After Arming my copter 4.1.2 one motor does not spin At same time

ArduCopter
1

Pixhwak 2.4.8 clone ,

i have followed all the steps from loading firmware to calibrating …
first test flight worked fine …

but for second test flight after arming 1 motor is not spinning and rest 3 are spinning correctly…
After giving little throttle the motor which was not spinning starts spinning ,but with less speed as compared with the other 3 motors…
I Have checked each of the motors during calibration and they work fine.

i have gone through setup once again but the problem persists… please help…

Please help me I’m highly greatful too you thank you

2

re-calibrate your ESCs, and if needed increase MOT_SPIN_ARM a bit. But make sure MOT_SIPIN_MIN is bigger than MOT_SPIN_ARM

3

Thank you reply for question

Individually callibrate ?? Or four togather ??

4

All four together. There is ESC calibration procedures defined in the documentation, and it also discussed a lot in this forum.

5

Done ESC Calibration just but same problem having i think i should change MOT_SPIN_ARM and MOT_SPIN_MIN.

But how much value is best for copter approx how much can change ??

Thank you

6

Increment it in steps of 0.01 up to a max value of around 0.15

7

Okay ,let me do this that you said me and after i will text you what happen…

Thank you @amilcarlucas

8

Use MissionPlanner motor test to find the lowest reliable start up value and set that as MOT_SPIN_ARM

9

New build I noticed mine was doing that, I think it was the joystick not being straight when raising , also calibrate the radio

1 Like
10

@amilcarlucas thank you my problem solved …

11

I just finished setting up my first build, after arming my copter, none of the motors spins until the throttle is at about 87%(got this from the motor test) I have tried esc calibration several times but even after calibration the problem still persists. Please help figure out what is going on

12

You need to post a .param file.
Check MOT_PWM_MIN and MOT_PWM_MAX parameters. And redo the ESC calibrition until it works.

The motor test must be able to rotate the motors at most at 15%

87% is just too high.

13

latest.param (15.3 KB)

14

This is the latest log, so far nothing has changed, I did another calibration but the results are the same

15

What ESC’s do you have? There is nothing in that parameter file that would cause a problem.

16

Simonk 30A, microzone MC8B controller, pixhawk 2.4.8, dji 2212 motor, f450 frame

17

Well, you should replace those with some current technology BLHeli_32 ESC’s. Then you don’t have to worry about calibration and there are several other benefits.

18

Any suggestions, am currently in china but most retailers do not have the BLHeli_32 stocks

19

For single ESC’s I would probably go with Aikon or Spedix as I have had good success with both. For 4in1’s there are many to choose from. Pick one that has the current capacity you need.

20

hello,

what should I do when my drone motor can’t turn at the same speed… when the throttle is held at half, 1 out of 4 motors slows down. this causes the drone to be unable to fly in a stable / normal condition.

I hope to anyone who reads this forum, help me to solve this problem.