This is a discussion to focus the feedback and support of ardupilot on the PixRacer board from AUAV.co.
We believe that all teething problems encountered are now resolved and so we recommend people load Copter-3.3.4 which is available for all multicopters through the Mission Planner's (and other GCS's) Install Firmware screens. Note that because regular Pixhawks are still on Copter-3.3.3 the install icon may show Copter-3.3.3 but rest assured, Copter-3.3.4 will be installed (you can check the version by looking at the very top of the Mission Planner).
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Has anyone else noticed issues with SR1, SR2 values... I had trouble connecting with telemetry to Serial 2, and discovered that its SR2 values were as listed below. All other values for SR1, SR3, etc were all zeroes. Oddly enough, after saving my config, changing the values for SR2 to 0, saving them on the copter and comparing what I had just saved in MP, the values for SR2 were saved in SR1 - the SR1 values were previously listed as all 0s. Telemetry is working more reliably on Serial 2 with all zeroes.
Values Before Changing them all to 0
Values from compare:
Why build from master when you can flash 3.4Rc1 Beta direct from Mission planner?
This was my problem Spektrum will not decode as yet on the Pixracer. Some here said it would but I could not get it to decode no matter how may things I tried. My solution was to buy a PWM to PPM and Sbus converter. I also purchased a Lemon Spektrum DSMX receiver that outputted PPM. All theses work great.
Got a pixracer on a emax nighthawk. Tried in the in flight tuning by setting a Taranis X9D dial to P for roll and pitch.
As per the instructions on the "how to" page I set the lower limit at 0.08 and the upper limit at 0.25
Wobble gets slightly worse as I approach 0.25. So I suspect I have to go lower.
Do people in general do auto tune THEN manual tune? Do you think coupling for the pitch and roll is OK for a nighthawk? I am thinking I should decouple it.
Do a manual tune first. You'll probably need much lower values than you're trying to set - I have a larger quad than yours with PI set to 0.02 and D 0.001. Once you've got it hovering stably without oscillation in stabilize mode, and you can do left/right/forward/backward movements without inducing oscillation, then flip your autotune on.
Thanks,
Yes with lower value , It's better, takeoff but unflyable.
Keep going! If you have too low value it's unflyable like a boat, like you've found. Too high and it oscillates, as you've found. On these small craft there's a tiny range where it's stable.
I precise again that i am not a beginner in ardupilot (drones, plane, rover on arducopter, ardupilot and ardurover over 4 years...)
Thanks in advance for your help
Some news about pixracer:
- ramp suspected was due to manual calibration of my esc, arducopter needs an 'auto' calibration by the fc, becareful to make this in oneshot mode mot_pwm = 1 if you use oneshot with param = 2 not working
- with lowering drasticly Pid (P and D), no more wobble
Regards and enjoy pixracer!
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