Anyone recognize this motor?

[Mjolinor]

- I don't know about that, from my knowledge of motors the winding is specific to the voltage required for optimal operation (hence the motor rating). I gained my some of my stepper knowledge from THIS PDF & THIS PDF. High voltage motor winding's tend to give more running and holding torque.

Which is what I said worded in a different way.

If you have 2 stepper motors, one being 12 volt and one being 24 volt but both rated at 2 amps then the power output, at maximum volt and current, of the 24 volt one will be twice the power output of the 12 volt one (assuming the same efficiency).

If you run them from 12 volt then the power output from both motors will be the same because it is the current that is regulated, not the voltage.

In reality the 24 volt one will produce slightly less power than the 12 volt one when running from 12 volt because the magnetising power needed on the 24 volt one will be higher than the 12 volt one but you will not notice a difference in real usage.

In the environment of 3d printers you are unlikely to come anywhere near needing the maximum of any stepper motor no matter what voltage or current it is rated for.

The stepper driver limits the current, it doesn't care what voltage you apply as long as you do not exceed the maximum of the driver circuitry which is around 35 volts for the chip that is most commonly used.

If you set the current to some value less than the V/R value of the system then all that will happen is that the stepper driver will drop the voltage applied to the stepper motor because the stepper motor must obey Ohms law whereas the stepper driver does not obey Ohms law. This is assuming that we are not in the realms of the dynamic impedance of the motor affecting the current flow which we will almost certainly never be with the speeds used in these types of machine.