Welcome to PhantomPilots.com

Sign up for a weekly email of the latest drone news & information

Compass Calibration Yes/No

Discussion in 'General Discussion' started by jp_flkeys, Sep 7, 2016.

  1. jp_flkeys

    Joined:
    Dec 19, 2015
    Messages:
    55
    Likes Received:
    3
    As a general rule I always calibrate my compass before lift off (I'm a safety kinda guy), however when I get to my next location which sometimes is 10 miles away, (once I was 40 miles from my last location) I turn everything on it tells me that my home point has been updated please check it on the map. I calibrate my compass regardless because I don't like taking chances, but does this mean its not necessary? Everything I've ever read says re-calibrate when you move to another location. I think when it says my home point has been updated please check it on the map means the satellites have found my new location but does excuse me from compass re-calibration. Am I correct?
     
  2. msinger

    Approved Vendor

    Joined:
    Oct 30, 2014
    Messages:
    18,849
    Likes Received:
    5,551
    Location:
    US
    Check out this thread for the best advice on when to calibrate the compass.
     
  3. Meta4

    Meta4 Moderator
    Staff Member

    Joined:
    Jan 8, 2014
    Messages:
    7,714
    Likes Received:
    3,436
    The link you've been referred to above should explain things.
    btw ... Your GPS records home point and the compass handles direction and flying straight.
    They are two different things and not related
     
    Falcon900 likes this.
  4. jp_flkeys

    Joined:
    Dec 19, 2015
    Messages:
    55
    Likes Received:
    3
    Ok thx
     
  5. jp_flkeys

    Joined:
    Dec 19, 2015
    Messages:
    55
    Likes Received:
    3
    Thanks for the thread, good info to know. Like I said I always re-calibrate regardless of where I am. Sometimes I have no option but to calibrate over asphalt or concrete, grass and open area isn't always available. Lights always flash correctly and the app always says I'm good to fly GPS, so I go for it. Lots of good info on that thread but I wonder...if I calibrate in a good area can I move to other areas without having to re-calibrate since maybe my next area might be over asphalt or concrete?
     
  6. msinger

    Approved Vendor

    Joined:
    Oct 30, 2014
    Messages:
    18,849
    Likes Received:
    5,551
    Location:
    US
    Per that thread, don't recalibrate the compass unless you move more than ~100 miles from the last place you calibrated the compass.
     
    jp_flkeys likes this.
  7. N017RW

    Joined:
    May 2, 2014
    Messages:
    6,236
    Likes Received:
    1,612
    Location:
    Palm Beach Co.- FL
    Not looking to dis-credit msinger but there is no set distance to require a compass cal.

    I have traveled 600 miles from a previous cal location with no re-cal required at the new location or upon returning home.

    My procedure is to launch the a/c and do a quick flight control check. If the a/c moves in a straight line then no worries, off I go.

    It has been about 1.5 yrs since I last cal-ed my P2.

    YMMV
     
  8. msinger

    Approved Vendor

    Joined:
    Oct 30, 2014
    Messages:
    18,849
    Likes Received:
    5,551
    Location:
    US
    No worries. I didn't write that thread :)

    The takeaway is that people should not obsessively calibrate the compass.
     
    N017RW likes this.
  9. GMack

    Joined:
    Jul 26, 2016
    Messages:
    542
    Likes Received:
    142
    I also do it, and IMU too, whenever an app update is made, like recent 2.9.1 in iOS. Some things just change there.

    I see some lagging bug when switching from photo to movie where the setting type (D-log, B&W, D-Cinemalike, etc.) will not change on first press. Have to hit some other color type and then the final one that shows on the screen's top title bar.
     
    jp_flkeys likes this.
  10. rustlecrowe

    Joined:
    Mar 29, 2016
    Messages:
    116
    Likes Received:
    45
    Ive had a similar experience where I recently travelled from Australia to Scotland and didn't recalibrate my p4's compass and it flew flawlessly in seriously strong and gusty winds and over water etc.. I took off over there and it flew very stable/straight etc so I figured why risk the chance of me calibrating the compass poorly
     
    N017RW likes this.
  11. Pete Leare

    Joined:
    Aug 6, 2015
    Messages:
    334
    Likes Received:
    105
    Location:
    Windham NH
    I just spent a week on Cape Cod flying my P3. I live in NH about 150 miles away. No calibration done, no problems.
    Came home and flew it again, no calibration done, no problems.
     
  12. jason

    Joined:
    Oct 12, 2014
    Messages:
    4,101
    Likes Received:
    404
    Location:
    Commerce Twp,MI
    The only time I recalibrate mine is if I have made modifications inside the craft or have had a serious crash then I will cal the IMU and compass. Asphalt an concrete without rebar will not present a problem requiring compass cal either.
     
    jp_flkeys likes this.
  13. jp_flkeys

    Joined:
    Dec 19, 2015
    Messages:
    55
    Likes Received:
    3
    Yeah I read that but guess it didn't sink in, thought that was pretty far, thanks.
     
  14. jp_flkeys

    Joined:
    Dec 19, 2015
    Messages:
    55
    Likes Received:
    3
    That's great to hear about the asphalt, where I live there is no rebar. I thought maybe the density was a problem or maybe a chemical used would be an issue. Thanks for the heads up...jp