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  • #7583
    3DMakerZone
    Participant

    I am confused about wiring up home and limit switches with the 4-axis pro board, ESS smoothstepper, and MACH3. The pro board has 5 pins available but I have read that when using the ess the switches should be connected there. Doing so would require a BOB for one of the other ports on the ESS. Can I wire the switches directly to the pro board and have them flow through the ESS to MACH3? I plan to use a NC connection with 2 switches wired in parallel for each X,Y,A (slaved with Y) axis. Would I need to add any pull up / down resistors?

    Mark

    #7584
    BrianV
    Keymaster

    There should be plenty of inputs as-is.

    ALL limit switches are wired in series (out of one, into the next) in a daisy-chain manner and all go to one input on TB5. It doesn’t matter WHICH limit is reached, you want to stop everything NOW.

    That still leaves 4 inputs – one for Z-home, Y-home, X-home (and A-home if you have it).

    The board already provides 10k pullups to +5V. Other than that, nothing is done to those 5 signal lines.

    I’ve attached a schematic if that helps in understanding. Let me know if you need more info!

    BrianV

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