PSU size calculation

[dazp1976]

What about buying them in seperates instead of kitted and getting the 20-80VAC/30-110VDC drivers instead?
https://www.omc-stepperonline.com/cl...20100%20VDC%5D
https://www.omc-stepperonline.com/cl...38%2C651.54%5D

Then drop a 500va 30-35v AC toroidal straight into them?

Costs a little more but.
You'll then safely be able to use the voltage you want to run and have the headroom not to worry about the back emf.
Prob get the setting unit to limit the current.
Just a thought.

[JAZZCNC]

What about buying them in seperates instead of kitted and getting the 20-80VAC/30-110VDC drivers instead?
https://www.omc-stepperonline.com/cl...20100%20VDC%5D
https://www.omc-stepperonline.com/cl...38%2C651.54%5D

Then drop a 500va 30-35v AC toroidal straight into them?

Costs a little more but.
You'll then safely be able to use the voltage you want to run and have the headroom not to worry about the back emf.
Prob get the setting unit to limit the current.
Just a thought.

I deliberately didn't suggest any alternatives so as not to muddy the waters and because you said budget was a factor. However now it's been suggested then here's what I would go for.
These are strong motors at 5.5nm, the drives accept AC or DC voltage, us AC and you only need a toridal transformer, feed them 60-65vac and they spin like a spinny thing spinning.!
https://www.aliexpress.com/item/3279...231e3421DuPQOO

The transformer will need to change though, 30V 500Va wired in series will only give 8.3A so 625Va will be a better choice with the secondarys wired in series to give 60Vac with 10A.


Now here's another twist.!!
If you don't want to go with the bigger motors which from the sounds of it you don't need then consider using 3 phase closed-loop rather than those 2 phase you have been looking at.
3 phase motors are stronger and smoother, they also spin a little faster. Personally I wouldn't use small 2 phase closed loop motors because as you'll see you can get 3phase for the same money. The 1.2deg step angle makes them much smoother and the extra phase makes them stronger higher up the rpm range, so while they are no stronger in total Nm rating and use the same 50Vdc Max limit on the drives they do have a stronger torque curve which matters if your wanting to spin fast as they have more push high up.

https://www.aliexpress.com/item/3260...ba33761fmpzbBE