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T3

After Setting Fail Safe, One Motor or ESC Won't Work

Posted by Richard Boyhan on August 10, 2012 at 4:41pm

I've been flying my Quad and having lots of fun.  After reading about fly away issues, I figured I better set my fail safe on my transmitter.  I have Specktrum DX8 and a UDrone Quad.  After setting the fail safe and testing on my work bench I wanted to fly my quad.  But once I got to the park, one of the motors would not spin.  I came home and have spent the last 2 days trying to figure out why it won't work.  I gone through the calibration steps, I've tried to resetting my APM2, but nothing seems to work.  Can anyone think of what is wrong or what I need to do to fix?

Thanks

Richard

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Tags: esc cailbration, fail safe
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Replies

  • T3
    Richard Boyhan August 11, 2012 at 9:40am

    I went ahead and partially disassembled my Quad and I found that the power distribution board connectors can be removed and moved around.  (Very Cool)  I'm not sure if I'm working with either motor 4 or 3, since after looking at the pin outs from APM2 it looks like I've been flying backwards all the time.  (not really an issue, just funny)  Anyway I moved the wires from my problem motor and the problem remained.  This tells me that my problem is either in the ESC or the motor or the wiring that connects the motor and ESC.  I plugged everything back the way it ways and I still have the issue with the one motor.  I tried recalibrating and all I get is a soft quiet chirp from the problem motor.  Anyone have any ideas on what might be the problem?

    Thanks

    Richard

  • T3
    Richard Boyhan August 10, 2012 at 6:16pm

    Hi Jason,

    I have calibrated successfully before.

    Not sure how to swap a motor, I'm guessing I'd have to unsolder and re-solder?  My Quad came mostly assembled.

    The cables look good.

    When I power on, all the motors do there little chirping and I end up with motor number 4 doing a soft quiet chirp.

    I've tried rebinding my transmitter, but that did not help.

    I looked into the CLI and testing, but which test would I use to test spin each motor?

    test] ?
    Commands:
      pwm
      radio
      gps
      ins
      battery
      tune
      relay
      wp
      altitude
      sonar
      compass
      optflow
      eedump
      logging

    Thanks for the help.

    Richard

  • Developer
    Jason Short August 10, 2012 at 5:12pm

    Have you calibrated your ESCs before and can you recognize the beeping sequence? I'd also swap the bad motor with a know good one to be sure nothing is physically wrong. That and recheck all you cables.

    Also, can you try the CLI motor test that spins each motor? 

    Jason

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