Problem with 'bouncy' quad driving me nuts any idea's??

Posted by Richard Kennedy on April 3, 2015 at 4:19pm

I have set up 3 quads now but for some reason after installing a new pixhawk on this quad [ that flew fine with another pixhawk ] I cannot get rid of this 'bouncy' quad. I have tried auto tune, high pids, low pids and nothing seems to fix it. Here's a video link on you tube. Sorry it's not great kinda hard to do yourself. Here's a log too. ps I accidentally bumped auto tune mode by mistake for a second disregard that. The pixhawk is mounted securely with gel pads. Any suggestion would be greatly appreciated!! 

Pixhawk
1100 kv T- motors
11.1 v 3c batt
all in one 30 amp esc
10 x 4.5 props
you tube link

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Replies

  • James Mark Borgaily April 7, 2015 at 8:18pm

    I would not recommend T motors, on the AC 3.2.1, they just dont work that well. I noticed your PIDs are extremely high, try starting from default and work step by step. IN case its not PIds, replace motors and test again. GOOD LUCK

    Try this replace to 800kv motors and 10x5 graupner props, the Magic is there.

    • Richard Kennedy > James Mark Borgaily April 8, 2015 at 3:48pm

      T motors come in many different varieties you think they are all bad? 

      4.5 PID is high? 

      Thanks for the input :] 

    • James Mark Borgaily > Richard Kennedy April 10, 2015 at 11:26pm

      I have tried the new Air Gear series of T motors and no matter what prop combination they just keep jumping the quad. Stabilize no problems but on alt hold it just goes off to a good jumping behavior

    • Cala > Richard Kennedy April 9, 2015 at 9:29am

      4.5 is the standard,perhaps you can low it and test

  • Richard Kennedy April 7, 2015 at 4:14pm

    Does the pixhawk continue to learn doing auto tune more than once?? 

    • Willy Fernandez > Richard Kennedy April 7, 2015 at 6:04pm

      Just a suggestion: Try putting 9x4.7 prop slow fly. Of course, you will have higher THR_MID...you will see magic.

    • Richard Kennedy > Willy Fernandez April 8, 2015 at 3:46pm

      Thanks for the suggestion. What did you notice better than the 10x4.5? Higher rpm / more responsive? 

    • Willy Fernandez > Richard Kennedy April 8, 2015 at 4:45pm

      You are right...higher rpm/responsive. With your set up, if you go back to AC3.1.5, your copter will not bounce...However, AC3.2.1 is the best thing that happen to Arducopter...You have to find the best motor/prop combination. For testing purposes, fly on alt_hold at around 3m alt and check if the"bouncing" is gone...hope this helps.

      . 

    • Richard Kennedy > Willy Fernandez April 8, 2015 at 5:57pm

      Just ordered a set... can't wait to try them out.

    • Cala > Richard Kennedy April 7, 2015 at 6:02pm

      I suppose that

This reply was deleted.