APM 2.5 set up

Posted by Paul N Braida M.E on November 6, 2014 at 5:12am

I have an interesting issue with my APM 2.5's.

First of all I have a pair of them.One is set up programmed and working ppretty well.The other however is acting oddly.

I went through the same set up/program method but when connected to Mavlink and monitoring it on my computer screen the compass is approx 180 degrees out of position as compared to an actual real compass and also the axis seem to be mixed up.Roll axis shows as pitch and pitch shows as roll axis.

The accelerometers were calibrated as shown and as was the compass.During compass cal,over 6,000 points were picked up for reference.

The other issue on both is getting the external LED's to work properly.I have an external driver board for them.For example, the Led plugged into the GPS socket flashes continually even with a GPS lock.The only time is glows steady is when the  Quad is armed.The arming led seems ok and the buzzer in plug #5 works fine.

Any help with these issues is appreciated.

thanks

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Replies

  • This reply was deleted.
    • Paul N Braida M.E November 7, 2014 at 5:05am

      Thanks again Dean!

      I have all this information already.I purchased an optional led board with driver transistors on it already and it lights up great.what I found is that the GPS light will blink even with GPS lock,but will go solid only when I arm the board.A7 seems ok.A4 appears to do nothing but the beeper in A5 works perfectly.I did not see the parameters buty will go back and look.

  • This reply was deleted.
    • Paul N Braida M.E November 6, 2014 at 9:52am

      Ok thanks!

      I changed this AHRS parameter to a value of zero.The compass direction and pitch axis is fine now but my roll axis is reversed.Right is left & left is right.I tried a couple of other parameters but they screwed up the compass and pitch again.

      Any more input is greatrly appreciated.

    • Paul N Braida M.E November 6, 2014 at 10:26am

      Hey thanks Dean! you are a wealth of information.My compass is internal and yes I am looking at the HUD on the computer screen.This is where I first found my compass and pitch axis out of whack.The parameter was set to a value of two and I changed it to a value of zero.
      Ok if it is normal for roll to appear reverse in the HUD then my issues are resolved and I thank you very much.Now to solve that external LED problem.
      By the way my radio is set up proper.I've had props temporarily mounted and the motors spooled up.Any directional command from the radio works correctly.
      Thanks again

    • Mike November 6, 2014 at 5:43pm

      Someone on RCG says he got around this by downgrading to 3.1.5, setting the LED parameter, then reloading RC14. Apparently the setting is retained through the change. Means doing all the setup/calibrations again though.

    • Paul N Braida M.E > Mike November 7, 2014 at 5:17am

      Thanks Mike!

      what is the disadvantage of going to 3.1.5?

      I'm not sure of the difference between the two versions.

This reply was deleted.