I am having some problems with my large hexa copter that i recently changed the FC from AQ6 to an M4.
I am flying;
a 8.5kg hexacopter,
tiger motor U5 motors
tiger motor 40 amp pro esc's
M4 V2 with an adapter board from Joerg, very similar to the N4 (with extra connections to motor ports 1-4)
AQ FW; v7.0-EXPR rev 445 b1851 HW: v8.6 (One of Mennos Hott releases)
Only calibrated using "tare" and compass calibration.
here is my parameters file-
- pro 6 parameters M4.txt
- (15.27 KiB) Downloaded 1312 times
Generally the hexa flies fantastically. Return to home, postion hold ect all work perfectly. The accuracy in mission flights seems improved over the AQ6.
However i have a serious problem, in about 1 in 5 flights, with no warning i get a loss of control and she tries to fly away, always pitching forward. At this point all i can do is cut throttle.
From looking at the logs i can identify the same problem on 4 flights.
If you look at this log from one of my crashes;
You can see from the motor outputs, all looks OK until the last few seconds then the motor outputs go crazy. You can also see that i have no "stick" input.
Here you can see that vibrations are not the problem,
Here is the crash from the camera on the gimbal
[vimeo]https://vimeo.com/163112560[/vimeo]
You can see that i finish my rotation and the craft has just about stopped, when suddenly....she tries to fly off!
I have made a folder with the logs from all four of these incidents. They are available here;
https://www.dropbox.com/sh/z23bjgaxiwry ... AEFza?dl=0
In all four incidents you can see the same problem in the motor outputs. All seems normal then go's crazy. The really worrying part is that this has happened in manual as well as position hold.
In all the flights where i have this problem, the logs are the same. I can clearly see that there is a problem from looking at the motor outputs. However i am at a loss to the cause of this. I had originally suspected it to be an issue with compass calibration, but multiple re- calibrations have not solved the issue.
This problem is really sending me crazy. I am suppose to be working all this week, but until i can understand and fix this problem I have had to tell my clients that i am "grounded", which is a disaster as we are shooting a ski film and there is only 2 weeks left of the season!
I do not understand why i can get multiple perfect flights, and then suddenly a problem.
I hope that to someone with a deeper understanding of autoquad that the answer to my problem is in the logs. But where do i look and what do the graphs mean?
Any help would be very much appriciated! If there is some one out there that i can pay to do a few hours analysing my logs and offer solutions, i have no problem paying for some one's time!
In the meantime, I am going to switch my flight control to a new M4-N4 from flyduino, and update the firmware to one of max's new builds and cross my fingers that the problem goes away.
Thanks for listning......
Tristan