Servos do not move

ArduPlane Plane 3.8
1

Had a plane with an mRo Pixhawk working prior on an earlier Arduplane release. I upgraded to Arduplane 3.8.5 now and set things up the same as before.

But I cannot get the servos to move.

In Mission Planner I see the RC channels in changing as per stick movements on the transmitter. I also see RC channels out changing.

I measured 5.1 volts on the servo rail (separate regulator), and the servos do their usual twitch on power-up. They just do not move after boot-up.

I disabled the safety button feature. I calibrated the compass, the power module is delivering battery voltage, the GPS fix is good, it has a good RC signal.

Am I missing something obvious?

Thanks,

Paul

2

Have you assign a function to the servo outputs ?

3

Ok, figured it out - I had the BRD_SAFETY_ENABLED feature activated. I deactivated it and the servos now behave normally.

Thanks,

Paul

4

Hello Paul,

I had the same issue with a Taranis plus and a X8R receiver in a Radian XL powered glider. Taking your clue I changed the brd safety to 0. That did not work. So I change the OVERRIDE_SAFETY to 0 as well and the servos worked before arming, the throttle did not. After arming the throttle and servos worked! Thanks much for the hint!

Thanks,

Don

5

Hi Don,

I’m glad you got your system sorted. I haven’t done an ardupilot project in a few years now and when I do again I’ll bet I have the same problem before remembering the valuable little tricks.

Be well,

Paul