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How to set stepper current on PRO V-3 controller?

Discussion in 'CNC Mills/Routers' started by F Kaylor, Jun 9, 2019.

  1. F Kaylor

    F Kaylor Well-Known
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    Check my thinking here: Using the ProV3 controller, NEMA 23 steppers and 24VDC power supply. Stepper Motor data says the rated current/phase is 2.8A and the resistance/phase is .9 ohms. The resultant voltage (I X R =E) is 2.52volts. So do I adjust the trim pot to approximately that voltage to achieve the rated current to the stepper motor?
    Thanks!
     
  2. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
    Staff Member Moderator Resident Builder Project Maker Builder

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    As the XPRO only has 2.5A Max drivers, which suffer thermal issues around 2.1A already, best to adjust to 'not running so hot it cuts out' and install a fan blowing on the board. You wont get optimal torque with this setup, but should be good enough for most uses except really heavy use cases
     
  3. F Kaylor

    F Kaylor Well-Known
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    Thanks Peter. I do have a fan directly on the drivers. But how do I set it to 'not running so hot it cuts out"? Since it seems to me that this would be a trial and error method...the trial might be OK but the Error might result in a burned out driver...
    FK
     
  4. sharmstr

    sharmstr Master
    Moderator Builder

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  5. F Kaylor

    F Kaylor Well-Known
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    Ah...the "Official Way" Followed the link...thanks...and that is just what I was lookin for!
    Thanks
    Frank
     
    sharmstr likes this.

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