Discussions

PX4 with QGroundControl Firmware Armed OK but Motor not spinning?

Posted by Hunter Wang on September 7, 2014 at 6:29am

Hi Guys,

I am using the PX4 FMU V1.7.2 with IO V1.3.1, QGC 2.0.3beta, the latest QGC firmware, Quad with 4 x 40A SimonK firmware ESCs and 2815-470KV motors.

The installation/setup was straight forward, the firmware was updated smoothly, the RC and sensors calibrations all went well, when I try to arm the PX4, it will showing armed in the QGC, all radio inputs can be seen from the Mission page, but the motor doesn't spin at all...:( It's like the ESC is totally not armed, no sounds ever came out of the motors...

I have tried the same setup with the PIXHAWK I have, same result, all okay but motors never spin.

Tried both setup with Mission Planner and both 3.1.5 and 3.2.0-RC5 firmware, all working fine, didn't test all features fully but at least the motor spins fine when armed/throttle advanced...

So my questions are:

- Is there something wrong with the QGC firmware or it's something obvious I haven't done?

- How do I calibrate the ESC under QGC firmware? (I have done that manually via radio. I know how to do it with AC3.x firmware but not with QGC firmware)

- Any feedback of how the QGC firmware performs are really appreciated.

Thanks in advance!

Regards,

Hunter

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Replies

  • Hunter Wang September 16, 2014 at 11:55pm

    Found out what was the problem, for someone who might experiencing the same issue, it was because the airframe model was selected wrong, and the /etc/rc.txt, /etc/config.txt files not created on the SD card.

    • Myunggun Kim > Hunter Wang October 12, 2014 at 1:57am

      Hi,

      I got same problem with you, but I could not solve my problem with your answer...

      Therefore, I want ask you some questions.

      1. What airframe model you chose for your quad?

      2. I checked my SD card and I do not even have etc folder. Should I create etc folder and txt files myself? 

      Thanks

      • Hunter Wang > Myunggun Kim October 14, 2014 at 4:17pm

        1, 4001 or 4011

        2, yes, that what I have done.

        • Myunggun Kim > Hunter Wang October 14, 2014 at 5:40pm

          Thanks your for your answer.

          May I ask u one more question?

          Are you sure with that I should create even the rc.txt file??

          What I read on the px4 document said that the rc.txt file make the system unable to start.

          Also, I created the config.txt file myself, but I have no idea what should I write down on the rc.txt file.

          Could you give me some examples or could you attach the file you made?

          Thank you Wang! 

          • Hunter Wang > Myunggun Kim October 14, 2014 at 8:56pm

            No sorry, you don't need the rc.txt anymore, the autoconfig will do most of that for you. Just config.txt will be fine.

            I don't have the PX4 with me ATM, will upload my config.txt later.

            • Hunter Wang > Hunter Wang October 15, 2014 at 2:22am

              My /etc/config.txt file:

              # Generic Quadcopter x
              set VEHICLE_TYPE mc
              set MIXER FMU_quad_x
              # PX4IO PWM output will be used by default

              set PWM_OUTPUTS 1234 # Change parameters for the first 4 outputs
              set PWM_RATE 400 # Set PWM rate to 400 Hz for better performance

              • Myunggun Kim > Hunter Wang October 15, 2014 at 6:17am

                hmm... I tried, but I failed my motor to spin.

                I cannot understand that other ppl easily make the px4 work with QGC, but why I can't??

                Thanks any way Wang. I guess the cause of my problem is different thing.

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