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DRV8824: the issue of driving

Leo He
Intellectual 420 points
Part Number: DRV8824

Drive a stepping motor. working voltage is 12v,  1 second between  running forward direction and backward direction  

1.   forward direction  : 500 pulse

2.   backward direction   : 500 pulse,

3.    running forward direction and backward direction  go through   20  cycle,   

    finally, It is more than 1 mm from the origin.

what caused this problem? 

Looking forward to your reply, thank you very much！

  • 0
    Intellectual 420 points
    we trid another chip of Allegro with same software, the problem solved ,
    Dear Ti 's engineer，could you answer my question?
  • 0 in reply to Leo He
    TI__Guru** 114905 points
    Hi Leo,

    What are the settings used for the DRV8824?
    VM voltage - 12V
    AVREF/BVREF voltage?
    MODE2, MODE1, MODE0 pins?
    DECAY pin?
    Sense resistor values?
    How many steps are required to create a 1mm offset?
    Do you have the STEP pin set to a logic high when nSLEEP is set to a logic high?

    What Allegro device did you use?
    What are the settings for this device?