Servo Dead Band.... was Rudder pull/pull

[Rcmaster199 at aol.com]

Although I never really had the quick oscillations happen to one of my WORN 
servos, it has happened a couple times on brand new 8411's, one on rudder and 
the other on aileron in a large sa  model
. The fix was to loosen the dead band a little, at least that's what  the 
technician at Horizon said. 

Tony Stillman had suggested to me that the pot was no good. Even new servos 
can have bad pots

mattk
. 

> Subj:Re: Rudder pull/pull 
> Date:11/30/2003 5:32:53 AM Eastern Standard Time
> From:<A HREF="mailto:jbudd at QNET.COM">jbudd at QNET.COM</A>
> Reply-to:<A HREF="mailto:discussion at nsrca.org">discussion at nsrca.org</A>
> To:<A HREF="mailto:discussion at nsrca.org">discussion at nsrca.org</A>
> Sent from the Internet 
> 
> 
> 
> >I took Tom's suggestion and tightened up the cables a bit and it 
> >seemed to help but not totally eliminate it.  This servo does have a 
> >little slop in the gear train as it has a gazillion miles on it.
> 
> 
> Clay,
> 
> The gazillion miles comment gave it away - your pot is almost 
> certainly worn out (and maybe the gears too).  I've had this happen 
> on rudder servos , elevator servos, and aileron servos.  Is it safe 
> to fly?  Probably.  Would I fly it this way?  No way.  What's the 
> point, it'll fly like crap until you fix or replace it.
> 
> Jerry

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