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DRV8849: Driving a motor using a DRV8849.

Rohit Bhadauria
Prodigy 10 points
Part Number: DRV8849

Tool/software:

Our application uses the DRV8849 driver to control motor rotation. However, we're encountering a motor noise issue during operation with a load of 0.4 Nm.
Could you please suggest optimal driver settings to reduce the noise?
Here are the current driver settings we are using:

  • Full step mode, without any microstepping. Our mechanical setup uses a 1:8 gear ratio, meaning 8 motor rotations result in 1 full rotation of the mechanical system.
  • The motor operates at 120 RPM to achieve a mechanical speed of 15 RPM due to the 1:8 gear ratio.

Your guidance would be greatly appreciated.

  • 0
    TI__Mastermind 33375 points

    Hi Rohit,

    What was the decay mode setting used? Could you please share the current waveform for one of the windings? Typically stepper motors tend to have higher audible noise in full-step mode. Using microstepping and smart tune ripple control decay mode would significantly reduce the audible noise of the stepper motor.

    Regards, Murugavel