ERROR COMPASS VARIANCE

Hi all,

I'm having trouble calibrating my compass on my quadcopter. I'm using an external GPS/compass that I got from China (not 3DR brand). It's attached via a mast to a Pixhawk clone, which I think has the newest firmware (I just updated it on Sunday). I performed the compass calibration in MP, selecting the Pixhawk option and saying that I'm using firmware AC 3.3. When I do the calibration, the offests I get are gigantic - up in the 2000s and 2500s. On the Flight Data page of MP, the copter always seems to know which direction it's pointed. But, since the offsets are way high, it doesn't want to arm (unless I turn off that particular prearm check), and I get lots of failsafe alarms when I'm flying, due to what I think is the EKF / DCM Check & Failsafe.

Can anyone help me figure out why I'm having such trouble? The compass is on a mast, and it won't get a good calibration even when away from as much metal as possible.

Thanks!

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

Join diydrones

Email me when people reply –

Replies

  • I've had this happen when using a hexacopter in a GPS denied environment. Do you have a GPS lock?

  • Those are very high offsets.  Something is wrong with that compass.  Offsets are caused by metal or magnet interference that are compensated for.  Numbers above 500 are bad.

    Buy a cheap compass for camping and set it near your compass and see if it moves around.  If not your China compass is probably bad.

  • hi,

    error compass variance occurred after i did compass calibration,it shows on HUD but if i arm motor ,it gets arm.

    please help me how to fix this issue

    error compass variance.png

    https://storage.ning.com/topology/rest/1.0/file/get/3702264752?profile=original
This reply was deleted.

Activity

DIY Robocars via Twitter
RT @chr1sa: Donkeycar 4.4 released with tons of new features, including path learning (useful with GPS outdoors), better Web and Lidar supp…
yesterday
DIY Robocars via Twitter
RT @NXP: We are already biting our nails in anticipation of the #NXPCupEMEA challenge! 😉 Did you know there are great cash prizes to be won…
Friday
DIY Robocars via Twitter
RT @gclue_akira: レースまであと3日。今回のコースは激ムズかも。あと一歩 #jetracer https://t.co/GKcEjImQ3t
Friday
DIY Robocars via Twitter
UC Berkeley's DIY robocar program https://roar.berkeley.edu/
Friday
DIY Robocars via Twitter
RT @chr1sa: The next @DIYRobocars autonomous car race at @circuitlaunch will be on Sat, Dec 10. Thrills, spills and a Brazilian BBQ. Fun…
Friday
DIY Robocars via Twitter
RT @arthiak_tc: Donkey car platform ... Still training uses behavioral cloning #TCXpo #diyrobocar @OttawaAVGroup https://t.co/PHBYwlFlnE
Nov 20
DIY Robocars via Twitter
RT @emurmur77: Points for style. @donkeycar racing in @diyrobocars at @UCSDJacobs thanks @chr1sa for taking the video. https://t.co/Y2hMyj1…
Nov 20
DIY Robocars via Twitter
RT @SmallpixelCar: Going to @diyrobocars race at @UCSDJacobs https://t.co/Rrf9vDJ8TJ
Nov 8
DIY Robocars via Twitter
RT @SmallpixelCar: Race @diyrobocars at @UCSDJacobs thanks @chr1sa for taking the video. https://t.co/kK686Hb9Ej
Nov 8
DIY Robocars via Twitter
RT @PiWarsRobotics: Presenting: the Hacky Racers Robotic Racing Series in collaboration with #PiWars. Find out more and register your inter…
Oct 23
DIY Robocars via Twitter
RT @Hacky_Racers: There will be three classes at this event: A4, A2, and Hacky Racer! A4 and A2 are based around UK paper sizing and existi…
Oct 23
DIY Robocars via Twitter
Oct 23
DIY Robocars via Twitter
Oct 19
DIY Robocars via Twitter
Oct 18
DIY Robocars via Twitter
RT @NeaveEng: Calling all UK based folks interested in @diyrobocars, @f1tenth, @donkey_car, and similar robot racing competitions! @hacky_r…
Oct 13
DIY Robocars via Twitter
RT @araffin2: 🏎️ After hours of video editing, I'm happy to share a best of my Twitch videos on learning to race with RL. 🏎️ Each part is…
Oct 13
More…