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Original question:

CCS/BOOST-DRV8711: Motor Drivers Forum

BOOST-DRV8711: Assistance Required for Stepper Driver Configuration & GUI Application

Sugadev S
Prodigy 20 points
Part Number: BOOST-DRV8711
Other Parts Discussed in Thread: DRV8711,

Tool/software:

Hi Team,

We are working with the DRV8711 stepper driver and the PR57HS112-4204-01-R stepper motor.

Referring to the driver chip datasheet, we have configured the motor with the following settings and an input step signal of 200 pulses/sec:

  • ISGAIN: 10
  • DTIME: 850 ns
  • TORQUE: 100
  • TOFF: 30 µs
  • TBLANK: 0x80
  • DECMOD: Auto mixed decay (always enabled)
  • OCPTH: 500 mV
  • OCPDEG: 2 µs
  • TDRIVEN: 2 µs
  • TDRIVEP: 2 µs
  • IDRIVEN: 100 mA
  • IDRIVEP: 50 mA

We observe that the motor rotates; however, there is an abnormal vibration during operation.

Additionally, we are trying to locate the BOOST-DRV8711 GUI application and its example source code for reference, but we have been unable to find them. Kindly guide us in resolving these issues.

Thanks & Regards,
Sugadev S

  • 0
    TI__Mastermind 45445 points

    Hi Sugadev,

    Thanks for your post.

    The BOOST-DRV8711 GUI application and its example source code can be downloaded from its webpage, https://www.ti.com/tool/BOOST-DRV8711. See below snippet.

    The BOOST-DRV8711 uses RIsense value of 0.05 Ω. This would set the IFS current to 5.5 A. The 57HS112-4204 stepper is specified for 4.2 A IFS. The IFS can be reduced to close to ~ 4 A by changing TORQUE register value from 255 to 190.

    Sugadev S said:
    Referring to the driver chip datasheet, we have configured the motor with the following settings and an input step signal of 200 pulses/sec:

    What is the CTRL MODE setting used? The default is 1/4 step. Could you please share the current waveform using a current probe and oscilloscope either coil A or B? What is the VM voltage used? 

    Regards, Murugavel