Greetings.
-using FC : Pixhawk cube orange
-Copter type and size : quad, reptile 550, 6S lipo 2600mah * 2
-Special note on this copter :
I installed tarot martin 4008 and 14 inch props which is too much overspec for this size of copter.
I overlapped props for acheiving this.
because I want to lift heavy things with small size on purpose.
-flight log file link :
https://drive.google.com/file/d/1nf1Ixp2tfOEFzIscAcxXKdqDDMMUsSQk/view?usp=share_link
-Question(1) :
I guess basic setup is already finished and one thing left is autotune.
so before I perform autotune, I want to know whether if it is safe to autotune this copter and use this to serve the mission.
I tried to decrease the vibration and magnetic interference of this copter.
because it is overspec, there was too much vibration. now vibration is okay but I found there is much magnetic interference.(although this copter flew well without no problem, but mission planner auto analysis says it has large magnetic interference, and sometimes the heading spins while landing until performing magnetic calibration)
it seems external compass is okay, only internal compass(which is same height with big motor) have problem. I can’t determine which compass has magnetic interference because I don’t have knowledge on mission planner logs. is it correct that only my internal compass have problem?
as I said above, copter seems to hover well and hold position well although mission planner log auto analysis says there are many magnetic interference.
-Question(2):
I want to know whether if I have to change “autotune_aggr” parameter since it have too much power than the frame size.
for your reference, to decrease the vibration, I mounted my pixhawk on the damper.
and, documentation says large copter(more than 13 inch props) should set Rate Roll and Pitch filters parameter to 10hz. I’m confusing because my quad size is not large but my quad has big 14 inch props. should I change filters to 10hz?
and my motor is 330kv which is under 500kv. documentation says this can generate sync problem. will it okay? and since my motor is overspec I don’t know about MOT_SPIN_MIN. will it be also problem…?
-for reference:
in the mission planner “initial parameter” tab, I entered prop size and battery cells informations. the copter flew very well with that initial parameter. it wasn’t sloppy and showed sharp movement appropriately. after that I changed parameters as mission planner messages.(ATC_THR_MIX_MAN to 0.5… etc)
-note:
I posted this to refer to other people’s opinions before autotune and to know if there is a fatal risk that can be avoid before flying. I know it is risky thing to fly overspecced copter. the responsibility lies with me. I will take precautions before flight.