Quad is Flippin on Take off, help/Advice required Please. :)

[Sebbie]

I have setup the gyros, calibrated the Esc's set the uinit up ready to fly.
The motors are as per the channels and rotate as required, its driving me mad.
But as I raise the throttle to increase power, she gets to almost take off speed and flippin flips.

Every time, it happens i think im nearer to take off and she just flipps again.
I am after advice what to check/change/swap, there is no unusual noises, I can hear.

Do i need to check the PID tuning, or is it something less complicated and simple like me.
Your help is most appreciated, im so close but so far.

Sebbie

 

[Droider]

Cant see it properly but are you sure you have the motors assigned correctly.. I could send you my config file if you want it..

Dave

 

[matwelli]

first thing is to check the mix setting on the airframe tab, should be 50% for R/P/Y , theres a bug that sets this to 0

 

[ovdt]

I had exactly the same problem. Problem source was with the flight modes. On my Spektrum DX8, when the poti that controls the flight mode is at position 0, it was selecting Manual Flight Mode. I reversed the channel in GCS so the problem is gone.

You should always fly with stabilized modes.

Here is the topic I started:

http://forums.openpilot.org/topic/5862-different-escs-on-coptercontrol/

 

[Sebbie]

Cant see it properly but are you sure you have the motors assigned correctly.. I could send you my config file if you want it..

Dave

Dave that would be most appreciated,if you could.
email is "DELETED TO STOP CRAWLERS"( got it dave)

Here is a text doc of my settings for reference

http://sebbies.co.cc/sebbie CC UAV Settings.rtf

Maybe itll help shed some light on the subject.

Sebbie

 

[Sebbie]

first thing is to check the mix setting on the airframe tab, should be 50% for R/P/Y , theres a bug that sets this to 0

Mat,
I have checked and changed them to 50% for R/P/Y they where set at 0, has this bug been reported ?
Thanks for the heads up,I'll try her again *fingers crossed*

Sebbie

 

[matwelli]

ohh yea, its a well known bug, its the first thing i sugest when someone has trouble

 

[Sebbie]

Well i have saved all the chnages i need, but rain has stopped play here, so ill update you all sooner than later i hope
British weather you cant beat it hehe

Sebbie

 

[Sebbie]

Hmm it seems to be more responsive and doesn't flip as much, so i guess im getting warmer.
Il leave it tonight, its late and i will look again tomorrow with fresher eyes

 

[Droider]

Hi Sebbie.. I just rebuilt mine coz I was not happy with the way I threw it together.. I have got some different motors and tidied the wiring up but apart from that I just fired her up in the garage and its as stable as out.. with the settings I sent you

Dave

 

[Sebbie]

Droider,
I dont flip as much, and she does fly off, just not hover. I have tried Stabilized 1 mode (att/att/rate settings) and Positionhold.
It may be down to my Joystick control, but she wont go straight up and just hover.
Ill be home earlier today so i can have more time with her, ill try do another video as well.

John

 

[Droider]

she wont go straight up and just hover.

You mean she drifts off?

 

[Sebbie]

Yes she drifts off now, im just going to test your settings on her, ill brb.

 

[Droider]

They dont have any kind of position hold so they will drift off. I just stop it by trimming with the trim tabs.. but it will still drift off in the wind. Did you calibrate your TX sticks ok?

Dave

 

[Sebbie]

Yes i did, maybe its just me then
I am going to swap out motor 2, it seems to always drop that side.
Hopefully itll be better then.


Sebbie

 

[ovdt]

No it's not only you.

I didn't tweak my CC settings but, it drifts to certain direction even I trim the TX. CC needs some tweaking for sure.

And you can find the guide here:

http://wiki.openpilot.org/display/Doc/Stabilization+Tuning++Multirotor