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Help with APM 2.6 Quadcopter

Posted by Alec Seng on April 17, 2014 at 11:48am

My senior design team has built a quadcopter, and we are now in the testing phase. I have attached a video of our quad crashing shortly after it gets off of the ground. We suspect that it is a PID tuning issue. Does anyone have any advice or suggestions? Any help would be greatly appreciated.

IMG_1580 (1).MOV

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26, apm, drone, pid, quadcopter, troubleshooting, tuning

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Replies

Enrique Avalle April 20, 2014 at 3:41pm

Hi!

I ** THINK ** I know what is happening: your compass - magnetometer is upside down (at least on your config).

I had the exact same problem with my 3D Robotics hexa, using an APM 2.6 with external GPS / Compass: The gps / compass circuit has the gps on top and the compass / magnetometer on the other side of the circuit (heads down).

So you have to tell your firmware, thru Ardupilot, that your compass is roll_180 (or something like that) you surely will find it :)

Regards,

Enrique
- mohsein > Enrique Avalle October 26, 2014 at 2:42pm
  
  @Enrique Avelle
  
  Hello
  
  dont you think that this problem should be solved by callibrating the GPS and magnetometer?
  
  i ask it becaus i also have this problem!
  
  thank you if you can help
Alec Seng April 17, 2014 at 2:51pm

I have attached another video showing our PID tuning process. Does anyone know how to typically tell when it is flight ready? How is ours looking? Are there any suggestions?

IMG_0399.MOV

https://storage.ning.com/topology/rest/1.0/file/get/3701711604?profile=original