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Old Feb 02, 2013, 12:06 PM
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United States, MN, Minneapolis
Joined Nov 2011
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Originally Posted by ryyoungs View Post
I have a JR ds3421 servo on the elevator of 60" extra that will jitter when I hold it steady at any given point, but doesn't do it all the time and not always at the same position. This is on the bench and not under load. I never noticed it before, I've only had the plane for 2 months with 15 flights on it, and am wondering if this is normal and once under load it will be fine?
Digital servos jitter. I am not sure about your experience, so if you have not used digital servos before, I'd make a video to illustrate the problem either to JR/horizon, or for us--there can be too much jitter.

Also, what ESC/BEC or battery are you using? If you're using servo extensions, what is the gauge of the wire compared to the wire coming out of the servo. I've not witnessed this, but I have heard that noisy power from a BEC can cause jitter too.

Also, try it on a different channel...jitter could come from a pot in your transmitter. If your transmitter has a monitor function, take a look. Also make sure you don't have expo in the wrong direction. Also search around youtube....some peole have reported that a different servo can induce noise on other servos, leading the other good servos to jitter. For example, see this demo. It might help you trouble shoot your setup.
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