Correct current for A4988

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  • #1998 Quote
    Mendy
    Participant

    I’m trying to figure out how to set the current on the A4988 correctly.
    I’m using the motors from the BOM, I think they’re all rated for .4 amps, so according to my amateur calculations I need to set it to .32 volts (8 * .1 * .4 = .32). The problem is that setting them to .32 volts makes the motors barely able to move, and the current drawn from my power supply is less then an amp, which doesn’t sound right.

    This is my first time dealing with this kind of stuff, so any help would be greatly appreciated!

    #2005 Quote
    Angel LM
    Admin

    Hi Mendy!

    The 0.4A is the current drawn by each phase of the stepper. As we are using bipolar (2 poles) stepper motors, there are 2 phases. So the total current drawn by the stepper should be around 0.8A at 12V.

    Let me know if it helps!

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