To whom it may concern,
I am currently working on my senior capstone project for my undergraduate in engineering and I have encountered some issues with my motor driver. The driver my board uses is the DRV8825 on the Waveshare Stepper Motor HAT and the motor I am driving is the NEMA17 (100:1) Geared bipolar stepper. Upon usage of a multimeter to probe the current that is driving the motor I am getting values that are very small (0.022-0.015A) depending on the orientation of the potentiometer on the board. Have I burned out my chip? Secondly, something the noticed today, when I position the power switch to ‘off’ the motor continues to make the high frequency current chopping sound in steady intervals alternating from a high pitch sound to a short pause. How can I verify if my motor driver is still functional. Any clarification upon this matter would be greatly appreciated.