3D-Welder

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  • August 6, 2014 at 9:20 pm in reply to: No voltage at coolant pin ? #6601
    3D-Welder
    Member

    ​
    Oh man am I embarrassed.
    I’ve been checking for voltage by probing the top of the terminal screw with no wire attached.
    While out for a walk it occurred to me to install a short length of wire to attach the V meter to.
    Proper voltage is at the coolant pin, the device I’m try to control will turn on / off.
    It seems odd that the top of the metal screw has no conductivity without pinching a wire but that’s exactly the problem.
    Please accept my sincerest apologies.

    August 6, 2014 at 5:50 pm in reply to: No voltage at coolant pin ? #6598
    3D-Welder
    Member

    further troubleshooting
    I found and download the TinyG schematic v8h and the pinout/block diagram for the XMEGA A3 chip
    By the schematic it is a direct path from the coolant back to pin # 36 on the chip
    3.4v is present at the chip yet not at the coolant pin ???
    Cycling M7 / M9 does not alter the voltage at the chip. It is always 3.4v
    The LED indicating coolant on / off does light properly.
    The LED indicating spin direction also lights properly.

    see the project here :
    http://molten3d.blogspot.com/

    • This reply was modified 11 years, 7 months ago by 3D-Welder.
    • This reply was modified 11 years, 7 months ago by 3D-Welder.
    August 5, 2014 at 11:43 pm in reply to: No voltage at coolant pin ? #6587
    3D-Welder
    Member

    Alden
    should I assume it’s a board problem not a firmware issue ?
    is there a problem solving path I should try for the firmware ?

    Thanks
    Steve

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