Pixhawk QGroundcontrol Rover Tank Steering

PX4 Autopilot Flight Controllers đź’»
1

I am using a Pixhawk mini with QGroundControl for tank steering with a rover. In my mix setup the throttle is on channel 3 and the steering is done using the aileron on channel 0. Everything works fine in manual mode using my Spectrum Dx7s radio. When I switch to mission mode it fails to steer. In mission mode both wheels turn moving the rover forward but it does not steer left or right. I named the mixer tank and modified the standard Traxxas configuration file by changing the mixer name to tank. Any ideas why in mission mode it fails to steer.

Output 0

Z:
Steering mixer using roll on output 1

M: 2
O: 10000 10000 0 -10000 10000
S: 0 0 -10000 -10000 0 -10000 10000
S: 0 3 10000 10000 0 -10000 10000

Output 2

This mixer is empty.
Z:

Output 3

M: 2
O: 10000 10000 0 -10000 10000
S: 0 0 10000 10000 0 -10000 10000
S: 0 3 10000 10000 0 -10000 10000

2

Use the yaw axis for steering (yaw is index 2, roll is 0). Ground vehicles don’t (intentionally) roll. If you want you can still use the “aileron stick” to steer by mapping it differently during QGC RC calibration.

3

I will try try the YAW axis to see if it will work in a mission. I realize tanks don’t roll. I just like using the aileron stick and the throttle stick. It feels more natural and is easier to control for me.

I will test this at a later date. I switched to Mission planner instead of QGroundControl a few days ago since I could not get the rover working in QGroundControl. I do have it executing missions using MP so I will stay on this path for now. Thanks for your input.