Drv8825 max vref?

This topic contains 3 replies, has 3 voices, and was last updated by Profile photo of vicious1 vicious1 1 week, 5 days ago.

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  • #24532
    Profile photo of Timothy
    Timothy
    Participant

    I have a set of Nema 23 motors and I was going to use the microcontroller I bought from your shop to run the setup but I’m a bit stumped. The motors have a max A/Phase of 4.

    So going by what I saw in the video on this site for setting up the current limit http://www.vicious1.com/assembly/ramps-wiring/ ,I am limited to setting the vref to .75 volts? Which would max out the Drv8825?

    Am I doing this correctly?

    #24546
    Profile photo of vicious1
    vicious1
    Keymaster

    If you have good fans on them you can run the drv8825’s at 1V sometimes up to 1.2V

    #24547
    Profile photo of Tom Cole
    Tom Cole
    Participant

    Is the increase in voltage just to help the motors resist slipping?

    #24548
    Profile photo of vicious1
    vicious1
    Keymaster

    more power overall

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