servo buzzing

[scotty5591]

hello, i was just wanting to know if servo buzzing is normal for non digital servos, there all centered and ive also adjusted the links a little but there is still sometimes some slight buzzing, do you think this will do any harm to the servos or battery life? there s3003's
thanks
scott

[SlamDunK]

Scott, it's normal for some servos to buzz when trying to maintain position, I find the analogues buzz more than the digitals (maybe my setups are weird).
if it's bothering you take the linkage off the offending servo, it shouldn't buzz, then check the movement of the arm it's connected to (pitch / aileron etc)
If you find these a bit stiff loosen them up as best you can, including making sure the swash and all associated arms and rods right through to the blade grips aren't binding, this'll ensure the servo isn't fighting a tight spot.
Theres not much more you can do, I don't have any experience with 3003's so don't know if they're more prone to chatter than others.

One of my 90's has a buzz on the pitch arm, sometimes it's there, sometimes it's quiet, I just learned to live with it after checking all the above.
I doubt it will have a detrimental affect on battery life unless you leave it on for extended periods.

Duncan.

[scotty5591]

thanks

hi duncan, many thanks for the info and looks like ill just have to live with it, thanks again scott

[Cralis]

Slam and scotty - I find the opposite to the buzzing. I find my digitals buzz way more than my normal ones... On my Trex, only my tail servo buzzes. It's the only digital on there. And on my Raptor, I have all round digital, and when I power it up, they all make a racquet.....

[simon_s]

I agree with Cralis about the buzzing. Analog servos usually only buzz if they are binding, this uses more power as the servo is straining.

[SlamDunK]

No problem Scott.
I just looked at the offending servo of mine and it's digital. My bad.
The difference is cheapy servos vs BLS451's, I have these on the V-Max and they don't chatter.
I suppose it's down to the sensitivity and centering ability of the servo and how much weight or friction they're dealing with.
If the linkage is stiff it'll fight it. If the linkage is loose it'll have to support the weight of the components trying to succumb to gravity.
Also, with the Raptor in standard form and the radial nature of servo movement the forces will change throught the range of travel. Push/pull is far superior IMO for this reason (among others).

Duncan.