Every time when I was doing Autotune for a few minutes the drone suddenly fell and crush onto the ground. I attached the four logs below and only the first log captured the status when crushing, the rest of the logs stopped suddenly and didn’t capture the movement of crushing.
I have a few assumptions for the causes of crushing:
The 18650 battery. Since it’s the first time using 18650 VTC6 battery, I’m not sure whether my drone’s voltage or current exceed the limit. However according to its data sheet, the battery voltage when crushing (3.3v) is greater than its minimum voltage (2.8v), and the actual current (9.5A) is less than the limit (30A).
The short circuit of the camera connected to the flight controller. Since it has been short circuited once when I was soldering the power cable on to the camera. When I powered on the drone a smoke raise from the FC. Later I fixed problem by resoldering the cable and isolated the soldering point with glue. The drone can fly quite well. However,I never performed a flight longer than a few minutes.
The FC, ESC, or Motor overheated. I don’t know how to set up temperature monitor. If anyone know how to do please instruct me.
Motor issue
Could anyone analysis my logs please. If anyone can come up with any other reasons for crushing please leave the comments below. Thank you guys.
No logs. Attach a link to wherever you store them in a cloud service, you can’t directly attach them. If there is more than one log explain what they are.
Ohhhh I see. Since I’m using 18560 battery which has the minimum voltage (2.6v) lower than Lipo voltage (3.3v), and my FC Kakute H7 mini has a minimum voltage of 2S, perhaps the problem is the minimum working voltage of my FC is 6.6v (2x3.3v) which is higher than the battery. Do you think the reason could possibly be this?
I increased the Flight Controller power voltage to 12V and changed the motor to 1-3s motors, but the problem still exists. The drone still falls to the ground went voltage falls below 6.5V. Below is the Log.
I think this might due to the problem of my ESC, but the manufacturer told me that this ESC can still working till 3.5V. Has anyone tested the HAKRC 4in1 40A ESC?
Or can anyone come up with any other reason for the crash?