Hexa moves sideways, help please :)

I calibrated the ESCs, calibrated ACC, and also I calibrated Mag, and I don't know what else to do... my hexacopter moves sideways (to the left) when I start it, and I have to land it right away because it will probably flip if I push the throttle higher.

Can you guys give me some pointers on what to check?


Here is a link to the thread I had when I purchased the parts (see last posts for final parts I got):
http://www.diydrones.com/forum/topics/building-my-first-hexacopter-...

But in short, it's a H550, NTM 28-26A 1200kv motors, TURNIGY Plush 30amp ESCs, MultiWii PRO Flight Controller, Turnigy 5000mAh 4S 40C Lipo, Turnigy 9X Transmitter

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Permalink Reply by Michael Ciurescu on March 4, 2014 at 7:24pm
I tried to switch the left motor with the right, but it still moves sideways to the left, so this means the problem is not the motors...
Permalink Reply by Sean Tierney on March 4, 2014 at 7:30pm

So it drifts sideways or it starts to flip over if you apply more throttle?  If it is the later, I have had the same issue caused by props on incorrectly, motors spinning the wrong way, and a bad gyro thinking it was upside down.  I would look at those first and see if perhaps it clears it up.

Permalink Reply by Michael Ciurescu on March 4, 2014 at 8:44pm
The drone is tilted down on the left side, and it drifts to the left. I did not take it off the ground so much to see it flip, but I assume it will...

I double checked to rotation of the motors, and I am sure it is correct, also the propellers are correct, I checked this so many times, I lost count!

I calibrated the ESCs by connecting each one to the receiver (wait for the beeps, etc...), and that did not work, same result... I also calibrated all the ESCs at the same time using the MultiWii setting for calibrating (ESC_CALIB_CANNOT_FLY), that gives the same result...

I rotated motors... same result...

Don't know what to check anymore
Permalink Reply by Michael Ciurescu on March 5, 2014 at 9:21pm

I figured out what is the problem, but I could not figure out how to fix it.

It's the transmitter!!

I figured it out when I reversed the "AIL" in the transmitter, then the hexa started going to the right instead of the left like before. Then I tried many different settings, and some seemed to affect the behavior of the hexacopter, but I still could not get it right...

I don't know how to properly configure the Turnigy 9X Transmitter!  I goggled it, I watched videos... so far, I could not get it to fly straight up...

Maybe I need a fresh mind, tomorrow I will fiddle with the transmitter settings again.

Permalink Reply by Taylor on November 6, 2014 at 7:50pm

Did you fix the problem Michael? I had a similar thing with a KK V1 board, gave up and bought a KK2.1.5 which seems to be working. It's not trim on the the Tx was it? Will it definitely flip, ie. have you tried holding it or moving it around on a table to see if the correct motors respond, attempting to level itself?

Permalink Reply by Michael Ciurescu on November 7, 2014 at 12:24pm
Hi Taylor,

I don't remember the exact problem I had when I posted this thread, but I think I fixed it by disabling the auto level.

I did not mention when I first started this thread that I enabled auto level at the same time with arm, and at that time I did not know how to trim. After I disabled auto level, I was able to fly it. But only recently I realized that the problem with moving sideways is because of the auto level, and only recently I figured out how to trim the level to make it horizontal. I had many problems with my MultiWii, with barometer, with GPS, PIDs, auto level... basically everything! so all this time I was flying in acrobatic mode, and with default PIDs. Took me a long time to learn how to control it, and I still did not learn how to fly it when it's pointing in any other direction than in front. I had a really bad crash when I turned it 180 degree, because all the controls got reversed! and since I was flying in acro mode, there is no 45 degree angle limit, so I flipped it upside down, and in less then 1 second, it.... ammm.... landed! I was actually lucky because I only had to replace some props, 1 motor, and straighten some of the pins on the FC.

About a month ago I built a small H-quad from wood, with spare parts from my Hexa, and I used a Naze32 Acro flight controller. I learned a few new things with it, including how to calibrate the auto level :) So now I want to give another try to the auto level on my F550 with MultiWii.

But... even though I was not able to get to work most of the nice features, I got good enough to fly my F550 in acro mode, I gained some confidence and I attached the Tarot gimbal to it, and made a video like this one: https://www.youtube.com/watch?v=mIYogu0J16g (see the details for more info on the video)

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