Had my tri-copter flying ok with APM and Mission Planner. For a number of reasons I changed the firmware over to PX4 (FC is a PX4 FMU) and QGroundControl.
I'm having trouble getting the Yaw Servo mapped correctly. It's physically connected to Main Output 7 on the PixHawk. Rail is powered by one of the ESCs.
When I press the Safety Switch to enable signals on the Main Outputs the tail motor (MO Ch 4) starts spinning. Front right motor is on MO1 and front left motor is on MO2 (this was the setup with APM firmware).
Anyway I need a pointer on where to look in QGC to get this corrected.
Airframe selected is the Tri-Copter Y- Geometry (no clue what the difference is between Y- and Y+).
Any pointers would be appreciated.
Thanks,
Ed
Replies
I'd ask you question on the PX4 Flight Stack google group: https://groups.google.com/forum/#!forum/px4users. This looks like more like a wiring issue associated with the mixer setup for the airframe you have selected. That is all under control of the firmware mixer and not parameters which could be changed by QGC.
If you are using the very latest QGC Daily Build (http://www.qgroundcontrol.org/downloads) under Setup/Airframe you should see rotor direction differences on the icons for Y- and Y+.
Thanks Don. I ended up with a short list of issues trying to get PX4 and QGC working so I reverted back to APM and Mission Planner. I see a lot of promise with QGC but I needed a little more knowledge (documentation) to get it (and PX4) working for my aircraft.
I was having a radio/telemetry issue that forced me to try PX4 and QGC. The problem persisted and this morning after a close visual inspection of my remote radio I found a tiny resistor that had a bad solder joint. I touched it up and the radio started working again.
So, I'm back to APM and MP for the time being.
I agree, the issue above has more to do with PX4 than QGC. I'm still curious about the frame descriptions so I'll take a look at our suggestion.
Thanks again.
Ed