RealViking

My Feedback: (5)

I am having a problem with my Futaba 9252 digital servos on my Funtana X100.
After movement they will oscillate around their home position (quite a bit, Aileron will move 1/2").
Both aileron are the same, I tested the elevator servos to with same result. All cabling is heavy duty and routing is good.
All hardware is top notch with ball links and Dubro control horns. There is no drag at all; The aileron will fall down when power is off.
By creating some drag (Installed an O ring between servo case and control horn) it works good.
Looks like a servo gain or dead band problem to me.
Different receiver was tested with same result.
Please guide me.

Bax

My Feedback: (11)

You need to check how clean your connectors are, and the quality of your extensions. Long extensions with less-than-excellent connections can cause the oscillation. If you try plugging the servos directly into the receiver and get no oscillation, then you know it's not a servo, but the long connection to it.

RealViking

My Feedback: (5)

Thanks for your fast reply,
The extensions are Futabas heavy duty and its all brand new, Same problems with both ailerons.
Elevator works much better and if I swop the servos between elevator and aileron I have the same problem.

crive

Same for me... same servo, same pathology...

Directly wired to the receiver, on a 60 size helicopter.

Started on one of the three installed, (replaced) and now is extending on the other two...

Seems like potentiometer syndrom... and the problem seems more likely to happen near the neutral of the servo...

Worn servos ?
Is 20 hours work time enough to get them replaced ?

Any help? Suggestions ?

Bax

My Feedback: (11)

If you connect the servo directly to the receiver with no extension and you still get the problem, then you have a servo with difficulties. It could be a bad potentiometer, gears with excess play, and so on.