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Blackbox x32 max current tuning

Discussion in 'Controller Boards' started by SebastienH, Jan 26, 2025.

  1. SebastienH

    Builder

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    Hello, AFAIU, the current limit is set by turning the pots on the x32.
    My question is: as I use NEMA23 steppers rated at 3A, how can I know if I'm over or under that setting?
    Should I add a multimeter on one wire of the stepper to tune it?
    Thx in advance for your ideas

    Seb
     
  2. Peter Van Der Walt

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

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    If its too high, fault indicator will light up. Too low and motor will stall under normal use. Factory default is good for our NEMA23s. It's a wide range of OK (bottom end of scale is offset, minimum is 1.2A (not 0), max 3.2A) so you gotta be quite far off to effect issues (like all the way down motor will still have some oomph)

    3A current rating = the motors max, do not exceed value. Not recommend setting. Your car can rev to max 6000RPM but you drive it at 2-3000RPM so it will last, same thing. Running motor at its max rating will overheat motor and damage windings' insulation in short time

    The correct current setting is where machine doesn't stall under normal use. And doesn't overheat on standing still (in brake motors use more current than while Moving)
     

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