I’m setting up a Wing Wing Z-84 with a Pixracer R14 and the latest PX4 flight stack release v1.8.0 using QGC v3.3.2 However, the roll correction is always backwards in stabilized mode (the ailerons always move in the opposite of the correct stabilization direction). The pitch works properly in sta…

How do I reverse the sign of the outputs? PWM_[MAIN|AUX]_REV[1-…]

Did you try swapping the servo plugs between MAIN1 and MAIN2? Good luck.

That just doesn’t make sense. What Tx are you using? Did you create any elevon mixing? If you did, you need to remove it make it just a standard setup of CH1-4 in AETR or TAER sequence. Whichever you use, make sure it calibrates correctly in QGC. If you confirm that your servos are connected as belo…

I’m using a Taranis with a D4R-II receiver. No, I didn’t recreate any elevon mixing, just the standard CH1-4 in AETR setup and re-calibrated multiple times via QGC.

How are you connecting the Rx to the Pixhawk? Are you using a PPM encoder?

No, I’m not using a PPM encoder. The D4R-II already supports PPM so it’s connected to the Pixracer using a single cable. Notice that the elevons work correctly in Manual mode. The issue is with the roll correction in stabilized mode; which is mainly controlled by the firmware code. Therefore, the…

Hi Al, What pins are you connecting a single cable at on a Frsky V8r4-II? To the best of my knowledge that is a all pwm receiver, the D4r-II has ppm single cable out. These are two different receivers. I could be absolutely incorrect here, as I often am. Most FRsky receivers that work with Tarrani…

Hi Mitchell, That was my typo. I’m indeed using the D4R-II with a single cable (CPPM). The problem is that I cannot change PWM_MAIN_REV* params via QGC . Therefore, it seems that I’ll have to add them manually into the 3033_wingwing file and rebuild the firmware.

Hi @Al_B , Can you confirm that the roll orientation is estimated in the correct direction by looking at the artificial horizon in QGC?

Hi Bresch, Yes, I can confirm that the roll orientation is estimated in the correct direction, see here .

Reversed elevon in stabilized mode

PX4 Autopilot

Al_B July 3, 2018, 11:29pm 3

Yes, I did and it didn’t make any difference. It’s really puzzling since I know @LorenzMeier got it working with previous version of the flight stack.

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Reversed elevon in stabilized mode

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