Gentleman,
I hope I'm in the right section of this forum. Sorry if not!
In the video below, you see that my X8 coaxial octo runs up. There is no oscillation or instability, but just before lift off, one (random!) or more engines suddenly get very fast (diverge), hit the current limit of the ESC and stop. This happens if the octo is hanging from the ceiling (like in the video), or stationary on the ground.
https://www.youtube.com/watch?v=Lwr7lre ... e=youtu.be
[youtube]Lwr7lrelwLw&feature=youtu.be[/youtube]
What I've done:
-All ESC32 are calibrated with 13Amps and the Global limit is set to 15Amps. I tried 20 Amps, but that just causes a stronger tilt. I think the problem is not the CL calibration, the problem is why do they run up so fast at all?
-Trial and Error with the PID settings of the AQ6. I isolated every parameter and set to zero indepentently and it still happened
What I think it might be:
-ESC32 PID? So far I used default
-Interferece between AQ6 and ESC32 PWM signal caused by three-phase cable between ESC32 and motors
-I dont know, please help
Setup
Rosewhite X8 coax
AQ6 post Oct14
ESC32
4S 4400mAh
MN3510 630kV
13x4.4 CarbonProps (T-Motor)
Immersion RC LongRange UHF with Futaba 14Chnl
Thank you for your help!
Dominic