Discussions

Beta + or x?

Posted by Nigel on May 9, 2011 at 5:56am

From the beginning I have always set my Quad to the 'X' configuration but so far using the V2 beta code it has been VERY unstable.  I have noticed some people who have been testing the beta code saying it is absolutely fine and others saying that it is very unstable (like mine).  Just now I noticed that the instablility seemed to go around in a circle as if corrections to an attitude problem were being made at an 'angle' to where they should be - kind of like a phase angle issue with a conventional helicopter.

 

So, I wondered if everyone whose Quad is flying okay is indeed flying in the '+' configuration so I changed mine to '+' using the CLI and now it works absolutely fine!

 

Can anyone tell me if this is my problem or is it a 'virtual phase' issue in the code?

 

Thanks!

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

Join diydrones

Email me when people reply –
Follow

Replies

  • Moderator
    John Church May 9, 2011 at 7:20am
    I second the suggestion to take a look at X mode. My APM is very isolated (3 layers of gyro tape), changed props and motor shafts to eliminate vibes and still X mode is untunable in my case. Oscillations are diagonal along the arms and, as Nigel mentions, seem to end up circular...  Foxtrap IMU, APM 1.
  • Developer
    Max Levine May 9, 2011 at 7:03am

    You need to change APM board position for X frame.... ( if it is in correct position, so... there is some bug in there, you know beta :))

    ACM_X_frame.png?width=700

  • 3D Robotics
    Chris Anderson May 9, 2011 at 6:30am
    Good to know. We're testing in as many hardware/software configurations as possible, as quickly as possible, but with the code rev'ing by the hour in this early beta period there may be instability in some configurations. I'll pass this on to the dev team.
This reply was deleted.

Activity