Hi Everyone.
Recently got into ArduCopters, and have a standard 3DR frame with the 850 motors, APM1 etc. Radio I use is a Spektrum DX8.
Being a total noob, I have been the cause of a number of crashes and I can live with that, however for the second time now, my quad has just fallen out of the sky. It was flying quite stable (2.5.1) and alt-hold, loiter and RTL all worked quite well, although I do have some yaw issues, but I will save that for another day.
What happend today and also about 2-3 weeks ago, is that it's flying along as expected, responsive etc, and then nothing, not throttle, I could see the props stopped, turned turtle, and met the ground with some force, damaging all four motors. Luckily I learnt from last itme and bought one of those boxes which protected the APM.
Also since the last crash I have moved the power to a different ESC.
So it's the same field, and was about the same distance away from me (about 150-200 meters), when it crashed. Looking at the logs, you can see the Throttle, Pitch, Roll in all just die. Could it be a range issue?
.log file and a pic of the graph attached.
Appreciate any help!
Replies
Well bumping a old thread of mine as I still seem to be struggling with the quad dying on me and crashing. I am now running a APM 2.5 version 2.9.1b
Been playing around with Auto flight modes over the last few weeks, and I have had mixed results.
First test, I set a planned flight and set the quad off. It completed the flight ok, and landed pretty much where expected. After a few minutes I then started the mission again, and when it got to the furthest point away, it lost all power and dropped out the sky. Fortunately some stinging nettles broke the fall, and apart from a nicked prop no other damage.
Looking at the logs and KMZ files, it seems it was flying fine then FS, and then it went into stabilze mode...
First flight, completed ok.
Second flight crash:
Log file:
So onto another day and a different flight plan (and location), and again first flight was fine, returned and landed as expected, however second flight ended in a crash.
First flight OK:
Second flight crash (excuse the crude writing):
Log file:
This is my failsafe settings:
What I don't understand is what is triggering FS. Will this only happen if radio range comes in play? Looking at the second crash, it does look like it FS to RTL (which is what I set it to do), but why did it loose all throttle? I may have panicked and kicked in the final Auto mode, but I doubt it.
Would appreciate any thoughts on this.
Is the APM fail safe not when you set the rx to output less than 950uS. That way the APM knows it's all gone Pete Tong and it needs to do what you preset i.e. RTL. it's got nothing to do with channel 7.
Just found it: http://code.google.com/p/arducopter/wiki/AC2_Failsafe
That seems like the APM failsafe?
I could also be on totally the wrong track...
Hello,
I have the same Problem like you, and i have a DX8 too.... :/
But this error i have only 2and time! I fly now over 3-4hours with my new APM2.0 from the V2.4 -> 2.5.3, have no problems like this....
And i hope i dont have this "error" in high altitude ....
https://www.youtube.com/watch?v=5NPegecv93I&feature=youtu.be
This seems to be a radio failsafe. Your radio is probably programmed to hold all values and set throttle to 0 which is what happened. Bummer about your crash!
Jason
Hi Tony,
sorry about your crash,had the same Problem with my Octo, just felt out of the sky.
Got DX8 as well,for me it was a range Problem.I´ve already sent it to HH.
What receiver do use ?If you can,try to program a dfferent failsafe mode.
Cheers Fred