Servo oscillation help

[Troy A. Newman]

Bad or poor quality servo extension lead will cause this too. A Heavy
control surface can cause it as well. Although that servo is the not most
precise I would not think it would be fighting itself to find center. A
higher precision servo could show this sign as they are very accurate around
center. Not saying to replace the servo just saying that lots of things can
cause this and saying that the servo deadband being too tight is probably
not one of those things on that servo....The reason being is those servos
are not super digital precision....

I would replace the extension leads and se if that solves it! I have found
similar stuff with aftermarket leads. Several companies are selling them
pretty cheap and I have found that many cases they just are not up to snuff.
I choose only JR gold HD extensions. Even in Jenny's trainer I swapped out
the extension for Ailerons to a HD gold version.


Troy Newman
Team JR
----- Original Message ----- 
From: "Tom Simes" <nsrca at shinymetalass.com>
To: <discussion at nsrca.org>
Sent: Thursday, January 27, 2005 10:26 AM
Subject: Servo oscillation help


>
> I've got a problem with an aileron servo that I'm hoping the collective
> wisdom here knows an easy remedy for.  On one of my ailerons about one
> in three times when the surface is at neutral if I pluck the aileron or
> let the stick bang back to center, the servo will go into oscillation.
> A very light pressure or slight stick displacement will stop it, and it
> only occurs when the servo is at center.  As far as I can tell it's
> not happening in flight (my guess is the aerodynamic forces are
> dampening it).  The first time I noticed it, I immediately thought the
> pot had a problem around it's center point so I swapped in a brand new
> servo (same type, Futaba 3004). To my surprise the new servo acted
> exactly the same way, so that lead me to believe the problem is not with
> the servos.  Now my guess is I've somehow perfectly balanced the
> mechanical linkage resistance to the servo's startup force.
>
> At this point I'm thinking about sealing the aileron gap in hopes of
> changing the mechanical resistance a smidge.  Has anyone else seen or
> solved this problem?
>
> Thanks!
>
> -- 
> Tom
>
> _____________________________________________________________________
>
>        |  ,  |               Tom Simes
> ---------(@)---------        AMA 230068
>         --|--                NSRCA 3830
>           '                  nsrca at shinymetalass.com
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