papabearflying
Never experienced this one, one servo on an aileron goes down fine but when it goes up it flutters like mad sort of "machine gun style" never seen anything like that before?
It´s a nylon gear servo, so what says you all, a nylon cog has slipped out? or teeth are broken? is it ready for the garbage? it was a cheapo. Thanks.
Never give up on something you can´t go a day without thinking about!
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1morecrash
yea its stripped, it'll happen every once in a while
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papabearflying
Thanks for that, now I know what I´ll be doing tonight
Never give up on something you can´t go a day without thinking about!
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LukeWarm
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Never experienced this one, one servo on an aileron goes down fine but when it goes up it flutters like mad sort of "machine gun style" never seen anything like that before?

There are many different reasons why some servos glitch:

    • Some have mediocre shielding that give poor protection from electrical noise.
    • Never route any cables (like servo wires) right next to the motor.
    • A poor electrical connection.
    • Too long or improper cables.
    • The servo is electronically or mechanically worn out or broken.
    • Compatibility issues; Not everything works well with everything.
    • Mechanical binding anywhere in that servo's system.


Mechanically worn out or broken:

    • A gear or two in the servo is stripped (Missing or worn teeth),
    • A gear shaft is broken or badly worn,
    • A bearing, bushing, or pivit hole is broken or badly worn.

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1morecrash
Quote:

There are many different reasons why some servos glitch:

    • Some have mediocre shielding that give poor protection from electrical noise.
    • Never route any cables (like servo wires) right next to the motor.
    • A poor electrical connection.
    • Too long or improper cables.
    • The servo is electronically or mechanically worn out.
    • Compatibility issues; Not everything works well with everything.
    • Mechanical binding anywhere in that servo's system.




or its stripped...
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LukeWarm
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or its stripped...

I did not specifically call it stripped, but I think stripped falls with-in these two.

    • The servo is mechanically worn out.
    • Mechanical binding anywhere in that servo's system.


Yes, the servo being stripped would cause that problem !!!! To be clear, I will add it to my list !!!
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papabearflying
I took the servo out, when I moved the arm it made a sound like it has accute arthritis, i.e. grinding bones, so it was stripped for sure. Thanks for all your input.
Never give up on something you can´t go a day without thinking about!
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LukeWarm
1morecrash nailed it. Alright, Good going !!!!

I thought you were probably right, but there are a lot of mechanical things that can go wrong inside a servo. A gear being stripped may be a symptom of the problem. Once, I put new gear in a servo and it only lasted a couple of runs; I found the pivot hole for the primary gear was badly worn and it did not support the gear very well. From then on, I always check everything inside the servo to see if it is worth repairing. If I repair a servo, I also clean it and re lubricate it.

If the servo turned out to be mechanical sound, it is nice to have a list so you can go forward to trouble shoot from there.
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colorc
then there is the rare malfunctioning potentiometer. wasted my time putting new gears in to finally figure out it wasnt the gears.
Nothing said I had to crash
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CrashJones
I'm getting this flutter too. I have 6 of the same brand and model servos, the only ones to flutter are the elevator servos. Never both of them, one started doing this so I replaced it and then the other one did it. Then I read Luke's post and took the first servo I removed and took it somewhere else in the house and it worked fine. I've switched receivers, ESC and different wire lengths and setups. I hooked up only the one servo that has flutter in different places inside/outside and it still does it. I'm at a complete loss here.

Please help, first nice week of the year in Seattle and need to make use of it!

Thank you!
What goes up must come down.....but why so hard?
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colorc
If it is the rc timer servos, they just seem to have issues. The 5 that I bought have not been too reliable. There are only 2 that still work whilst the others have developed that machine gun like flutter. I never crashed with them in, and 1 did it brand new out of the box. O well.
Nothing said I had to crash
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