Y6 with the shakes

Posted by Nigel Brown on March 31, 2014 at 4:10pm

Hi there

Hoping someone might be able to shine a light on this problem:

  • Stock 3DR Y6  B config
  • ESCs calibrated
  • Props balanced

Watch video

When I add some throttle, the frame shakes violently (as seen in the vid). I get the same result regardless on whether the copter is restrained or not.

When not restrained and I add throttle, there is uncontrollable yaw (spinning) -  RC stick input seems to improve this but not much.

I am sure there must be something simple that I am missing. Any suggestions?

Best

Nigel - Uaviation

You need to be a member of diydrones to add comments!

Join diydrones

Email me when people reply –
Follow

Replies

  • This reply was deleted.
    • Nigel Brown April 2, 2014 at 2:34pm

      Yes, thanks for your reply Brandon I have done calibration and test - all good. 

      I am going to run some detailed motor logs as Ed has suggested. I will take another look at compass mot while the motors are spinning.

      Stay tuned for the results!

  • This reply was deleted.
    • Nigel Brown March 31, 2014 at 8:52pm

      Hi Ed,

      Thanks for your thoughts - I have had motor logging on and have checked it - nothing jumped out at me. I am going to have another look.

      So if motor and PIDs look okay you think the airframe might be un-balanced? Would an un-balanced airframe have these symptoms when it is anchored or only when it is free?

      I will start by replacing the chip. If that doesn't work I will try the airframe. If that doesn't work I will try the bin!

      - I will keep you posted of the outcome 

  • This reply was deleted.
    • Nigel Brown March 31, 2014 at 6:05pm

      Thanks for your reply Brendan

      • New build (by me - not rtf) - yes
      • Props correct - yes
      • B config - yes
      • All motors and prop rotations confirmed - yes
      • All motors are working fine and correct order - yes

      I have several 3DRy6 running different chips, A and B configs etc etc..

      Those were all the first things I checked. I figure that this issue is a little more complex than a missed step in the setup process but it is good to do that double check.

    • Nigel Brown March 31, 2014 at 8:42pm

      Thanks Brendan - I will take a look at yaw calibration

  • This reply was deleted.
    • Nigel Brown March 31, 2014 at 6:08pm

      could be the most helpful answer - I would be interested if anyone else has experienced this and fixed it by replacing the chip.

      3DR - it would be good to hear from you if there is a known issue / fix??

    • Nigel Brown March 31, 2014 at 6:00pm

      Gidday Josh

      Hope all is well with you mate.

      The chip is a 2.5 modified to 2.6 (i.e. mag disconnect)

      I will try swapping in a Pixhawk - that will at least isolate whether it is a mechanical / frame issue or a tech / software issue I suppose. I'll give that a go tomorrow and report back.

    • Nigel Brown March 31, 2014 at 6:14pm

      Agreed - I have Y6s on APM too - I suppose it could be an issue with this APM. If I have some success swapping with a Pixhawk as Josh did, then I will swap in a different APM2.6 and see if the problem returns 

This reply was deleted.