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  1. #1
    RC Qualifier
    Join Date
    Apr 2012
    Location
    Orlando,Florida
    Posts
    484

    Bucking under low speeds?

    I have no clue but everytime i try to drive at low speeds my KB bucks and stutters for some reason, i have no clue why its been doing this? Maybe a new motor would help?
    Rustler Vxl,Slash 2WD,Slash 4X4,SPC Lipos

  2. #2
    RC Champion
    Join Date
    Apr 2011
    Location
    woodstock .on.canada
    Posts
    2,207
    just cogging
    wait does it emit a whine when it stuters?

  3. #3
    RC Qualifier
    Join Date
    Apr 2012
    Location
    Orlando,Florida
    Posts
    484
    no, no whine it just stutters or cogs, how do i fix cogging?
    Rustler Vxl,Slash 2WD,Slash 4X4,SPC Lipos

  4. #4
    Marshal Double G's Avatar
    Join Date
    May 2008
    Location
    Putting the wet stuff on the hot stuff
    Posts
    9,791
    Taking it from here: http://rcnuts.com/brushlessfaq.htm
    What is "cogging"? Cogging, as mentioned above, is a phenomenon that occurs with sensorless brushless motor systems at initial starting speed, and it goes away immediately after moving. It's caused by the ESC taking a moment when you hit the throttle to "read" the motor position and react. It can be described as a minor "glitching" or "jitter" at the moment you hit the throttle. It can be decreased or almost completely eliminated by lowering the gearing. Different ESC's can have different cogging symptoms too. It's hardly notable if your system is set up correctly, but folks who plan to do low-speed high-power maneuvers like rock-crawling or intricate and detailed track racing, should consider the possibility of this affecting their fun.
    The Super Derecho

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