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Permalink Reply by Joseph on April 1, 2012 at 6:53am

Did you have any luck getting this working. I am have the same issue with this.

I have not gotten any new info as of now.

 

Thanks

Joe

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Permalink Reply by OG on April 1, 2012 at 7:22am

i have a similar setup on power up my gamble moves on its own & settles in flight so yes this is normal . the servos should be plugged into the APM output not in to the receiver ?

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Permalink Reply by Joseph on April 1, 2012 at 9:28pm

I got mine working today but the continuous servos are impossible to trim to stop them from moving all the time. I had to swap them out with a 180 and a 90 deg. servo. I ill get more info out to you tomorrow on my parameters.

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Permalink Reply by Shyam Balasubramanian on November 3, 2012 at 7:41pm

Dear All,

I am using continuous rotation servo for 'Yaw' control of my camera gimbal. I am using it for stabilization around a setpoint/ target angle, using PID's.

If I give a target of say 60 degrees, the servo should adjust its speed in such a way as to make it to 60 degrees (in a circle of 360 degrees).

The AHRS system gives a DCM Yaw output from [-180 to 180], i.e. 0 to +180 degrees and sudden transition to -179 and goes to 0 in the reverse direction.

The problem I am facing is this transition around the boundary from +180 to -179. If my target angle is say 170 degrees, once it nears 170 degrees the servo speed reduces and when it reaches 170, the velocity becomes zero to a standstill. Having the same 'Target angle' if the orientation of board is such that yaw output is 180 and then a slight change in orientation cause a sudden change to -179 (This is a difference of almost 180 - (-179) ~= 360). The servo speed reverses from relatively slow to fast, due to this vast difference to compensate.

Is there a workaround? or a method to compensate for this problem? This is not there in the code. Any help is appreciated...

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