Varying motor PWM values when throttle is increased

ArduCopter
, , , ,
1

Hi,

I have an F450 drone that is using EMAX Pro 2810 1150kV motors, 51A DShot ESCs, and a 4s battery, and I have been having trouble dealing with a terminal vibration issue. When the throttle is increased (to about 50%), the drone starts vibrating very severely. The logs show that two motors at any given time have vastly different PWM values (~100-200), and when one increases, the other decreases. I believe this to be the reason for the vibrations but would love to hear others’ input. The drone is unable to fly, and when I increase the throttle even more, the shaking increases as well. I have linked two recent test logs here and here and would love to hear any potential causes and/or fixes for this issue. There are no loose parts, and the vibrations only happen when propellers are attached. I have also balanced the propellers. Would differing PWM values cause vibrations? The motors that differ are usually the ones that spin in the same direction. My setup did work for a day very well and with no hiccups, but since then, I have not been able to get the drone off the ground. Any help would be appreciated. Thanks!

2

Here is a snapshot of one of the logs where the variance is seen.

image
image1049×501 16.4 KB

3

You have severe output oscillation from very poor tuning. And the 1st thing to do is change to Dhot600. 1200 is not Stable. But, there are many other things wrong. Start over and use The Configurator.

1 Like
4

Hi Dave,

Thanks for the response. What is the configurator? And how would I go about starting over and tuning it correctly? This is my first drone so I am new to all this. I will change the protocol to DShot600, but could you elaborate on “there are many other things wrong”?

5

The list is too long. Reset to default and go here and get to work. The Configurator
It’s meant for beginners like you.

1 Like
6

Ok, thank you for the help! I will restart and use the configurator.