Welcome to Multi-Rotor UK. Please login or sign up.

Monday,August 26, 2019, 05:32:14

Login with username, password and session length


24 Aug 2019 19:21:05
23 Aug 2019 19:26:42
I agree it does look a lot better for some reasom SMF shorten any recent posts display  :rolleyes:
23 Aug 2019 10:29:15
Nice! Looks loads better.  :beer2:
22 Aug 2019 22:47:32
Sorted mate  ~~
22 Aug 2019 10:27:36
Sure. But basically, all the subjects are getting cut off.
21 Aug 2019 18:14:54
Can you pm me a screen shot of what you mean
21 Aug 2019 12:15:41
Gaza - can you make the subject line section in the forum topic list wider? It's cutting off the subject field really short.
19 Aug 2019 09:14:20
Good for you!  ~~
18 Aug 2019 19:13:57
Had another negative encounter, it's been a few years since the last one, just an uneducated ******, going on about drones being illegal yada yada yada.    :-/
Still that didn't spoil my flying time, had an absolute blast  ~~
07 Aug 2019 19:52:01
ooooh mrs jones  :D
  • Total Members: 8066
  • Latest: badger1
  • Total Posts: 196588
  • Total Topics: 19805
  • Online Today: 60
  • Online Ever: 530
  • (Tuesday,June 26, 2012, 08:34:46 )
Users Online
Users: 0
Guests: 33
Total: 33

Theme Changer

3d - Printworx

Printing 3d Forum

how does the compass in the apm 2.5 suppose to work ?

Started by optiplex, Thursday,May 23, 2013, 05:27:11

Previous topic - Next topic


Hey guys and girl :)

yesterday after lots of issues i erased eeprom and downgrade upgrade fw, at the moment i have 3 rc2 and the gyros work good, the quad is stable and alt hold good
but ofcorse after eeprom erase the compass declination and settings and whatever are erased also

so i understand if i use auto declination, it suppose to gather data over few flights with gps is that right ? still didnt do those flights

what happens now, is when i connect with mission planner i see same degree all the time, i yaw the quad the number changhes but always return to same number that was 230

i did manual calibration (the stupid dance) so it changed the offset and now it always return to 83

what does it supposed to show ? the heading the quad is facing and stay there, right ?


yes it should stay at the oreintaion the quad is in to the compass heading it shouldnt drift back to another heading

I have had a few flights with compass in auto and in manual and notice no difference so not sure which is best opti

550 RC Spider quad for FPV
550 Alien quad (my sons now)
F450 quad
450 size bell 212, MD500,Augusta 109
600 size Huey running apm 2.5  3 planes  Taranis and 9xr  radios Skyzone FPV goggles


Quote from: firey1 on Thursday,May 23, 2013, 05:54:51
yes it should stay at the oreintaion the quad is in to the compass heading it shouldnt drift back to another heading

thx firey

i tried the stupid dance, and entered manual declination, still returns to same heading
so i will try few flights with auto dec, hope it helps


Personally, this is what I do on the 3.0-rc code:

Turn off auto-declination and auto-learn
Do the compass dance, using randy';s method (face each axis north and spin)
Setup battery/current monitor and then do compassmot. Be careful doing this!

That seems to be pretty good for me on both hexa and reptile - (though I have an air-frame yaw issue on the hexacopter I think).

I have also manually tuned declination on the hexacopter - setting TUNE to 38 and range from 0 to 1000 (if doing it by mavlink direct, which is what I do - maybe range 0 to 1.0 in planner, not sure). I didn';t bother on the reptile as that hasn';t needed it.

I';m afraid I don';t use mission planner much, so I';ve no idea what my compass is actually pointing to - can';t help you there.