Re: How to identify specs of working motor

... with a scope you'll be able to see the 'chopping' parameters and rise/fall of the voltage, but normally it's simply a matter of max. voltage the drivers will suffer and max. possible current, until the coils overheats.

Common bipolar stepper drivers output a short peak of their max. voltage and then regulate the current to the settings defined by a trimpot or discrete resistor-values ...