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Thread: Dynamixel AX-18A ignores commands with Arduino

  1. Unhappy Dynamixel AX-18A ignores commands with Arduino

    Hi,
    I've been using 3 servos (2 AX-18A and one AX-12A) chained with an Arduino, and it was working very well.
    However, two months after without using it, I had big issues with each : the timing has become bizarre and random. For example, when oscillating between two positions, with a one second delay between the two, the servo only moves every 5-6 seconds (to debug I only use one now).
    I've tried changing Arduino board, PC, using a new servo, downgrading Arduino, for now nothing seems to work...
    With an oscilloscope, i saw that the commands are correctly sent to the servo, so I guess it just ignores some randomly, I don't know why !
    All help appreciated!

  2. #2

    Re: Dynamixel AX-18A ignores commands with Arduino

    Hard to give any advice as there is very little data to go on.

    Example how are the servos connected to the Arduino? Which Arduino?

    What code? Are you using some libraries? Which one? Do you have a simple example that is not working?

    You might also try posting on the Robotis forum.

  3. #3
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    Re: Dynamixel AX-18A ignores commands with Arduino

    Try some different wires, too, to rule that out.

  4. Re: Dynamixel AX-18A ignores commands with Arduino

    Thanks all for your help!
    Thanks to a teacher, I know the issue, a dumb one: I had forgotten to connect the Arduino's ground with the generator's, now it works like a charm!

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