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- APM 2.8 / devo 7E hex - flipping forwards on power
APM 2.8 / devo 7E hex - flipping forwards on power
- tboneportly
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I've seen a few threads on this but no obvious solutions (apart from put the firmware back to 3.2.1, or the board is stuffed)
I'm running an APM 2.8 board with v3.2.1 firmware
Devo 7E tx - running deviation
Devo RX701 rx
F550 hex - using hexa X motor layout as per this - ardupilot.org/copter/docs/connect-escs-a...ght=connect%20motors
as soon as I power up enough to lift the hex flips forward - I've checked my motors rotate correctly, and the props are correct as they have lift, and the hex is responding to the tx as I expect (just before the flip)
any clues?
cheers!
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- HappyHarry
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- tboneportly
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I haven't set up anything complicated on the tx - just the FMOD switch, and both options on that are set to stabilise
I'll have a look at the channel output screen and see if that makes any sort of sense to me... steep learning curve
![:D :D](/media/kunena/emoticons/laughing.png)
I am thinking that the probably the flight controller is bad - didn't do enough research on that one ...
![:( :(](/media/kunena/emoticons/sad.png)
cheers!
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- aMax
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Devo7e, TaranisQ X7, R9M , 4in1 MM, Futaba FC18plusV3.2 & DFT/FLD-02
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- tboneportly
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- tboneportly
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cheers!
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- aMax
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tboneportly wrote: just looked, subtrim for ELE AIL THR RUD are all 0.0 - is this correct?
cheers!
That are your trims and I assume the output value will be around 1520 on the missionplaner and not 1500.
ardupilot.org/copter/docs/common-radio-control-calibration.html
....use subtrim to correct this.
Edit:
If the cannel range is not between 1000 and 2000, you will have to increase it with a different scale.,e.g -120 and +120...or even more.
Devo7e, TaranisQ X7, R9M , 4in1 MM, Futaba FC18plusV3.2 & DFT/FLD-02
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- tboneportly
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with sticks centered - left - right
Roll: 1500 - 1105 - 1900
Yaw: 1500 - 1101 - 1901
pitch: 1500 - 1101 - 1900
so that looks right....
I change the motor config to Hexa + to see whether it made any difference, now it flips backwards!
I think, unless there is something wrong with my calibration somewhere it must be the board?
cheers for the help!
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- Cereal_Killer
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Taranis X9E | DEVO 10 | Devo U7E | Taranis Q7
What I do in real life: rivergoequestrian.com/
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- magic_marty
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- tboneportly
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there is definately a rogue setting as I can just about keep the hex level with full forward pitch, but not get it in the air as as soon as the throttle goes up enough it flips, I've checked the motor rotation and props repeatedly, so unless the diagrams on arducopter are wrong it shouldn't be that!
attached the diagram of the motor layout
is there some way of calibrating the gyros using the tx (as my MJX 600 could do that) or is it only done in mission planner?
thanks for all the help!
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- M8A4X
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- M8A4X
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Please check the following:
- each ESC is connected to it´s correct port at the APM <-- check with diagrams in mission planner for correct motor/ESC number
- each Motors spins in it´s correct direction
- each propeller is mounted to the correct motor (produce lift when turned in motor spin direction)
I once had my ESC´s hooked up incorrect to the flightcontroler... resulted in a flip after takeoff.
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- tboneportly
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I've tried Hexa X configuration (flips forward) and Hexa + (flips backwards), can't even get it in the air!
cheers
Terry
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- M8A4X
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- M8A4X
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How about teaching the APM (or more directly the ESC´s) the throttle min / max stick positions?
Here is a link to a corresponding youtube vid: ESC Calibration "All-at-once" method
Before doing this, please take the propellers off!
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- tboneportly
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now I get the bad gyro health message when I plug the GPS module in, but that can wait - I'll give it a try outside again, see what happens and report back!
is there any where is mission planner where I can see the motor speeds?
cheers!
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- M8A4X
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- M8A4X
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It seems to be a hardware fault on the APM board.
It is strange that this error occurs to you only when you plug in the external GPS.
Without it there is no bad gyro message? If so, maybe your GPS module causes the problem?
Flying with a bad gyro is a bad idea as the APM would never know when it is level.
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- tboneportly
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![:) :)](/media/kunena/emoticons/smile.png)
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- magic_marty
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- tboneportly
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I reset the board using mission planner, recalibrated everything, recalibrated the gyros using the all at once method, and hooked up the gps / compass
no idea why it worked this time, but it did, and I managed a full battery worth of flight - bit unstable and drifting slightly, but that's fixable
now for setting up flight modes, the telemetry and camera... expect more stupid questions!
thank you all for the help and advice
cheers!
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