Uncontrollable Yaw as soon as drone is armed and throttle is given [solved: incorrect motor configuration]

ArduCopter Copter 4.5
1

Hello everyone,

I’m struggling with uncontrollable yaw as soon as I add throttle on my 7-inch drone.
I tried the methodic configurator, tried reflashing and installing from scratch, nothing seems to help and I am really out of ideas and in need of some tips.
I will add a picture for quick view of the yaw and the log file on google drive of one of the indoor flights i did with the drone.
Many thanks for any help you can provide.

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Build Details:
-Frame 7-inch quad
-Battery: 6S LiPo
-Flight Controller: Matek H743-Slim
-ESC: T-Motor F55A Pro III 4-in-1 (BLHeli_32)
-Firmware: ArduCopter 4.5.7

2

Hi,
What Frame type have you selected?
BetaFlightXreversed (18) gives this symptom.
Try BetaFlightX (12)?

Hope this helps.

1 Like
3

Neither would give this symptom if Motor Test is used in Mission Planner and order and direction are confirmed correct or corrected for the frame type selected.

2 Likes
4

It did for me, but I was only trying to help! Fifteen years of building these mosters has shown me a few odd behaviours!

5

My point is it doesn’t matter what Frame Type you select (1,12,13,14 or 18), and you can initially wire them in a random order. Run Motor Test, determine if the order and direction is correct for the frame type and if not re-factor the servo outputs and motor directions and go. This one is standard quad-x.
The problems arise when Motor Test is not run or it’s misunderstood what order the motors run when the Letter buttons are pressed.
I don’t think an Arducopter topic has been flogged as much as this one.

2 Likes
6

Arbitrarily trying another frame type is usually not the solution. You got lucky. @dkemxr has described the proper diagnosis steps.

7

Hello guys and thanks for your help!

So I tried and switched the frame type to 12, it unfortunately didn’t bring much as the drone still immediately starts to yaw.
I double checked the motor order and they are all correct (A, B, C, D) from top right to top left.
My props are all set to spin away from the frame.
I did some more testing today, and I noticed that the spin speed gets faster the more throttle I add.

I have to mention something that might be important,I didn’t manage to calibrate the ESC from mission planner sofar, I am struggling with the t-motor F55a pro iii esc and cannot find a manual for it. (T-MOTOR F55A PRO III 55A 3-8S BLHeli32 4-in-1 ESC - 30x30).
you think that might be related ?

8

but according to the ardupilot esc calibration page:

  • If you are using a digital esc protocol like DShot or are using CAN ESCs then you also don’t need to calibrate them, so skip this page. The section at the end on ESC settings is still applicable, however.

and If iam not mistaken the F55 esc uses Dshot

9

Not an expert but MOT_SPIN_ARM and MIN seem a bit too high for a powerfull drone

10

Get the motor directions correct, and continue following the methodic configurator procedure.

1 Like
11

Why, when the Frame Type is set to Quad-X? Is that what you see here?

IMG_3373
IMG_3373902×854 104 KB

1 Like
12

it is not but dumb me thought I could use quad-x with outer rotating props like in betaflight, well time to fix it.
the numbers have to allign with the letters right ? as A has to be motor 1 and D motor 3 ?

13

audio

this should work if i have Frame 12 selected right ? I reversed the motors and made them as they are shown in the picture of Frame 12

14

It flew without any issues, and was stable enough!
Thanks for all the help, 1 issue solved now on to solving the current issue, keep getting battery unhealthy.
Thanks guys

15

Yes, that is the classic error: incorrect motor order/direction configuration.

Now continue with the methodic configurator, this time without skipping steps/procedures.