... you measure currents in series or the related voltage parallel to a resistor - from the measured voltage and the resistor value you then calculate the actual current with the formula: I (current in Ampere) = U (voltage in Volts) / R (resistance in Ohm)
The stepper drivers often have a bigger sense-resistor with a value of some Ohms to milli-Ohms - regarding the possible max. current.
But with high frequent stepping you have to measure the correct voltage with a scope, as a multimeter will average the single spikes to a much smaller value ...
The stepper drivers often have a bigger sense-resistor with a value of some Ohms to milli-Ohms - regarding the possible max. current.
But with high frequent stepping you have to measure the correct voltage with a scope, as a multimeter will average the single spikes to a much smaller value ...