Hello everyone,
I was flying a quadcopter for 2 hours on bright sunny day. In one of the flight were it was supposed to do a semicircle of 500 meters radius at 100 meters height, it crashed after crossing roughly half path. I can see that the desired roll vs roll and desired pitch vs pitch graphs going apart few seconds before the drone lost altitude. Apart from that I am not able to find out much. I want to find out the cause of the crash, is it any part failure or something else. Can someone help me with this please?
Also in webtool of Hardware report, I see that there is clock drift of 400ms getting developed gradually. Can anyone please explain what is it? Is it concerning?
Not sure but there appears to have been a problem causing intermittent loss of thrust on Motor 3 and then it lost all thrust and Motor 4 dropped to Min and down it went.
Are you using am32 or blheli32? Either way, you need to adjust the motor timing. If you want to reproduce the problem, slowly increase the throttle to 90% percent and listen if you are getting a lot of stutter in the motor. I don’t like these dropouts.Your rpm data should be a clean line, but there is a lot of dropout. Most likely, you are getting desync. But this can be solved easily if you adjust your parameters in blheli 32 or am32 configurator. make sure the telemetry lines are clean and no noise is introduced.
@Farkhod_Khikmatov I am using blheli32. Which parameters are important for motor desync. Is it motor timing. It is currently 16 deg. I should try different values? Instead of using motor stutter sound can I try different values of motor timing until I get clean rpm data?
Any range of this parameter you can suggest?
You can try auto-timing first. If that does not work, try slowly increasing the motor timing and increasing the demag a little. Honestly, I had the same issues as you. It might just be a bad esc and motor combo, but I might be wrong. Just try experimenting with different values. Different settings might fix the issue.
@Farkhod_Khikmatov I was thinking that how is it physically possible for rpm of motor to go from 10k to 0 and again come back to 10k in fraction of seconds. Is there a possibility that this might be a logging issue?
Is there anyway to confirm whether this is ESC desync?
