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-   -   jittery servos (https://www.rcuniverse.com/forum/beginners-85/6605494-jittery-servos.html)

ccab17 11-10-2007 02:25 PM

jittery servos
 
Ok, question here. All over my servos work correctly. However, when the receiver and transmitter are both turned on and a few mintues later, if i move my transmitter around almost like i am turning circles myself (without touching any of the controls) the servos get jittery. I hear them jitter within the fuse. I do not see the ailreons, rudder, elevator or throttle move, I just hear the servos jitter. It this a major problem? Maybe with my transmitter? please help. If you need more information about something just ask. thanks!

seemefly_1 11-10-2007 02:30 PM

RE: jittery servos
 
was your attena fully extended? when it isn't it normaly makes them jitter

ccab17 11-10-2007 02:32 PM

RE: jittery servos
 
fully extended.

ccab17 11-10-2007 02:35 PM

RE: jittery servos
 
It seems like if i point my antenna in a certain direction they will get more jumpy. Then another direction they wont be at all. There are a few directions in which they get more jumpy than other directions. Most directions that i point it, they dont get jittery at all

w8ye 11-10-2007 02:52 PM

RE: jittery servos
 
The weakest signal is generally when you point the antenna directly at or away from the plane. To hold the antenna at a right angle to the plane is generally the strongest signal.

jetmech05 11-10-2007 04:18 PM

RE: jittery servos
 
if you're that close you're probably over driving the receiver...keep your antenna down and get about 15 ft away..see if it stops..if so a range check should be done close your antenna and walk....you should get 75 to 100 ft away before the control surface gets jumpy..stop and extend the antenna ...normal control should resume

OzMo 11-10-2007 05:39 PM

RE: jittery servos
 
yup,
Another term for just what jetmech05 said is "swamping" to much signal for the rx do to the antenae being to close.

vmsguy 11-10-2007 10:17 PM

RE: jittery servos
 
The servos on my plane were jumping too. Just the rudder servo actually. I decided to "live with it."

Then I broke the front wheel off my landing gear, and I decided to redo my control rods and make it steer better. Once I finished all my work, I removed some binding on the control rod. Not much, but still some. Once I did that. The jitters went away.

Simple test, remove the control rod connection to the servos. THen turn everything on. See what happens.

Good luck.


tIANci 11-10-2007 11:49 PM

RE: jittery servos
 
One of my aileron servos had the jitters, I did not look into the cause. I lost my plane, one of the wires on the PCB were loose. Also,some JR digital servos get the jitters after a while because the servo is fighting to find its centre. Seen some servoes start to waive (yes it was waving up and down on its own!) and this was because of a bad extension.


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