Hi all, I'd like some insight as to why my quad wobbles when increasing altitude/throttle. I have lowered the PIDs in stabilize mode (now as low as 3.2 for Roll and Pitch) which helped but I 'm still getting some wobble when increasing thrust apparently. I have attached the flashlog (I think I'm getting too much vibrations on accZ too) and a pic of the drone. I have the APM on a rubber stabilizer which I hope is not the issue (I have not tried removing it and attaching the APM to the F450 directly with some silicon rubber biadhesive). Any feedback is appreciated!
Thanks!
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Dear Luca,
Just checking, where is your Basic Roll/Pitc Tune at? I had a wobble issue a few weeks back on both my quads, and looking through my own settings, I actually ended up increasing the PIDs instead of decreasing it. The wobbles get worse and worse until they start dying out again, and then start twitching. I then turned down to get rid of the twitches. You may want to try that. Also, I'm not mounting my controller on any vibration dampening, but then again, I fly Pixhawk on my "smart" drone and my "dumb" quad is a KK2.
Hope you can get that bird level!
Best Regards,
Khoa
Also, if you can get a closeup of the ESC, I may know what's up with them, I've bought tons of no-name ESCs, I can probably recognize whether you got a bad batch or not.
Hi Khoa,
my Pitch/Roll PIDS are now 4.2 in stabilize - I haven't tried in loiter yet. The sporadic wobble is apparently not much affected by increasing or decreasing these PIDs. I increased them from 3.2 as it had become a bit sluggish - 4.2 seems better. I went to my airfield yesterday for a few autopilot "journeys" and all went well, the wobble is practically inexistant. It actually is more evident just after a full battery recharge. You can see it slightly wobble here after I take off and hover just before switching to autopilot:
https://www.youtube.com/watch?v=OWE3ixQFHCI
I'll mount my self built gimbal on it (BruGi project) and see if it can handle the 450 added grams. I'm getting around 12 minutes flying time with a 3S 5200mAh Multistar pack with which I am very satisfied with (handles 30Amps well, low internal resistance). Will switch to a similar 4S soon. As you can see I am using an "old" JR radio (35MHz) as I fly the copter in mode 2 and didn't have a mode 2 TX available so I modded my old JR which can be programmed in Mode 1 or 2 via hidden menu. It's old but works damn well with the double conversion RX SMC19:) - never had a glitch in 15 years of service!
The ESCs have the heatshrink on so you can't really make much out of them. I will probably replace one (the one connected to the front left motor which heats up the most) and give that a go sooner or later.
In the mean time thanks for the help!
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