I finally thought I had my copter all tuned up and working well, but today I had a wreck that cost me a motor mount and prop. I engaged RTL a few feet off the ground and the copter immediately pitched hard into the wind, overshooting apparently, then pitched back violently the other way. The first time, I was able to recover in stabilize mode, but the second time the rocking was so violent it continued to overshoot all the way to the ground.
What do I change to make the copter not overshoot in autopilot modes? I don't use the copter in actual auto mode, but when I did try one time it seemed to do the same thing (in heavy wind only). Please help if you have any ideas. Would it help if I turned on the braking feature of my ESC's?
I'm really hoping to get this resolved tonight as I have videos to shoot the next two days. Unfortunately, I had no extra CF props and now am forced to use one plastic one. If logs are needed, please let me know and I'll post them.
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I think I've found the source of the problem, or possibly sources. My board mount has some slop in it which was obviously causing overcorrection. I plan to use this information found in a post from Leonard Hall to attempt to fix the problem.
With ATC_RATE_RP_MAX set to 9000 centidegrees/s, the problem seems to have subsided. I also havled the ATC_ACCEL_RP_MAX to half of the default value. The copter seems to move around a little in the wind, but it RTL's properly now with no crashing.
What version of the code are you using?
Chris, I'm sure you're a busy guy but I really could use some help here. This problem surfaced again while in stabilize mode and I'm at a loss. Wrecked my videography copter two times over the last two days and now my gimbal is broken and I can't film tomorrow like I was scheduled to. Today I was flying on the beta firmware 3.2 rc2 and had adjusted the parameters as mentioned below. The first battery went fine with no problems at all and then about 1 minute into my second flight, the oscillations of death started as I descended at a normal rate. I'm very discouraged by my failings with Arducopter and think it may just be too complex for me. If I can't get my copter to fly reliably with an APM, I'll be forced to get a different flight controller, maybe even a NAZA :(
Please tell me what you think is going on here, I'm desperate.
It's the latest version, I just updated it a few days ago. This has been an ongoing problem with the hex. It is quite overpowered, which may contribute. Let me know if logs are needed.
EDIT: It's the latest stable version BTW, not beta.