How to: Fix Oscillations | I-term Tuning 

1. we start with i=85/90 and P=5 --> it freaks out 2. we lower i=40; with P=5 remaining --> it flies but wobble city 3. we raise P=30 with i=40 --> wobbles are gone 4. finally, we have he full tune with i-terms back up at 85/90, higher P-terms for even better performance, and raised D-gain now to control the oscillation of the higher P-gains. Note: P and D together need to be as high as they can be for the best prop wash performance.

I keep coming back to this video every time I try to tune by feel. I think this is the single greatest video for explaining what's happening to a quad that's out of tune and what it will do and what to do to fix it.

That’s a great way of thinking about it. It’s very common for people to see any oscillation and immediately go to D. This should clarify what’s really needed. Would be nice to have a graphic here of the error and oscillation difference for I vs P. I oscillation is usually

You can remember this as “I need to P” 😂

I really appreciate your videos. I’ve watch almost all tuning, and black box videos at least a dozen times and am slowly grasping it all. Thanks to you, I’ve been recognized on multiple occasions as a top tuner😁 Thank you again, I look forward to more tuning and black box tips as firmware updates continue to release. 🙏 BlippyFPV

Completely reconceptualized tuning for me. Thank you

I really like your explanation, a new way to think of it... I tended not to think of I-term as a source of oscillation but I totally see it in your example.

Great video with examples that made it so clear. I also appreciated you reverse orientation when spelling out PID. l can’t wait to watch more.

wow, i think one of the best PID explanation videos 👍🏻

Great explanation, a very simple way to remember and apply for best tuning, thanks for sharing

That was extremely helpful just like the rest of your content, great job!

great video, frame swapped a cetus pro and had problems, your video helped me tune them right out, thanks for sharing

This tutorial saved me! I had terrible wobble on my Betafpv 95x v3. New FC, props didn't help until I have changed the pids. Thanks UAV Tech!

I’m not even 3 minutes into your video & I already know I’m going to watch it like 10 times. I get a better understanding that way 👍👍👍👍👍👍👌Great idea setting the quad PID’s off like that. We can actually see what the PI& D are doing!!!!!! 👌👌👌👌👌👌😋😋👌

Thanks for all you do for the FPV community!!

Good tuning tips Mark, thanks a lot!

Great stuff. Very educational. Thanks for sharing.

Thank you, excellent info.

Bro that 7 inch preset worked perfect. Thank you so much

You explain this the best thanks for doing these vids!

Great explanation! Thanks very much for this! 🙂

Pretty interesting, Mark! Thanks a lot! 😃 Stay safe there with your family! 🖖😊

Very instructional! Thanks!

Hell yeah im just starting to try tuning and this helped me out so much thank you dude

now that's much easier to grasp , great stuff dude

When I first got into this hobby it was PIDs. I like your explanation better. I will try this. IPD.

Big thanks! Subscribed 😉

Love this explanation.

Love this! Please do more videos like this!

This is definitely more critical on 3" super light quads. I just spent a couple hours tuning. Betaflight 4.2.4 pids where way too much for my 6s 3". Another excellent informative video. Thanks Mark!

As usual best explanation ever :)

Thanks for this video. Made tuning so much easier and faster. All quads locked in now! LOL

Your content ist master class. Video by video.

This was great! thanks a lot man

Really usefull video thanks for sharing this ! Also subbed 😉

brilliant video thanks

Big thank you 👍🏻 iPD

Great work!

Makes me want to tune my rtf quad lol....I have alot of propwash that I want to get rid of this was very informative 👌 ✌

Thank you for linking this video for me in the Ciotti stream. Going to give this a try tomorrow, let you know how it goes.

Hi just what I needed but need to repair my FC first. Need to resolder my battery cables 🤦🏻‍♂️ When I’m ready, I’ll study this. Take care & happy fly’n 🤓😉😘

Thank you.

Nice one! I use to tune the I alone by checking the quads reaction when going straight and punching the throttle. If a have a nose up in the punch i add I in pitch, if i have some angle taken in the roll axis i raise the I in roll. Usually this ends up in relatively high I values of about 80-90 ( the time that my P and D is arround 35-50). Should i try lowering at steps the I and see what happens?

I should try this.. thankss

big help as usual....also like the outro music

Interesting.. definetly I'll try this concept of tuning.. :)

Thank you!

Really great video ,the first flight reminded me of my first quad(it flew like a cow!) and teaching myself how to tune.😃 Betaflight defaults are so good now I really struggle to notice that much of a difference in adjustments. I tend to get to a point were it's ok for me and fly it ,probably just compensate without realising?

I just tried your preset on my 5" and I am blown away bro. I thought I was pretty good at tuning. I live the cli commands. Only thing I did different was my stick response slider. Yours is way up their. Lol 😂 thank you so much bro I'm going to buy you a beer right now

Thank you very much and as always a very clear explanation. Would be nice to see how to tune for I-term

Excellent video, helped me tune my wobbles so much it cannot fly quad into a smooth machine in only three battery packs.

Transtec laser HD :-) Love Transtec Laser frames! Great quality carbon, not really T700, but still amazing! (be aware - motor mounts are too week, use 4 screws there if you want to bush it). Only issue is props in view. Surprised how well it flue with D term 5!!

I love the explanation at the beginning with the letters. Like Sesame Street for drone people.

Nice vid... thx you got new sub

What would the FPV world be like with out you?! Cheers Mark! You keep us all in the air.

I'm a plane guy but this was very interesting for me too! I wish you would work as a INAV Dev and fix their autotune :) keep it up!

Thank you so much for this one. disclaimer: I am new to building drones. Also, I don't think I understand PID controller all that well. I've been struggling to get my Quad to fly. Been through a lot of documents and videos. My drone would wobble so much that I couldn't really make it fly/hover. This video has been a turning point for me, where I am now able to fly the drone vs not at all! So happy that I am now able to fly the drone.

Hello. I recently bought a Crux35 v2 crazyf411 20a aio elrs uart and od mid high throttle manouvers it has this inefficent brrrr oscillations. That one hasnt got a blackbox. Im a beginner. What can I do?

thanx

i need help on tuning my 2s 4" quad. it is little bit overweight but flies stable. when i try to record the flight, i continuously experience wobble on pitch axis. it acts like it is driving on a bumpy road. what ever i do, even changing controller, wobble is always there. since camera has no EIS, it reflects all small amplitutde slow oscillations on video clips. i adjusted, pids with patience with hours of trying, , i adjusted filters, blackbox is almost vibration free, fc is on soft mounts etc. i am using old PWM esc board from aeesparrow square drone. This dron is actually a wifi drone but i converted it to fly with my own transmitter and a proper f4 controller. its original version was almost vibration free indoors ( with its primitive controller). what could be the reason?

Thank you! I have always wondered, why is there no slider for the I term only? Also, where did you get the go pro mount for your frame?

Great explanation thanks, I’ve got low throttle oscillations, on a 3” what advice for adjusting pids to help with that? Tbanks

That's a sub. Thx.

Hi...thank you for this Newb question...how do you know where to start? If I build a quad and the FC has the latest firmware does that flash include a 'stock' PID tuning to work from? If not, what values would I enter to start the tune from?

Hello. I just built my first dji tinywhoop. I just want to ask why it wobbles when i fly close to the ground like 3-5nches distance? Can the PID fix it or is it ground effect? Thank you.

This is the video I needed lol

holy f*ck thankyou so much, i could never understand this stuff and you just made it so easy for me and saved me breaking my quad

does a perfect tuning with the black box increase or decrease the flight time? I noticed that by increasing the PID a lot I have a greater absorption from the battery and the drone tends to have much less strength and is woody. Probably wrong tuning and bad tracking of setpoint increase corrections and reduce battery in short time?. Probably wrong tuning and bad tracking of setpoint increase corrections and consume battery in short time?

Doesn't that mean the the whole methodology of going for PD-Balance first and then introducing I-term is flawed from the get go? I did a tune where I started from 250 Iterm, as i really like the locked in feel, and ended up with a much much lower D-gain than usually yet feels very much on point. How would you about the tuning steps given this insight?

So I have had a really bad oscillation problem on my new 10" drone, I have tried adjusting the I term and P term and no matter what combination of numbers I do it still slowly oscillates and gets worse until I end up crashing it, any ideas what could cause it?

Wow! Thank you for sharing. Learn new ideas to tune kwads.

What would cause P, and I fast ossilations on yaw? I'm dealing with this on one quad, and I just cannot seam to get it to go away, no matter what I do with p(45)and i(80) ff120, since there is no D on yaw.

So for each quad size, can it have same I gain value.. Or bigger/smaller quad will have lower/higer I value? Based on what? Power to weight ratio or just the AUW of the quad..

nice approach i am gonna test it out, will it work as well even on emuflight?

Do you have any advice on how a 9” quad I.P.Ds should change compare to a 5”? What would you expect, and I will lower my rates too. But they aren’t that high, 600 ish

I was getting some wobbles everytime I throttle up passed 50%, I drive myself nuts trying to fix it on BF, gave up, tried EMU flight and it's now gone, but what would cause that sort of wobble during a quick punch out?

ive seen it stated that P and D are for "high"-frequency errors and I is for low. I have been able to eliminate wiggles in my large 55 lb drone by merely adjusting I term. tradeoff seems to be steady state error (pitch in my case) vs wiggles, but this error is still acceptable. of course what makes frequencies "high" or "low" is dependent on your setup...

Do you have suggestions for videos to start with? I get tripped up since beta flight keeps changing. It’s hard to tell what’s relevant to learn, and what isn’t. I hope that makes sense. TY.

Would you do a tuning video for a 12s Xclass rig spinning 13" props? (filters, PIDs, etc).

hey i crashed my drone into a tree and it was left there in the rain for about 6 days, i replaced everything except for the FC and ive been getting extremly hot motors at hover ever since i rescured it; i didnt touch the pids or filters before the crash and my motors never got hot. is there a high chance that my gryo is just damaged? the drone is mechanically fine.

Thanks for the info of this, still learning. So if Im on the right track, I have micro jitters, and to solve this, I would increase the D term? Tricky stuff for beginners.

Is this order of thinking only appropriate to certain system responses or general in nature?

6:29 HOLYY!!! I want that!! T_T

What about yaw? My quad wobbles all over the place when i give it full yaw. Can I use the same technique used for roll and pitch?

what if you turn off the pid (ipd) controller? that's how quads and tricopters started, with mixing in the tx but i haven't seen it done with modern precise esc's motors and reliable recievers

Watching ur videos all over. I got a drone (lightweight 5" long range low power) I went to iNAV and not wont fly on 6S. at first couldnt even hover bad fast oscillation. Lowered everything to default and not my BF tune i put into iNAV. I upped gyro filtering too. I have no vibrations it looks like. But at higher throttle going up it oscillates bad. Fast oscillations like it feels like it wants to run away. been slowly raising D term now. BF PIDS were like P58 I87 D42 INAV started at BF then went to Default P40 I30 D23. Increased D to 30. it helped a lil. Now increased to 40. see if it helps. Hoping I can get this flying good in iNAV want to use it for long range in TN. Roadtrip from NY to Tn just to fly this drone long range lol. It did fly fine in beginning on 4S. Havent tried again Wish you lived near by. Pay you to fix it lol actually reading description ur only hour and a half from me. Im in Wappingers falls NY

Great tutorial! Many thanks! 👍🏻👍🏻👍🏻 Is there a video about "I-Term rotation"?

with bigger quads, 8" and above. should I start at I=40? or just go higher?

Can i get a bit rid of propwash at my quad its a betafpv v3.. I feel it has really a lot of..

Finaly !!!

why is the I term and P term different for roll, pitch and yaw specifically? Cant we just set yaw the same as we set the other two? like 40 instead of 90?

Hello, I am new to your channel as recommended by Joshua bardwell amongst other flyers.. I have built several quads since I started fpv back in august of this year and so far, everything but two seem to fly pretty good, but I know there’s room for improvement.. I haven’t been too worried about since I’m still learning to fly better, however, my repertoire of quads is growing and none of them have more than a stock tune.. like I mentioned before, two of my quads, actually 3, have some tuning issues that need to be worked out and I would also like to learn to tune the others beyond a stock tune.. I see that you seem to have a plethora of tuning videos, and so does bardwell, but here in lies the problem, I’m very new to the tuning aspect as in I haven’t done it yet, and every video I’ve seen so far is of much older versions of betaflight than the current that I have been using.. this only compiles the the confusion because I cannot see on my screen, what is being shown on yours or anyone else’s screens.. as a complete noob to tuning, is there a video you would recommend to watch first..? I have read an article by Oscar liang to get familiar with PID, and I’ve watched a handful of videos, but like I said, everything thus far, is from older versions than what is out now.. I’m still trying to understand PID and filtering, not to mention black box.. lol.. please help..! I actually started to try tuning one of my recent builds yesterday but stopped where I was at, because I have no idea what im doing and before I go any further with it, I want to have a better understanding.. please and thank you..!

how come on ardupilot pid defaults the I terms are so low? If this applies too for ardupilot

Trying to tune out a persistent low throttle cruise wobble on my 7”. Help?

What setup is that quad? Looks really compact and clean!!

In your 5" presets you have tpa higher , what should tpa be at for this quad

The best PID explained video ever!!!

Sorry if this is already asked: What frame is that? Also great video as always :) :)

Integral (delayed response) P (proportional [to the error] response) derivative (quick response) they must be adjusted to fit the inertial mass in order to be fast but not oscillate and to correct also the minimum difference with respect to the aim.

My two Chim7's when cruising strait have pretty fast but small L&R wiggle ! I got to to try sliding something ! oh dear!