Trex 450 Pro v2 Flybarless - need PID values!

Posted by Chris Pitts on March 29, 2012 at 12:05pm

Hey guys,

 

I've got my T-Rex 450 all set up. I loaded the stock software with the stock PID values. It held stable fairly well, but I got no rudder when I moved the stick.

 

Then, I changed the P values for rate and stabilize on the rudder. I got a movement, but not much, and I got more unwanted movement (oscillations) than desired movement. That flight ended with a $100 tree landing.

 

So does anyone have a good, solid set of PID values for stabilize mode on their TRex 450? I get the distinct feeling that working this from scratch will be a recipe for bankruptcy, and I'm already working on a college student budget. Any help would be most appreciated.

 

-Chris

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Replies

  • Wesley Chuen April 25, 2012 at 7:22pm

    Hi Chris,

    I have the T-Rex 450 Pro V2 as well.  How is your progress on it?


  • Rob_Lefebvre March 30, 2012 at 6:54am

    Yeah, external gyro or not?

    I'm using the built-in gyro, Yaw Rate P is 0.350, I is 0.015, D is 0.03 IIRC.  Yaw Stab P is I think 2-3 (this is less critical), and I is zero.

  • Developer
    Randy March 30, 2012 at 6:21am

    The stock PIDs should work ok.  Are you using an external gyro?  If yes, you should be sure to click the external gyro check box in MissionPlanner's set-up screen, on the Heli tab.

     

    If you're not using an external gyro I'm not sure exactly what values will work.  Robert Lefebvre should know.  You can find him on the monster trad heli thread.

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