Trex500 GF with GY401 and stock ESC in governor mode - unknown behaviour

[bnsgeyer (Bill Geyer)]

@K4cus

It wasnt very windy, heli was hovering straight. 30 deg of roll and 10-20 pitch is impossible. Of course I had to come back to position sometimes, but at hover heli was leveled. I am thinking that arducopter sometimes get wrong attitude of the heli and sometimes it is ok.

It shouldn’t get the attitude wrong. If it does then there is a problem with the controller or it’s not getting all the information it needs to estimate the attitude properly. Do you have a GPS connected to the controller? The Matek 405 STD does not have a compass. So if you don’t have a GPS with a compass built in then I think the controller will have a hard time keeping the attitude solution from drifting. It needs other information to keep the IMU from drifting.

@K4cus

I am using external gyro. Which parameters from the tuning table do I need to tune for yaw in that case? I would like arducopter to stop messing with yaw, as gyro is doing a good job,

Please read this post I made on another users thread who asked the same question.

Doubt for YAW and ext Gyro interference

Hi all, i will start first fly with Pixhawk on my traditional hely Trex 500, but i have some doubt for yaw control. I have external Futaba GY401 gyro with servo. 1- if i move my radio stick all ok 2- if i move helicopter (with pixhawk in the table) the gyro work ok 3- if i move Pixhawk … the pixhawk move the tail why? if there is a external Gyro why pixhawk try to correct tail same an gyro ??? H_TAIL_TYPE = 1