I've guys this is my first discussion here so first of hi to all
I've a strange issue that make tho motor 3 and 4 (CW motors) very very hot
If I see the logs I can see that they in hovering output high pwm values than others. So I searched the web and I've found this guy with the same problem as my but the solution discovered didn't work for me (Adjusting the PID's).
I've made all this things to try to fix this problems but none of them has worked:
Calibrating accelerometer, compass
Swapped one motor
Changed one esc
I have used extra weights to improve CG balance
These are my quad specs:
Motors 4x sunnysky A2212 + 4x 1045 prop (balanced)
ESC 4x 30apm simonk
Pixhawk + ublox m6
Telemetry 3DR radio
Battery 5000mha 50c
3DR power module
I've attached some logs
This is an example of pwm output
Sorry for my bad english
I've tried to held the copter in one hand but to get motor outputs leveled I had to rotate slowly CCW (to help CW motors)
are the propellers the same type/manufacturer/pitch ?
two of them are supposed to be "pushers" ( have opposite direction or rotation)
- are *all* mounted the same way ? (for example with text/size information "up") ?
and all rotate like : http://copter.ardupilot.com/wiki/connecting-the-escs-and-motors/ ?
we assume your hot motors are hot because of higher power(producing more thrust) - because you've tried to swap them, and eliminated bad motor widings/magnets, bearings etc.
The only way 2&3 (clockwise) rotating motors can produce more thrust while in hover with no yaw is:
1: if 1&4 performs very differently, (other propellers)
2 if 1 or 4 are mounted on a round arm, and are slightly "rotated" , so they are not pulling only up, but also creating a yaw that 2&3 needs to counter.
or in other words: if 1,2,3,4 consumed the same amount of power , had same props, and gave equal thrust, you would have a fine hover - if 2,3 actually works harder as it seems, - it should have yawed all the time, if the power/thrust was the same for all motors.
Thanks a lot, I sloved. The problem was a slightly rotated motor! :)