I have jrdrones ArduCopter Quad with ArduMega1280, 20A ESC, 880kv motors, sonar. Using the 2.1.0 Alpha software.
I have just got it flying for the last month or so, and have flown it a few times with increasing success, total time about 30 minutes.
A few days ago, was flying in STABALIZE mode and was able to move around pretty good for 5 minutes or so.
I then switched to ALTITUDE_HOLD, and it worked well (+/- 1 meter) for a minute. Then the left engine (in plus configuration), dipped a few times, and as I was trying to land, quit completely and flipped it over. I am trying to diagnose it, and would like some direction. The battery was still full when I checked it. I don't have logs because it is a 1280.
Does this sound like :
I haven't tried the engine yet on the bench, but wanted to see what the most likely cause was
This is usually caused by vibration affecting the bullet connectors.
Either vibration or faulty motor.
Come to think of it I had a very similar problem. Fortunately i wasnt in the air when it presented itself.
Heres a video of what the motor was doing
As you can see, it was a dry solder joint between the motor connections and the extension wires.
It came like this from the factory.
Should I solder the connectors instead of using the bullet connectors?
I use bullet connectors and they work fine. Just make sure you solder them! Dont play with them, SOLDER the biatches!
Logic is the best problem solver. If the motor doesnt work, plug it into another esc. If the motor still doesnt work, its the motor. If the motor works, then its the esc/pdb/bat etc. Plug another motor into the ?able esc, it it works its not the esc....
Wash rinse repeat :)
Thanks for you help, I'm new to all this soldering stuff.
So when you say to solder them to the wires from the motor, do you cut off the banana connector on the motor or leave the banana connector on and solder that to the bullet connector?
Im not sure about your setup, but mine is as follows:
Soldered onto the wires coming out of my motor are extension wires that run all the way down the aluminium boom and come out of the hole on the side of the boom under the "dome".
Onto those wires are soldered male bullet connectors.
Onto my esc are soldered female bullet connectors.
They are plugged in and heat shrunk.
Is this how yours is setup?
Yes, that's how mine are setup now.
I personally would just take out the motor and try it by itself... With that, you will know the answer pretty much... Meaning, if the motor doesn't work by itself then that is the problem... If the motor does work, then you have more to troubleshoot but more than likely if that were the case, it wouldn't be the PCB... or the Power supply or battery... more than likely most common errors, are due to the wires, or clips on the wires (some do this like with car radios), the solder not fully connecting the components (cold solder joint) or the ESC...
This isn't a vibration thing, all vibrations can do is loosen connections or break them... Vibrations can affect the sin-waves but only with noise, and noise won't make your motor stop working...
Get rid of the connectors and hard solder the motor to ESC connections together.
This has fixed both my AC and a brushless buggy the kids got for xmas.
It will take you 30-45 mins for an AC, but it was serious peace of mind for me.