Current Limit Help on Non-Standard components

New Home Forum Assembly Current Limit Help on Non-Standard components

This topic contains 3 replies, has 2 voices, and was last updated by Profile photo of Dave Yurko Dave Yurko 1 month, 2 weeks ago.

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  • #19929
    Profile photo of Dave Yurko
    Dave Yurko
    Participant

    I have searched and read through most of the posts on setting driver current limits and came to two conclusions…either I’m severely math impaired or I just crave the special attention of my own post. But seriously I think it’s the math…

    Just finished my 24″x48″ cut area build. I’m running the machine with a Raspberry Pi with the Protoneer Raspberry Pi Hat running at 24v, A4988 drivers set to 1/16 microstepping.
    Steppers are: 2.8v, 2.0a per phase, 1.4ohm phase resistance. I am running the XY pairs in parallel with your wiring harness.

    Any idea what my currents on the XY pairs and the z motor should be? Looks like the factory defaults are at .55

    Thanks in advance for your time and sorry if this is redundant.

    #19930
    Profile photo of vicious1
    vicious1
    Keymaster

    In parallel for the x and y no more than 4/2.5=1.6v max but I am guessing that you can’t turn them up much higher than .6 or .7
    In series 2/2.5= .8v but that again should be max so .6 or .7 this also works for the Z axis.

    You are fighting thermal shutdown so keep an eye on them for the first few uses, drivers and stepper temps.

    #19931
    Profile photo of vicious1
    vicious1
    Keymaster

    from here.

    #19932
    Profile photo of Dave Yurko
    Dave Yurko
    Participant

    Awesome…thank you sir…

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