help sizing toroidal PSU to stepper/drives

[Dragonfly]

I've read and remembered this rule somewhere on the CNCZone (I think): "Never apply voltage that is greater than 32 times the square root of the motor inductance in mH.

BTW, where do you get the 6064 drivers from? I am looking for the chips only but without success.

[irving2008]

I've read and remembered this rule somewhere on the CNCZone (I think): "Never apply voltage that is greater than 32 times the square root of the motor inductance in mH.

Its not a 'never' its just a good rule of thumb, theres generally little point in applying a higher voltage, you won't get significantly better results.