm not an electrician so I don't want to buy stuff I don't need.

[salzburg]

The size of the power supply depends on what stepper drivers you are using.

[jguzi]

thanks, Salzburg. i am using 4 CW250 stepper drivers

[jguzi]

salzburg
Here is a picture of the stepper driver.Attachment 225246

I had found a website that explains power needs in a formula:
Current = Amps needed per drive * Number of drives * 0.7
volts is based on inductance "sqrt of mh*32=volts

So then should my question be do I need larger stepper drivers for my 12mh (inductance) motors?
any help is appreciated.

[ger21]

Most stepper drives max out at 80V, unless you want to spend $200+ per drive. You'd probably be a lot better off selling the high inductance Nema 34 motors and buying lower inductance motors.

Ebay is flooded with these poor performing high inductance steppers, and unfortunately inexperienced people fall for the bigger is better logic and end up with poor performing motors.

[rowbare]

Most stepper drives max out at 80V, unless you want to spend $200+ per drive. You'd probably be a lot better off selling the high inductance Nema 34 motors and buying lower inductance motors.

Ebay is flooded with these poor performing high inductance steppers, and unfortunately inexperienced people fall for the bigger is better logic and end up with poor performing motors.

Yeah and they "fix" it by buying even bigger higher inductance steppers...

bob

[Toinvd]

Because you do have drivers and motors, I would start using them.
Your drivers are marked for < 60V so stay below that value. Good 48 Volt powersupplies are reasonably priced. I would get a 10 or 12 Amps one and it will do the job.
The maximum speed you can get is limmited by the voltage and the inductance.
But if you reach the speed you want, what's then the reason to spend money on new motors and drivers to be able to run a speed you don't need.