Futaba 14SG and APM 2.5+ issue.

I recently switched from my trustworthy old DX7 with AR7000 RX to the new Futaba 14SG FASSTest system with telemetry and R7008SB RX. I installed the new Futaba RX and calibrated everything in mission planner. Now my quad has a random twich where on of the mortors suddenly increases in speed just enough to cause a significant jerk, it happens about every 5-10 seconds and increases with flight time. I'm afraid to fly more than a few feet off the gound. I assume it has something to do with the PWM or PPM from the futaba and some sort of conflict with the APM 2.5? I have switched back to the DX7, anyone having the same issue? any known fixes?

 

Frank

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Replies

  • Tristan, what are you using for your second rx? I will be doing this as well for my 3axis gimbal.

  • Hi,

    I have a 14SG with R7008SB and APM 2.5 (bought a month ago) and I have no problem so far :)

    Maybe the PPM is already up to date ?

    Tristan

  • Problem solved! After following these instructions http://code.google.com/p/ardupilot-mega/wiki/APM2Encoder   I'm able to use Futaba FASSTest telemetry R7008SB receiver without any twitching.

     

    Frank

  • Hi Frank.

    Basically you need to update your PPM encoder on the APM board.

    Quite a long thread, but hopefully it'll give you some background to the issue with Futaba radios and how to perform the update.

    http://diydrones.com/forum/topics/motors-twitching-in-flight

    All the best,

    Steve
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