Welcome to PhantomPilots.com

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

Tags:
  1. rocco pienaar

    Joined:
    Jun 19, 2016
    Messages:
    11
    Likes Received:
    0
    I had a motor fail on me..... From a hover in GPS mode to an uncontrollable decent. 30 hours on the motors....
     

    Attached Files:

  2. ftttu

    Joined:
    Apr 12, 2016
    Messages:
    381
    Likes Received:
    126
    Since this is one of our biggest fears, I would love to see DJI put out motor life information so we can change them out at safe intervals. I just don't know if it is worth more to them selling a replacement bird as opposed to selling countless replacement motors.
     
    top boy roy likes this.
  3. JWarren

    Joined:
    Jun 19, 2014
    Messages:
    773
    Likes Received:
    119
    Yes, its just a matter of time for all of us. I just hope to get the maximum amount of hours out of my motors that I can. As you said, it would be nice to have some idea of the lifespan. 30 hours seems a bit short though.
     
  4. Phantomix

    Joined:
    Sep 6, 2014
    Messages:
    334
    Likes Received:
    51
    Location:
    Weston, MA
    how common are motor failures?
     
  5. JWarren

    Joined:
    Jun 19, 2014
    Messages:
    773
    Likes Received:
    119
    Likely second only to pilot error in my opinion.
     
    ROD PAINTER likes this.
  6. rocco pienaar

    Joined:
    Jun 19, 2016
    Messages:
    11
    Likes Received:
    0
    here is the flight.......


    Sent from my iPhone using PhantomPilots mobile app
     
  7. dronejunkyev

    Joined:
    Jun 18, 2016
    Messages:
    23
    Likes Received:
    14
    Wow


    Sent from my iPhone using PhantomPilots mobile app
     
  8. efexor

    Joined:
    Dec 20, 2014
    Messages:
    32
    Likes Received:
    22
    Do we need to change the motors after some hours of flight?
    has dji announced anything on this?


    Sent from my iPhone using PhantomPilots mobile app
     
  9. Rockley Montgommery

    Joined:
    Jun 30, 2016
    Messages:
    6
    Likes Received:
    2
  10. phantom3menace

    Joined:
    Jul 10, 2015
    Messages:
    208
    Likes Received:
    92
    Okay, I just bought a P4 and so far I'm liking it. But now seeing this thread has me worried....
     
  11. jwt873

    Joined:
    Apr 4, 2016
    Messages:
    308
    Likes Received:
    107
    Location:
    Woodlands, MB Canada
    This isn't something to lose sleep over.

    With the original poster's motor, the outer case (the rotor) has slid off the field coil assembly (the stator). The outer case is held in place by a circular clip snapped into a groove on the bottom of the propeller shaft. These don't normally break or come off. It's highly unusual.

    This link shows a disassembled brushless motor. In the first image look to the far left for the 'circlip e-ring'. Disassembling a Brushless Motor

    I'm guessing the clip was installed improperly during the manufacture of the motor, or perhaps it wasn't installed at all and the shaft was being held by the friction of the bearings alone. Over time things worked loose.

    One thing that should be done before each flight is to check the 'feel' of the motors. I pull up and down on the case to see if there is any vertical play (there shouldn't be). Then, with the props on, I flick each prop with my finger hard enough to cause the motor to spin 3 - 4 times. They should all spin freely. Any strange noise or binding is a sign there are problems.
     
    ROD PAINTER likes this.
  12. phantom3menace

    Joined:
    Jul 10, 2015
    Messages:
    208
    Likes Received:
    92
    ^ Well I hope you're right. We all know flying these expensive toys is already a gamble as is. I certainly wouldn't want to add to the mix of possible things that can or could go wrong.

    I can see it now, I'm flying above some lake and one of my motors takes a puke. The AC falls in to the lake and it's gone forever. Meantime, DJI tells me to screw off because I have no evidence to give them.

    Ugggghh.....
     
  13. rocco pienaar

    Joined:
    Jun 19, 2016
    Messages:
    11
    Likes Received:
    0
    Yes good question what is the motor lifespan and what maintenance is required ?


    Sent from my iPhone using PhantomPilots mobile app
     
  14. Marcel

    Joined:
    Jun 18, 2016
    Messages:
    8
    Likes Received:
    0
    so DJI doesn't replace a P4 when their product fails within guarantee?!
     
  15. N017RW

    Joined:
    May 2, 2014
    Messages:
    6,241
    Likes Received:
    1,614
    Location:
    Palm Beach Co.- FL

    Hundreds of operating hours can be expected.

    BLDC motors have one moving/wearing part, the bearings.
    The motors, short of trauma, will likely outlast your quad.

    Bearing failures can be determined by feel or an elevated motor temp as compared to the others.
    These bearings are of a sealed variety so there is no maintenance other than remove foreign material that may enter due to storage or dirty environments.
     
    ROD PAINTER likes this.
  16. phantom3menace

    Joined:
    Jul 10, 2015
    Messages:
    208
    Likes Received:
    92
    DJI isn't going to replace anything if and when your machine falls in the middle of a lake or ocean and you can't retrieve it. That's when you're seriously SOL if/when the crash is a result from a manufacturer defect.
     
    rocco pienaar likes this.
  17. m0j0

    Joined:
    Dec 26, 2015
    Messages:
    1,533
    Likes Received:
    530
    I really don't know any companies that will replace a unit that is not recovered.
     
  18. jwt873

    Joined:
    Apr 4, 2016
    Messages:
    308
    Likes Received:
    107
    Location:
    Woodlands, MB Canada
    There still is evidence in the form of the logs kept by DJI-Go on the device that was being used with the remote control.

    If the log shows that one motor stopped in mid-flight over the middle of a lake, that might be grounds for a 'recoverless' warranty claim.
     
  19. N017RW

    Joined:
    May 2, 2014
    Messages:
    6,241
    Likes Received:
    1,614
    Location:
    Palm Beach Co.- FL
    What DJI decides is anybody's guess but telemetry data does begin to change the the game when it comes to blame.
    Such as pilot error or on-board failure.
     
  20. rocco pienaar

    Joined:
    Jun 19, 2016
    Messages:
    11
    Likes Received:
    0
    Fighting with them right now..... Will wait and see what the outcome is