Quadcopter using (Pixhawk 4) Motor 1 and 2 are heating up and motor 3 and 4 are fine

ArduCopter Copter 4.0
21

I am using Emax 935 kv motor and 4s battery.
They recomended

  1. 10 inch prop for 3 S battery
  2. 8 inch prop for 4s battery. (Currently using)

Can i use 10 inch prop? Will it cause for motor heat increase?

22

I just mentioned it because your hover PWMs are right in midrange where they should be.
If you do add weight you’ll just have to see how those props and motors handle it.
Best to check all the specs, maybe run it through ecalc. ecalc costs less than the price of a set of props, but you can use it for free with limited choices.
https://www.ecalc.ch/xcoptercalc.php

1 Like
23

Okay shawn.
Thanks. Will check and let you know.

24

Hi Shawn

With your suggestion I did some modification to my frame and finnaly got these results below.
Please check them and let me know whether everything is good or need any changes.

Screenshot (4)
Screenshot (4)1366×768 72.5 KB
Screenshot (5)
Screenshot (5)1366×768 61.6 KB

25

That looks good, be sure to follow through all the rest of the tuning. There’s hundreds of posts here covering every aspect.

2 Likes
26

Okay Shawn.
Thanks for the reply.

1 Like
27

Hi Shawn,
Suddenly motor 1 and motor 2 is not working.
2 days before i have flown and landed properly. After 2 days I went for flying today 1 and 2 motors are not running.

Please let me know what might be the problem.

28

Either a connection/broken wire problem, or ESCs have failed.
If those are genuine Emax ESCs they should be good.
If the motors connect to the ESCs with bullet connectors check all those, and the wires tend to break right at the edge of the bullet connector.
Check soldering.

1 Like
29

Hi Shawn,
Everything were perfect, but still 1 and 2 were not running. I even tried esc calibration, after that also 3 and 4 were only working.

Then I uploaded Rover firmware. After completing the 100% uploaded the 3 and 4th motor were spinning in another few seconds followed by 1 and 2 motor started to spinning.

Then I disconnected the battery, again uploaded copter firmware and again did all the basic calibration then everything came back to normal.
Now the drone is flying properly.

But why did happened, that am not able to figure it out.

30

Hello shawn,

I have replaced my motors, ESC’s and propellor with T- motor combo pack (F-450). Completed the test flight.
Please check the LOGS and suggest for any changes.

https://drive.google.com/drive/folders/1-jgIYvC31PkqAw_SuRmu7wW9fX172MEn?usp=sharing

Thanks