Hello everyone, I have built my drone but it is too unstable to takeoff, like it instantly goes on the side and crashes. I don’t know what the problem could be, but the weight distribution seems fine. I have made 2 videos, where you can see an overview of the drone and the spin of each motor and another one where you can see what happens when I try to takeoff. I didn’t do the Methodic Configurator yet, because from what I understood this configurator is to correct some small issues, or things like that. And my question is is my problem something much bigger then that, then what the methodic configurator could do for example a hardware problem or no? I use quite old hardware on my drone, but I have arducopter 4.5.1 flashed on my pixhawk. Any kind of help will be much appreciated, thank you very much.
Here are the links to the videos, I was forced to upload them to youtube due to the file size:
takeoff test
drone overview
That is incorrect. It is to fully setup the vehicle from ground up on the first attempt. Avoiding crashes and trial-and-error approaches. But yes, it can also correct small issues.
No.
Anyway, statistically the problem is that the motor order and/or direction are incorrect.
What are the components on that craft, it’s battery power and take-off weight? Less video, post a link to a log file.
yeah but it seems correct. I checked the docs and it looks like my motor order and direction are correct. In the second video I showed the motor direction and order of my drone.
It weighs about 1.3 kg
14.8v battery and 1000kv motors
blheli 32 ESCs
Prop size and pitch? And what motor at 1000kv
It has 1045 propellers.and the motors are racestar BR2212
You should have built for 4S battery power but if that weight is accurate it should lift off. But the thrust/weight is too low. Post a link to a .bin log file of a take-off attempt.
But I can not takeoff because the drone goes to the side instantly as I try to lift off. You can see it very well in the video I linked.
So what. If it arms a log is created.
ok, I will post a log as soon as I can.
If it goes to one side before taking off:
Check prop rotation and frame selection.
Did you do ESC Calibration? I had similar problem, and it was due to one motor running much slower for a given PWM signal. It also happened after I have burnt up a motor…
You can test if ESCs and motors are OK by using the Motor Test, tie down a weight (or hold the copter in hand, very dangerous), and increase slowly the throttle setting in the motor test to see if the overall pull is more or less vertical when it reaches hovering power.
If that is OK, the only things remaining are:
Is your stick centered and corresponds to the center position, and if there is a discrepancy with the central position. If you did radio calibration, that should be fine, but you should recheck. A quick test for this is to increase slowly power and push the stick in teh opposite direction. If it is stick calibration issue, you will be able to level off the copter, if not the problem is in the incorrect setup, probablt rotation or bad motor…
Finally, if the board orientation is wrong, you would also get a similar response (and also if you did not do calibation of the IMU).
I have Blheli ESCs and set the max and min pwm to 0 in the esc calibration section of MissionPlanner. I selected the correct frame type. THough for the motors, now that you mention it they might be the cause of my problem. When I do the motor test, at 5% (the default) they just don’t really run, they stutter. When I go up, they then start running, but they don’t all make the same noise. I posted the link to a video where I do the motor test, could you maybe check it out and listen to the noise of each motor so I know if this is the issue? Because I don’t really know if it’s normal or not. You can also see the motor spin direction in this video, but I am 80% sure that this one is correct. Thank you for help so far.
You have to do a procedure of ESC calibration in the Setup Menu of Mission Planner, it is not the same as setting PWM to the same value. The fact that some motors do not run exactly the same way a ta given throittle setting is just indication of the same problem.
Do I, because I have blheli 32 ESCs. So from what I understood I don’t need it. Also, I have already like tried but nothing was really happening. Like the lights on my FC were flashing like when something is being configured, but nothing more.
That’s right, you don’t if you have configured Dshot or Bdshot properly.
It is a 4S battery. I confirmed prop and motor direction, and selection of frame type.
The log thing is kinda bugged I think, because it is written that it is from 2021, but it is the one on the very top of the list. Here is the link: 2021-03-27 17-13-34.bin - Google Drive
Oh, and I am sorry that it took me so much time but it was raining really a lot where I’m at lately.
The log is not bugged but you had no valid GPS-time at that time
You didn’t find anything helpful in the logs?
Not worth troubleshooting a V4.0.7 of firmware that is 4yrs old. Update to latest Stable and start over.