Amplifying the signal of a control board for several stepper drivers

Discussion in 'General Electronics Chat' started by PropellerHat, Jul 18, 2015.

  1. PropellerHat

    Thread Starter New Member

    Jul 18, 2015
    Hello everybody

    This is probably an easy one but here it goes: I am facing an issue of my 3D printer not being able to retract and the reason is probably my several daisy chained EasyDriver stepper drivers. I have 6 extruder motors and they do otherwise fine job but the retraction (reverse rotation of the stepper) is missing. I assume the square wave Step signal is strong enough for six drivers, but the dc voltage of the Dir signal that tells the drivers the direction to run is too weak. I assume there is either "ground" or dcc in the signal depending on the situtation. Can somebody tell me if this is really the case? I dont have an oscillator yet to check things properly. How can I amplify these so that it does not cause anything weird?

    Thanks in advance for the help :)