tinyg V9 external driver header connection

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  • May 23, 2016 at 1:40 am #9691
    MaxFrenzy
    Member

    I have a tinyG v9 that I’m interested in trying external drives with. I see the locations where attachments would be placed, but unlike the earlier tinyG’s, I believe these are designed for surface mount pins rather than through hole? Would I be looking for 1mm smd header pins? Perhaps someone could recommend what is required for this and if soldering present any issues. Ideally I’d like to put screw down terminals on them as well to make connecting/disconnecting faster in the future for when I no longer wish to use external drivers. Thanks for any advice.

    May 23, 2016 at 3:54 pm #9695
    cmcgrath5035
    Moderator

    I have a V9k version, thru hole pins.

    If you want external drivers, why not run G2 on a DUE?

    May 24, 2016 at 1:24 am #9701
    MaxFrenzy
    Member

    Sorry I wasn’t quite thinking clearly. For whatever reason, I wasn’t realizing they are part of the trace and thus filled in w/ solder. So, either 2.54mm pin headers or screw terminals would be fine it seems. As for using a due…good question. I do have one available and that probably is the right route to go. I want to clarify something though. While you can setup the pin assignments however you please w/ motate, for convenience and comparison, would it be fine to just use the gshield configuration even if you have no intention of using a gshield? Since I don’t want to break out any additional pins right now, it seems that would at least give me a common reference point and allow me to compare against the gshield for a little easier setup. Does that sound right?

    Thanks

    May 24, 2016 at 6:55 am #9706
    cmcgrath5035
    Moderator

    Sounds correct.

    The application (tinyG2) has no idea what is actually connected to the pins.
    Since you only have 3 drivers, using the Gshield pinout will allow you to bypass for now recompiling with a different pinout model.

    Keep in mind that DUE has no onboard port conditioning (pull ups, caps, etc) to when you move on to limit switches and other I/O, you have to take care of that.

    And, as always – DUE is 3.3V logic. You may need to buffer or logic level translate

    Also – you will have to set microsteps manually on the external drivers as well as power level.

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