Re: Question: Servo noise.

I think that it probablly is a case of the pushrod binding inside the
plastic tube. It seems to be much more difficult to move then the other
pushrods are. As also mentioned, moving it will not be a very easy task
because the fuselage did come all pre-built. Without doing major surgery I
don't know what to do. I tried spraying WD40 down the pushrod even but it
didn't seem to loosen anything up.

Thanks for the tips,
Jeremy


"Darnell" <bdarnell1966@xxxxxxxxxxx> wrote in message
news:wtOdnZ2dnZ0SBXvcnZ2dnU3Tid6dnZ2dRVn-z52dnZ0@xxxxxxxxxxxxxx
> While I totally agree with the fixes mentioned here, I have found that
> sometimes you just cant get servos to shut up. I have flown planes with
> mildly buzzing servos for years with never a problem to my knowledge. Now
> do
> not get me wrong if it can be fixed then by all means repair it. Most
> planes
> that I have built had the pushrods glued into a certain place long before
> the radio was even installed so moving that is not always an option.
> Anyways
> I do not think your servo buzzing is going to be detrimental to the plane
> as
> long as it is not severe and with you description it does not sound that
> way.
> Brad
> "Ted Campanelli" <tcamp@xxxxxxxxxxxxxxxx> wrote in message
> news:uaLQe.738$v83.400@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>> Ted shuffled out of his cave and grunted these great (and sometimes not
>> so great) words of knowledge:
>>
>> It sounds like you MAY have either a binding OR tension on the pushrod
>> to the rudder.
>>
>> The first thing you want to do is swap the servo with a different one to
>> see it the problem persists. On very rare occasions you will get a bad
>> servo right out of the box.
>>
>> If the servo is still chattering (and the battery is fully charged ) do
>> the following:
>>
>> Does the pushrod move freely (no resistance - you should be able to move
>> it with a slight motion of your finger tip ) in the guide tube without
>> the rudder attached ?
>>
>> If it moves freely, check the rudder and make sure the rudder moves
>> freely (rudder hinges improperly aligned and/or CA in the hinge joint
>> can cause the rudder to bind ). The rudder should only require about 2
>> or 3 times (maximum) the amount of force to move the push rod.
>>
>> Now connect the pushrod to the rudder and see if everything still moves
>> freely. If it doesn't, the angle of the pushrod where it exits the
>> fuselage will need to be changed.
>>
>> If everything is still moving freely, check the angle of the pushrod to
>> the servo arm. Is the pushrod and the servo arm at the same angle ? If
>> the angle is not the same, the pushrod inside the guide tube is binding
>> up. You will either need to move the guide tube or the servo to get
>> them both at the same angle. If you move the servo, be careful you do
>> not cause the same problem with the nose gear.
>>
>> If none of these work, check the information that Alan provided. He is
>> a very knowledgeable person and has a web site that can usually answer
>> any question/problem you may have.
>>
>> > Ok...so I'm starting to go insane! I'm trying to build a 4 channel
> trainer.
>> > I've got everything finished except for the rudder / front wheel servo.
>> > Something is wrong with the rudder portion. The servo, without
>> > anything
>> > hooked up to it works fine. It's nice and smooth and doesn't make any
> noise.
>> > If I attach the control for the front wheel, it still works fine. But
> the
>> > second I try to put the rudder on it starts chattering away. Sometimes
> I
>> > can get it to be quiet when centered, but as soon as I give it any
>> > input
> it
>> > starts making the noise. I've heard about it having to try to hard, or
>> > exceeding its maximum travel limits etc. I can't seem to figure it
>> > out.
>> > I've tried using all the different holes in the control arms at both
> ends
>> > and I still can't seem to get it right. Now I'm even trying different
>> > attachments at the servo, like a clip instead of just a Z-bend etc.
> It's
>> > driving me nuts! Help.
>> >
>> > Jeremy
>> >
>> >
>
>


.

Relevant Pages

  • Re: Question: Servo noise.
    ... It sounds like you MAY have either a binding OR tension on the pushrod to the rudder. ... The first thing you want to do is swap the servo with a different one to see it the problem persists. ... the angle of the pushrod where it exits the fuselage will need to be changed. ...
    (rec.models.rc.air)
  • Re: Pushrod Woes
    ... it doesn't matter where the pushrod (housing) goes in between. ... a little longer if you put that piece of metal rod in it that the ... and then aligning the servo output and the control horn ...
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  • Re: Question: Servo noise.
    ... If it is the tube the pushrod is in, chances are the tube is secured where it exits the fuselage at the tail and on a former near the servo tray only - most ARFS are secured this way. ... it with a slight motion of your finger tip) in the guide tube without the rudder attached? ...
    (rec.models.rc.air)
  • Re: Question: Servo noise.
    ... I do not think your servo buzzing is going to be detrimental to the plane as ... > to the rudder. ... > Does the pushrod move freely (no resistance - you should be able to move ... the angle of the pushrod where it exits the ...
    (rec.models.rc.air)
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