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    Can anyone help please?
    by Brianaro πŸ‡¬πŸ‡§ ( Petty Officer 2nd Class)
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    16 Posts 15 Replies 4 Photos 15 Likes
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    andyhynes
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    πŸ“ Can anyone help please?
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    Country: πŸ‡¬πŸ‡§ United Kingdom
    Online: 22 hours ago
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    An answer to your question about any damaged or burnt wiring. The black lead from the speed controller to the RX was completely burnt through, however the receiver has worked fine since i replaced the speed controller.
    RNinMunich
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    Country: πŸ‡©πŸ‡ͺ Germany
    Online: 13 hours ago
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    Hi Andy,
    Sounds like you may have had something else connected to the RX which put a short (or a heavy impulse load) across the BEC supply line! Was there any other obvious damage to any wiring? Doug
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    Young at heart - slightly older in other places πŸ˜‰ Cheers Doug
    Brianaro
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    Hello. It’s strange, no one I’ve asked have an answer, Mtronics didn’t have an immediate answer when I phoned and asked for it to be returned, see what they say.
    andyhynes
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    I had the same problem with a V40 Speed Controller. Used several times, until i switched on the the power through the RX and a proper smoke out. Controller was completely burnt out through the power switch. Still cannot understand Why?. A new Speed Controller was purchased, no problems since.
    1
    Brianaro
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    Thank you once again. I’ll keep you posted re the speed controller
    Regards Brian
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    RNinMunich
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    Hi Brian,
    The Mtronics guys seem a reasonable bunch so I hope they'll send you a replacement 🀞
    Re: fuse, my measurements on the Sea Scout with the same rating motor you have and 3S LiPo never showed more than about 8Amps current at full chat so I have fitted a red 10A car blade fuse.
    Clearly visible in the pics I've posted. My ESC is also rated 30A. But I wouldn't fit more than a 15A fuse at most with that motor. Some might go to 20A but while protecting the ESC Ok that may risk damage to the motor or wiring before it blows.
    Was glad to see that the RX had survived OK πŸ˜‰
    Good luck with MtronicsπŸ‘ Cheers, Doug 😎
    2
    Young at heart - slightly older in other places πŸ˜‰ Cheers Doug
    Brianaro
    Petty Officer 2nd Class
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    Hello Doug. I spoke with Mtronics today and they know of no reason why this should have happened. The helpful man asked me to return the speed controller for them to investigate. I will keep you informed.
    Regarding fuse in the battery feed I’m unable to identify the stall current of the motor. Current rating for speed controller is 30 amps, what fuse would you suggest?
    Thank again
    Cheers Brian
    Brianaro
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    Hello again
    I will. It’s strange I havent had the problem before either. Yes I have tested the receiver on the rudder servo and all is well there fortunately
    Regards Brian
    1
    RNinMunich
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    Bon chance mon ami!
    Would be good to know what went wrong, to help others avoid the problemπŸ‘
    I also have several Mtronics ESCs; Viper Marine versions.
    Not had any problems ..... YET πŸ˜‰
    Cheers, Doug
    PS A quick thought! Have you tested the RX with just a servo connected after the disaster?
    You'll need a separate RX battery (4.8 to 6V) to do this of course.
    1
    Young at heart - slightly older in other places πŸ˜‰ Cheers Doug
    Brianaro
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    Hello Doug. Thank you again, i appreciate your help, i’ll phone Mtronics on Monday and see what they suggest before I wreck a second speed controller. The good news is the smell has very nearly left the room!.
    Thanks again, if I get an answer I’ll let you know
    Cheers Brian
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