I've tried and tried and tried tuning my alien
Running naze32 rev6 cleanflight
Blheli S 30a esc with multishot.

I could not get bounceback gone unless my D is set at 40.
Is this too high ? I just don't want anything to smoke .
It feels great though .

Short answer is:
If you think it flies good, and the motors are not too hot when landing, then D is good and not too high. It is no problem with mildly warm motors (you can hold them without feeling pain)

I've noticed that with my DYS XS30A running multishot I can bump my D gains up pretty high.

Same esc I have man

(15-Aug-2016, 06:20 PM)PoorMan FPV Wrote: Same esc I have man

what's your full set up bro? frame? motors? firmware?

Edit: sorry didn't notice that you mentioned cleanflight.

Just ordered rcx 2205 2350kv motors.
Alien 5" frame
Dys xs30a esc blheli s using multishot
Naze32 rev6
4s lumenier 1300 60c
Taranis d4r-II reciever

I just started redoing all my pids
Starting from scratch since I probably did rush it and jump numbers.
I'll keep this posted here for future.
Dropped I to 20
Dropped d to 10
Started p at 8 ..
Hovers nice at 6.1
Bumped I up just because .. it wasn't really moving at 20 but there was absolutely 0 wind and that's never normal. So at the moment it's pretty damn stable at
6.1,35,27
6.1,35,27
9.5,50,5

it's been a while since I've used cleanflight. but if you're quad feels good with the lower settings I would go with those. just if you decide to raise them back up be sure to check your ESCs and motors on landing. I like to tune using my HD camera cause I can hear my motors when watching the video again.

If you haven't already watched this video and the rest of them, I highly recommend watching the practical pid tuning videos from Joshua Bardwell: https://www.youtube.com/shared?ci=-QvJgQgtEZ0

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If you got bouncebacks at the end of a roll or pitch maneuver, you can probably raise d a little bit, but again, keep in mind your motor temperature. D is very sensitive to noise from the motors and gyro sensor noise, and turning up d too much on a noisy setup will maybe not be noticed on the flying characteristic, and it will sometimes even be better, but if you look at the Blackbox log, you can clearly see if the d is too high. If it is very noisy and the lines are much higher than the P and your motors are hot, then you probably have too much D.

You can think of the P and D as a spring and a damper. If your P is too low, the response will be soft, with large motion bouncebacks, while turning it up will stiffen up the motion Just like a stiffer spring you will get smaller, but more rapid bouncebacks. To prevent these bouncebacks, we introduce a damper D to the system. When you turn up D, you stiffen up the damper to dampen these bouncebacks that P was not able to get rid of. As you can see, P and D are highly dependent on each other, just like a spring and a damper on a car.

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If you really want to tune your quad to "perfection" I would recommend start using betaflight as soon as betaflight 3.0.0 is released. It is currently in release candidate mode now, but I read that they still find bugs in the code and doing some cleanups.

Betaflight 3.0.0 introduce promising notch filter which should be able to remove the motor noise picked up by the gyro and should result in the ability to run with higher P- and D-term so you would get an even more "locked in" feeling.
The new betaflight blackbox Explorer also introduces a spectrum analyser so you can see at which frequency your motor noise is appearing, and using the notch filter to remove this noise.

If you are interested, Joshua Bardwell again has some great videos on YouTube talking about many of these new features, and as soon as the final version of betaflight 3.0.0 is released, he said he will be releasing videos about all the new features

I'm getting rather frustrated.
I've been able to get my roll pretty much perfect but when I do flips I'm still getting bounceback and my D is around 37 on pitch.
If I take p down a bit on pitch could that possibly help?
Not to mention dodging rain for the last 3 days trying to do this has royally sucked.

when you're doing your flips are going full stick deflection? if so are you letting go of the stick and letting it bounce back to center? and also are flying with a GoPro? that extra weight in the front can throw off your CG causing the quad to try to correct it, so it will mean your pitch PIDs will be higher than your roll PIDs

No I don't let off of sticks
Yes I have a go pro on the front

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I don't know wtf happened yesterday . I was changing number and changing and changing ..
Was flying pretty good then all of a sudden just went sideways right into the pavement .
Only broke 1 motor which I'm ok with cause my new ones will be here tomorrow ..


Think I'll start over again after I install new motors ..
Sometimes this hobby gets you pissed off. Haha

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I might add though that my pids looked like this

I realize my I gains look high in my opinion but since this is my first real attempt at tuning I wasn't sure . It flew fine until the abrupt left dive
Roll 6.1, .073, 40
Pitch 6.0 .075, 44
Yaw 9.5, .050, 10

I know too much I will over correct . But this wasn't really over correcting any obvious times . I had turned several sharp hard turns flipped 2 times rolled 2 times
Then when coming out of a sharp turn it just dove down to the left into the street.

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Tpa 40. Tpa breakpoint 1500

I had the same problem with my QAV-R
SP Racing F3
DYS SE2205-2550kv Motors
DYS XS30A ESCs
it was flying fine for about 4 packs, felt really nice and locked in. then all of a sudden one of the motors would dip and it would roll straight into the ground. so I tried flying it again this time with my GoPro on and it would dip slightly, so after watching the video I noticed it was my number 4 motors, so I changed the ESC and motor and it was still doing it. so I checked it in BetaFlight to see if there was excessive vibration coming from my motors, I strapped my quad down and ran it with the props on and the traces hardly moved even at 75% throttle. so this led me to believe it was a desync issue. so I recalibrated my ESCs. went for a test flight and still did it. but long story short, I switched my looptimes from 4K/4K to 2K/2K and went from multishot to oneshot42 and it fixed it.

I changed my loop time to 1200 recently .. maybe I'll go back to 2000.. or 1500

I have a naze 32 rev 6 I thought 1200 would be fine

I changed over to betaflight
Haven't had a chance to test stock pids
Will in a few hours ..

you're going to like Betaflight.