DRV8428: Stepper motor drive

Hi Wang,

Thanks for your reply.

The customer sets the en and nsleep pins of the motor high, the motor starts vibrating and then enters a step signal to the motor, still vibrates. Since the customer does not have a current monitoring device, a 3-ohm observation voltage is placed between the stepper motor and the drive board aout1 pin, as shown in Figure 1. In the same way, it is observed that bout1 has no output and no change after the stepping signal is given, as shown in Figure 2.

For vref, the customer inputs a voltage of around 2.9v via the dac of the control board (since the drive current is 1A), but the motor will still vibrate even if the vref pin is left empty when enabled.

Figure 1: Aout1 output

Figure 2: Step signal

Figure 3: Schematic (Drive chip is co-located with control board via power)

Figure 4: PCB routing

Figure 5: Motor parameters

Thanks and Best Regards,

Cherry

Hi Wang Li,

Then we can close this thread since the customer has posted the question by himself.

Thanks for your help again!

Best Regards,

Cherry