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[DPRG] Maximum voltage on hobby servos

Subject: [DPRG] Maximum voltage on hobby servos
From: Patrick Innes kc5ugq at yahoo.com
Date: Mon May 29 22:43:55 CDT 2000


I used to race R/C trucks, but never actually got
around to measuring and seeing if the voltage supplied
by the speed control unit was actually 6 volts, or
just the 7.2 passed on through (I know -- Bad techie! 
No cookie!).  Should probably do that some time.

Anyways, I would also think that running at a higher
voltage would tend to induce jitter and/or "buzz" into
the servo's output, since any adjustments it would try
to make would be made faster (they're designed around
hitting a target position smoothly at 5 volts), and
they might tend to overshoot and have to backtrack.

Just a thought.  No real data to back this up, etc.

-- Patrick

--- Dennis Draheim <ddra at airmail.net> wrote:
> Jeffrey,
> I've run HiTec brand servos on 7.2v with no apparent
> problems.  I don't
> know about the Futabas though.  In any case, it
> probably shortens the
> life of the servo a bit...
> Dennis
[ snip ]
> > On the Futaba 'data sheet', back of package, they
> just list operation
> > at 4 or 6 volts, no maximum voltage given.  Has
> anyone run these
> > servo's at 7.2V?  Three sets of (4 AA nicads in
> series - 4.8V) could
> > be fit into the same space.  I would prefer to use
> the 7.2V pack due
> > to availability and capacity.  Any ideas?
> > 
> > Jeff Birt
> > Halfway, Missouri

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