Hi all,
I need your opinion on some calibration data I got from the last pixhawk I have received:
COMPASS_OFS_X,-102
COMPASS_OFS_Y,-4
COMPASS_OFS_Z,267
COMPASS_OFS2_X,84
COMPASS_OFS2_Y,-325
COMPASS_OFS2_Z,-312
in the 20 minutes I was working on something else I had several "BAD COMPASS HEALTH" notification.
I also have an APM 2.6 and the same type of compass(UBlox)
the calibration data of the APM is
COMPASS_OFS_X,-56.83081
COMPASS_OFS_Y,-4.790942
COMPASS_OFS_Z,-19.75378
Calibration has been done in the same room under identical conditions.
Can you please tell me if this Pixhawk and Ublox is safe to use or not?
Thanks in advance!
Tom
Replies
Indoors or outdoors?
Any RF transmitting stuff near the actual GPS ?
Pictures of your installation ?
The only thing "Safe" is to sit in your favourite chair, and drink purified water :-)
Testing has been done indoors
Pic attached.
with all the junk in orbit my favourite chair is not safe at all :-)
IMG_0520.JPG
Compass calibration should only be done when installed on your airframe just before the first flight as it takes into account all the metal (screws, wire, etc) on the airframe and it's location relative to those metal bits. If you do it now it will have to be done again anyway when it's ready to fly. It should always be done outside away from cars, metal roofs, railings, etc. Apparently even underground pipes and cables can have a small effect.
Graham,
I will definitely do a re-calibration once it is in the air-frame, if I ever put it in an air-frame. I don't want to wreck my Maja, and my fx-79 is pretty unstable since the crash with the Pixhawk.
I am unsure if I should try this at all or should I just send it back to the supplier.This is the second Pixhawk with compass problems that I am getting from the same supplier. The first one crashed 2.2km from takeoff location and the entire flight looked like the flight of a drunk duck.
Question:
Is it possible for an EM/magnetic field to have a permanent/long lasting effect on the magnetometer?
Which FW version you suggest to use? 3.0.3 or 3.2?
Yeas I have, about 5-6 times.
No luck.