Digital Servo Singing

[davel322 at comcast.net]

....and......

if you can put an ammeter inline, see what the servo is drawing at idle (with nothing attached) and compared the idle current to other similar servos - if it is substantially different, change it.  I am not too familiar with the Hitecs, so I can't volunteer specific numbers.

Dave Lockhart
DaveL322 at comcast.net.
> digital servos are very good at finding center...and holding it 
> there....This takes some power to do it...The hum that you hear with 
> digitals is common....
> 
> I would suspect its OK...I don't know much about the Hitecs...but try a 
> little subtrim or trim and you should be able to get the servo to 
> stop.....Usually the weight of the surface is enough to get a little whine 
> out a digital servo. But with all linkage disconnected...I would think you 
> should be able to get it stop.
> 
> I would not be overly concerned...maybe the gear train is a little too tight 
> or another option is perhaps when you have bolted down in the servo mounts 
> its not straight and the case is slightly tweaked....I know this sounds 
> funny but I have seen it happen. Loosen the servo mounting screw a little 
> and see if it stops...then slowly tighten in an opposing pattern...till the 
> servo is snug. DO this while the radio gear is turned on and you can find 
> out if it stops the buzzzzzzz
> 

> Another option...perhaps you Pot is worn an is send a changing signal....Say 
> step 1024 and 1023 and the and the servo is fighting itself to get in 
> between...to check for this try another channel on the RX...usually a 
> throttle...as the throttle TX pot doesn't get worn at center....
> 
> But I think you may be OK...these are just precautions...and I bet you'll 
> find it....If it is one of these two little things...not too much to worry 
> about.
> 
> TX pots can be serviced...and the servo mounting twist can be fixed easy....
> 
> 
> >From: "Keith Hoard" <khoard at midsouth.rr.com>
> >Reply-To: discussion at nsrca.org
> >To: "NSRCA Mailing List" <discussion at nsrca.org>
> >Subject: Digital Servo Singing
> >Date: Sun, 16 Nov 2003 21:39:39 -0600
> >
> >Guys,
> >
> >     I've just installed my first digital servos. . . Hitec's.  One of them 
> >"sings" continuously even when it is not under any load.  Is this normal??  
> >I'm using a 4-cell 1200Mah Nicd pack (if that makes a difference).  
> >Thanks!!
> >
> >
> >Keith L. Hoard

> >Cordova, TN
> >khoard at midsouth.rr.com
> >
> 
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