Super Weird Issue! Un flyable Quad

Not even sure how I am going to describe this one!

 Its a repeatable problem and it all started when I was flying my quad in the air and all the sudden flip fall boom! Thought I had a battery or "brown out" but I checked the batteries and they still had about 40% left.

So I go home multiple resets, multiple eepom erases and calibrations etc! I am using the Q Brain ESC and it was working fine for the most part except for the auto tune didn't work as expected (someone chimed in and thought maybe a motor  / esc / apm timing issue, but I flew it for a while on default pids worked great!

Now for the PROBLEM!

Plug ESC IN, plug APM with its power (tried with shared battery and also USB source to measure the APM throttle output to each motor using the fail safe screen in mission planner. I arm and I power it on and the motors spin sometimes LOCK on and wont  go off (doesn't change with tilting either) then when i unplug the APM one of the motors spins really fast for a second then stops. Other times I plug in the ESC  /APM and the motors turn and then stop and mission planner stops updating and the motors are still spinning (I have mot armed spin OFF)

I have attached the LOG but I am not sure what settings in the log i should enable to capture more data.   ANY INPUT is appreciated!

1.log

2.log

You need to be a member of diydrones to add comments!

Join diydrones

Email me when people reply –

Replies

  • For those following, the motors always spinning has been fixed, I use APM Planner V2, it then made my quad send out 1050pwm instead of 1100 that mission planner said.

    If someone can let me know where to report this issue please advise.

    • 3D Robotics

      Please report APM Planner issues here

      • APM Planner is what worked, mission planner did not.

        Just flew the quad and confirmed all 100% working now.

        Mission planner sent 1100 PWM when armed on APM Planner it sent 1050 pwm, the 1100 was to high, it could be a param somewhere but those two default values don't match up.

        • Hi ..in MP you can select Motor Armed speed .. try to set it lower so you dont get a fast spin on the motors when armed ...

          • Hi, the issue at hand is that its spinning when NOT armed, so that  param shouldnt effect this issue at all. And it was already set at 0 but thank you for the insight, problem is solved just have to use Apm planner

  • I have a similar problem with the qbrain I can calibrate it with the pixhawk and it works fine until I start it in normal mode. Then the throttle has two settings idel and full.
    • I am going to try flashing 3.1 using APM planner vs mission planner, as mission planner has been going through a lot of updates recently, I had this set up working fine, I am thinking some software bug or wrong param, or my apm's hardware has failed on me

  • I didn't fly it outside but I did a test to calibrate ESC see if my issue was fixed.

    I first tried calibrating my motors the normal way ( high throttle on power up then reboot) all went well, then I unplug everything and plug it back in and the motors spin without even arming it, the APM is sending out to high of a signal by default they just spin slowly.

    I tried calibrating them by arming the quad then plugging in the esc while at high throttle, it did calibrate them but because of the APM's throttle output filtering when its supposed to fly wasn't a very good calibration, re calibrated using the original method and again same problem they spin as soon as there plugged in.

    I was holding the quad in hand and seemed to be have really strange, I tested to make sure all the wires were connected in right order and it still tilts the correct way when I  use my stick, to scared to actually let go of this thing though seems like it has a mind of its own.

    • Update, Tried another of the exact same model ESC and same issue, the motors are getting to high of a signal right away, is there a way to measure this? On apm when connected to my computer and in the fail safe screen says its outputting 1100 is this normal?

      I tried a flight and it didn't work either, kinda just spun out of control quickly when the APM tried to "correct" it self, might try apm on another computer reset reflash etc etc. is there a way to ensure everything is completely wiped?

  • WELL! 

    Looks at my wires leading to my Minim OSD, the RX  and 5v pin was broken and may have been hitting the RX pin with the vibrations of the motors? No clue but removed minim osd...seems to work will update tomorrow for an inflight. then will try with the minimosd with a fixed wire.

This reply was deleted.

Activity

DIY Robocars via Twitter
RT @a1k0n: @DanielChiaJH @diyrobocars @circuitlaunch Here's my car's view of that race. About 8.4 second lap times for laps 2 and 3... both…
Monday
DIY Robocars via Twitter
RT @DanielChiaJH: Great racing against @a1k0n today at @diyrobocars! Pretty cool to both break sun-9s at the track today I think I got very…
Sunday
DIY Robocars via Twitter
Broadcasting the @circuitlaunch race live now at https://m.twitch.tv/diyrobocars Races begin around 2:00pm PT
Saturday
DIY Robocars via Twitter
RT @a1k0n: ran a huge number of hyperparameter tuning experiments yesterday; now I can train a new policy, far with better quality, in 15 m…
Saturday
DIY Robocars via Twitter
RT @a1k0n: Did I get rid of hand-tuned parameters? Yes. Am I still hand-tuning more parameters? Also yes. I have a few knobs to address the…
Sep 26
DIY Robocars via Twitter
RT @a1k0n: I'm not going to spoil it, but (after charging the battery) this works way better than it has any right to. The car is now faste…
Sep 26
DIY Robocars via Twitter
RT @a1k0n: Decided to just see what happens if I run the sim-trained neural net on the car, with some safety rails around max throttle slew…
Sep 26
DIY Robocars via Twitter
Sep 24
DIY Robocars via Twitter
RT @SmallpixelCar: @a1k0n @diyrobocars I learned from this. This is my speed profile. Looks like I am too conservative on the right side of…
Sep 24
DIY Robocars via Twitter
RT @a1k0n: @SmallpixelCar @diyrobocars Dot color is speed; brighter is faster. Yeah, it has less room to explore in the tighter part, and t…
Sep 24
DIY Robocars via Twitter
RT @a1k0n: I'm gonna try to do proper offline reinforcement learning for @diyrobocars and throw away all my manual parameter tuning for the…
Sep 23
DIY Robocars via Twitter
RT @circuitlaunch: DIY Robocars & Brazilian BBQ - Sat 10/1. Our track combines hairpin curves with an intersection for max danger. Take tha…
Sep 22
DIY Robocars via Twitter
RT @SmallpixelCar: Had an great test today on @RAMS_RC_Club track. However the car starts to drift at 40mph. Some experts recommended to ch…
Sep 11
DIY Robocars via Twitter
RT @gclue_akira: 世界最速 チームtamiyaのaiカー https://t.co/1Qq2zOeftG
Sep 10
DIY Robocars via Twitter
RT @DanielChiaJH: Always a good time working on my @diyrobocars car at @circuitlaunch. Still got some work to do if I’m to beat @a1k0n howe…
Sep 10
DIY Robocars via Twitter
RT @SmallpixelCar: My new speed profile for @RAMS_RC_Club track https://t.co/RtLb7TcgIJ
Sep 10
More…