I configured the chip with 8microstep/step and mixed decay mode.
I set the Vref (pin12 and pin13) to 1.33V and make the motor rotate continuously.
The current sense resistor is 200mΩ. So the setting current driving the motor is 1.33A.
When the motor is running,I measured the voltage of the current sense resistor using my multimeter, which is 22mV. That's is only 0.1A driving current.
Why the actual current is lower than the set-up current?
I measured the voltage of the current sense resistor using my oscilloscope, but waveform isn't a sinusoidal wave.
What's the reason?
Here is the waveform of the current sense resistor: