Power supply

Tool88

I am trying to figure out what power supply I would require, I have seen the data sheet for the duet 3 6hc, but what I am having some trouble with is what would be ideal.

I bought 3 steppers from steppers online
They are nema 34 model 34he59-6004s.
They are rated at 6amp each but I am not seeing the voltage, what I can find for other nema 34 steppers are in range from 60vdc to 100vdc.
Should I use a 48v 1000w power supply.

Machining I am ok with but this is all new to me.

So what size power supply would anyone here recommend.

Thanks

dc42

@Tool88 you don't need anything like a 1000W power supply. The resistance/phase for those motors is 0.7 ohms so even if you run them a 6A in both phases they would draw 50.4W each, times 3 is about 151W. But you also won't be running them at 6A in both phases continuously because (a) you will be microstepping them and (b) they would get extremely hot if you do. The most you are likely to run them at is 6A peak and I suspect you will run them lower than that to avoid overheating. So that cuts the power consumption by half to about 75W. They will draw somewhat more when accelerating a heavy load.

A 48V 250W PSU would almost certainly be sufficient, assuming you are not using the same PSU to drive any heaters. However, it's always better to allow some margin, so I suggest a 48V 400W PSU.

Tool88

Nope no heaters or anything like that, I'm only interested in making chips.

thanks you guys have been extremely helpful

Mark Markus

@Tool88 said in Power supply:

I am trying to figure out what power supply I would require, I have seen the data sheet for the duet 3 6hc, but what I am having some trouble with is what would be ideal.

I bought 3 steppers from steppers online
They are nema 34 model 34he59-6004s.
They are rated at 6amp each but I am not seeing the voltage, what I can find for other nema 34 steppers are in range from 60vdc to 100vdc.
Should I use a 48v 1000w power supply.

Machining I am ok with but this is all new to me.

So what size power supply would anyone here recommend.

Thanks

NEMA 34s typically operate at 48-80V DC. 3 steppers × 6A × 48V = 864W theoretical max
Your 48V 1000W supply is perfectly sized.