How to use INAV Servo Autotrim

[@FPVUniversity]

Updated Autotrim tutorial kzbin.info/www/bejne/eIDcYZdvYthpi8U

[@ringonotts]

OMG thanks Pawel. 1 year later and multiple reads of the wiki and i finally learn that you need to land with it enabled. I'll try again....

[@tedhancock68]

Thanks for the clear explanation. Autotrim and autotune have always seemed too much like magic for me to attempt. Perhaps, between this and Painless360 I will get the courage to give it a try.

[@swissfreek]

Auto trim is such a lifesaver compared to the old method of fly, fight the aircraft, land, adjust, fly again, still fighting the aircraft, oops adjusted in the wrong direction, now it’s worse, etc. I would still recommend that after auto trimming, now that you know what your servo centers are, if they are way off center, go back and adjust the mechanical linkages and then reset the auto trim. If you don’t do that, your servo “centers” could (theoretically, in a bad setup) be near the end of travel, and then weird things will happen when you try to input control movements. My point is don’t be lazy and have a horrible linkage setup and count on auto trim to fix it all for you.

[@rnoma6898]

Excellent. I would add that if you're burning fuel in the process, then pick a midpoint burn off to do it because your CG is relative. After doing this, a look at the control surfaces on the ground when the computer thinks its stable will tell you where your drag is. Oh, don't forget your throttle range during the autotrim.

[@WRENTV]

@Paweł Spychalski is it better if I just enable "Continuously trim servos on Fixed Wing" in configuration tab?

[@Freebird_67]

I most apologize for being an ass the last few weeks. I finally managed to get my F411 FC working on my AR wing and I most say I’m very impressed! All be it I need to do some tuning all features where working properly including RTH which is a big one for me. All in all coming from Arduplane to inav was a huge learning curve and I’m still quite new to inav I have to say it’s functions are great and really user friendly once you get over that hump which ever that may be for each build. My only concern now is failsafe which I really haven’t tested thoroughly yet but I’m using The X8R receiver with QX7 transmitter that’s set to no pulse but when I tested on bench by turning off radio the AR motor spins up and continues to spin until I power my radio back on and it reconnects , then and only then can I regain control. Maybe I need to research slot more on this failsafe thing because I’m not to sure that I have it setup correctly in my AR. I want FS to put the inav into return to home and hopefully that’s what I can do. Can you give me some advice on this? I can confirm though that switch RTH does work and works flawlessly but FS /radio signal loss is a huge concern of mine. Thanks again for your patience and thank you for all the hard work and hopefully you accept my apologies.

[@hansleatherby1032]

Great video, thanks for the hard work and help regards Hans

[@derrickmitchell39dm]

I'm going attempt this tomorrow.

[@MrVasmikey]

Thx PAVEL! Great video.

[@mayberrywj]

Another great video, thank you....:)

[@HiusLighting]

Pawel, thank you!

[@Gregmaan1]

Hi Pawel, I should mention that it is not clear what you mean with the word "trim" in this video. I thought I should trim the wing with my RC so that the FC knows what are the midpoints for level flight and for RC input measurement. But on telegramm someone told me I was wrong. Maybe you should add some text to the video so that everyone knows with the word trim you mean to hold the sticks that the plane flies straight.

[@shawnzfpv]

Autotrim adjusts the servo midpoints for level flight. You are talking about your radio for center on the stick is 1500 on all axis. So.. you should do both :)

[@pilotmiami1]

thenks

[@AlexFlyAndRide]

Спасибо чувак, помогло!!!

[@john_h9281]

Pawel do you use Autotune first to tune the PIFF then use Autotrim to trim the Servo's ???

[@FPVUniversity]

autotrim first

[@staydown.normal5323]

i was told to turn off auto trim before landing so the landing dosent mess up the trim.... then save once i landed by disarming or saving with pc or sticks

[@FlyingOttoman]

Would you do a similar video about Autotune please? There is much controversial about this topic. Thx in advance

[@FPVUniversity]

Yes, I already have done half of material on Autotune. It only needs some voiceovers and editing.

[@piexyz83]

Hi Pawel and thank you for your valuable informative videos you make on this channel not talking about the great development work you are making for inav... But my question is another kind... Why you say "ciao" at the end of your videos? Are you somehow related to Italy? Ciao... :)

[@FPVUniversity]

No, no relation to Italy. I worked with an italian or two in the past tho

[@pro100_serg5]

THANK YOU VERY MUCH!

[@seniorblackfox7001]

Thanks… good explanation. Have set this on a switch and will try as soon as weather breaks. Have been trying to use OSD menu and Stick functions to set Trim Acc settings. Do not find in OSD. Are Stick Functions supported in 1.9.1. All servos are set to 1000-2000.

[@rarespaul9503]

can I fly horizon (so controller flyes the plain level) and enable autotrim while I am still in horizon mode or do i have to fly acro or passtrough mode

[@ShawnG_FPV]

I'm curious about this as well, any info would be helpful, Thanks!

[@JaviRP97]

As far as I understand, any stabilized mode (such Horizon) would need the correct trim to fly leveled. So if the plane is not trimmed, once you enable horizon, it won't flight straight regarding the plane, but regarding to board alignment (generally not perfectly aligned to leveled flight). To sum up: you need to trim first and then use horizon, not the opposite.

[@rkorenek]

Yes you can fly in Horizon Flight mode and do an Autotrim. Then you will be trimmed for all flight modes.

[@Woodsywoodsy-sj9qy]

Hello, I just bought my first wing after flying & building quads for 3 years but I'm hitting a snag with iNav. No motor can be seen in the tab or servos in the tab. It is yelling me to goto mixer, but the mixer is telling me to get latest firmware to use. I'm on configuration V 2.0 rc3 Running inav 1.9.1 on a matek F411 wing Omnibus f4 pro & SPRF3. All with same problem. If I use the S800 preset and arm it. the servos move as expected if I tilt the model. & the motor will twitch if I throttle up. But they have no input to the boards. Any help would be appreciated, thanks.

[@DZARO]

What flight mode should you be in, before activating AUTOTRIM? MANUAL or ACRO?

[@goku445]

Doesn't matter. I'm using CRUZ so it flies straight with no input ;). edit: Pawel says acro is best.

[@FreeBirdFPV]

in witch mode you should do in acro or stabilisation mode or it dost not mater

[@theinnocent714]

Do i need to save n reboot after servo auto-trim? I think i need to save and reboot after auto-tune though righ? Building a few with F4 FC and im trying to learn all there is to know about it, thank u.

[@McDexterPL]

Why have to land to store trims to eprom? It would be much better to have ability to trim in air. I presume for drones it's not an issue but some airplanes, like multiplex, need often small trim adjustments especially when i change to different battery. Its very hard to keep center of gravity unchanged. And every time start and land... Difficult option. Why not to store settings after another 5secs with message trim success.

[@nicfpv9969]

The autotrim is done is manual flight? Or stab flight?

[@FPVUniversity]

Stabilizer,. acro preferably

[@staydown.normal5323]

what first auto trim then auto tune? what one should i do first. and what mode should i use manual or acro ?

[@FPVUniversity]

In exactly this order: autotrim -> autotune. Both in Acro

[@itsnotbutter7336]

Can i use the same switch for each auto (trim/tune) mode?

[@ChristianMixLocutor]

okay, let's see if I get it right, I leave my model as mechanically trimmed as possible, I start flying in stabilized mode, I activate the autotrim and fly for at least 2 seconds without giving any command so it stays stable, I keep the autotrim mode until the landing and when it is on land deactivates the aircraft and it will automatically save the new servo points? That's it?

[@tedhancock68]

My understanding is that you stay level. So if you have to give minor control adjustments to do so, it's OK. Those commands will be averaged into the final servo position. Perhaps Pawel can clarify?

[@ChristianMixLocutor]

I learned today that there can be no wind, it has to be on a very calm day, I took a model airplane of mine that flies in manual mode perfectly and I made the autotrim with a strong and turbulent wind, the airplane did not fly but in manual mode, I had to do the auto trim again in the early evening when it was already windless and everything was ok.

[@Koestel-FPV]

it's a problem if I use the same 3-position switch (none, autotrim, autotune)? Thanks

[@Kestrel_WhiveZ]

Salut ! As-tu trouvé une réponse à ta question ? Je début sur InaV et en aile volante et j'ai pas mal d'interrogation dont celle-ci :) merci

[@NoAgendaFPV]

So if I do an autotrim, but I am not happy with the resulting midpoints, then I can switch off autotirm mode and then redo it again in the same flight? Thank you for this video, I read through the iNav info but didn't fully understand this function

[@FPVUniversity]

yes

[@a_dog_and_a_man]

Do I really need to land or is it enough to disarm in air and arming again for save settings?

[@FPVUniversity]

Disarm in the air will do too

[@a_dog_and_a_man]

Does it matter how long i disarm?

[@humbertomontalban3932]

I make shure all my servos are center, then on INAV check my radio outputs are 1000 1500 and 2000, then flight the airplane and land adjust the control rods up to the point that I have strait and level flight with manual activate in inav, then flight one more time, airplane now may be flying strait, next switch to angle and see what the plane does, and now observed nose deep down loosing altitud or banking left, land and adjusto roll or pitch in Inav board aligment, ones the plane flight level and strait im done and continued with gps flight modes.

[@Chris-vc1dh]

hi Pawel, does servo auto trim replace mechanical trim on the linkages? thank you

[@PacificSword]

technically yes, but what you should do is go back into your FC after, and do your best to manually trim the linkages so autotrim has less work to do. technically... lol

[@Arvycka]

So is it OK to do autotrim while flying in "Angle" mode? O is it necessary to fly manual? At the moment I use "old school" manual trimming using iNav channel forwarding.

[@FPVUniversity]

Yes, it's ok. Still, Acro is the best

[@EnglishTurbines]

Soooo....when you use the Auto Trim function, I need all my trim levers centred first..?....Or does it not matter?.. and I can centre them after saving Autotrim by disarm?

[@FPVUniversity]

It does not matter. It will just set required trims for level flight

[@ziadelghoul3373]

I'm not able to flash the firmware on F722 mateksys. Help please

[@Just-A-Guy-Learning]

If you disable autotrim it wants to pitch down and add left roll. Its a nightmare

[@jaseduar]

hello, after save the new midpoint of the servos with auto trim, how can I reset them after they been saved? I mean to start from zero

[@alphapapa77]

There is a spot in the configurator - I think configuration tab - to manually input trim numbers. Just zero them, save, and reboot

[@joenaylor34]

Tried auto trim 3 times now on my first INAV plane build and each time it sets up the controls in a cross controlled manner, which means the ailerons are banking right and the rudder yawing left. Thus the plane flies sideways. Not sure why it is doing this.

[@staydown.normal5323]

revers the sevor on inav

[@humbertomontalban3932]

question this works on acro, or normal? , or you have to switch to angle or horizon?

[@FPVUniversity]

dosn't really matter

[@nucleo1772]

Panie Pawle bardzo ciekawe video Chciałbym sie zapytac czy jest mozliwosc aby autotrim uzyc gdy sie ma włączone horizon mode bądz angle bo za chiny nie moge utrzymac mojego skrzydla dosc stabilnie prosto gdy mi FC nie pomaga Druga sprawa to taka ze wciaz nie moge dojsc czy moj receiver L9R i cały inav jest odpowiednio skonfigurowany jesli chodzi o utrate zasiegu w powietrzu i czy RTH sie włączy.....a boje sie wyleciec wysoko i wyłączyc transmiter....ma pan na to jakąs rade jakis pomysł dzieki i prosimy o wiecej filmikow o inav...

[@FPVUniversity]

Do tego potrzebne jest trymowanie akcelerometru, tego się lotkami nie załatwi

[@nucleo1772]

a odnosnie mojego drugiego pytania ? jakas rada?

[@FPVUniversity]

uzbroić, throttle na 20%, przejść się 20 metrów, wyłączyć radio zobaczyć co model będzie probował zrobić z serwami, chodzić jakby naprawdę leciał

[@nucleo1772]

....no i uwazam ze po przejsciu jakiś tam kawałek i wyłączeniu radia ....jesli wszystko jest ok z failsafe to na monitorze FPV powinno sie pokazac w nawiasie RTH tak ? czyli latanie na granicy sygnału juz nie powinno byś straszne :)

[@FPVUniversity]

No nie powinno. Zawsze jest szansa że samo wróci

[@alasdair4161]

How hard would another switch position to 'save' the setting be, versus disarming? It would be so much better in the real world, as flying different conditions and batteries etc make a second (or third) takeoff just annoying.

[@FPVUniversity]

Hmm... that might make sense. On the other hand, as long as you do not change the CoG or linkage, you should not have to trim again

[@palmniej]

Hi, i do maiden flight in manual mode and trim my model on my rc transmitter, how copy trim settings to inav?

[@FPVUniversity]

The thing is that you don't. Set Acro, run Autotrim and you are done. Let flight controller handle trimming

[@palmniej]

@@FPVUniversity Ok, i set trim to 0 and try witch acro mode + autotrim, but i was try acro yesterday and model was very very lazy for input from radio. You have old video where you talk about PIFF on flying wing and recommend to set P =0, I =6~8 and leave FF for autotune. It is still actual on inav 5.0 or maybe leave all for autotune? Where i can read about setup for fixed wing?

[@nicfpv9969]

So i land and i can save with the sticks or the osd menu right?

[@ToxicFPV]

Just disarm to save like Pawel said in the video

[@don83030]

Can you be in angle mode and servo trim at the same time

[@FPVUniversity]

yes

[@zvonimirtrgovcic5499]

In what mod i must fly to do autotrim? Can you record how to program more flight modes on taranis? Because you can program only three modes on one switch and for the start you have listed at least four modes: angle, manual, rate, autotrim, autotune😉

[@FPVUniversity]

you can use multiple switches. And the best mode for autotrim is Acro

[@zvonimirtrgovcic5499]

Ok 👍

[@ShawnG_FPV]

@@FPVUniversity Look like i just got my answer to previous question, thank you!

[@goku445]

@@FPVUniversity Could you use CRUZ for a lazy/easy level flight while Auto-trimming?

[@lucbisschops]

Nice video, but if it makes a snapshot every 2 sec of the servo position, when i start to land, i can't fly strait and level. It wil record these positions aswell. So the last 2 sec are not midpoints begore i disable ( the autotrim is still activated) Thanks in advance

[@FPVUniversity]

it takes a snapshot only once

[@lucbisschops]

Paweł Spychalski thanks so if i activate when flying level it takes on snapshot and thats all👍 Just watched your inav 2.0 RC1 very clear. But still hasitating i am currently on 1.8 stable and no glitches what so ever.

[@sleepingbearffg5008]

👊👊💪💪