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HelicopterRadio - Servo - Gyro - Gov - Batt › Maximum servo travel??
04-30-2004 10:41 AM  13 years agoPost 1
captain1

rrApprentice

Sydney - Australia

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Can anyone here enlighten me?

I have as NES-810g on my tail and I was checking the end points the other day and found something really strange. I have my radio setup with 150% travel on the rudder. Now with the gyro in non heading hold mode, when i move the rudder stick the servo stops travelling before the stick has moved more than half of it's travel. If I put the ATV down to 100% and try the same, the servo stops moving when I get to about 3/4 of the rudder stick travel. I assume that the serove has reaced the end of it's travel and will no longer accept and more input from the receiver.

I tried this with the gyro removed and it is the same.

What travel should I expect from this servo? It seems like a lot less that a standard servo. Looks like I might need a longer arm on this one to get full rudder deflection.

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04-30-2004 10:46 AM  13 years agoPost 2
pepper

rrVeteran

GREAT STATE OF TEXAS!!

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try either a longer arm or recentering your servo.

pull the arm, set the radio at 100 left and right, and then turn all power on. then set your servo arm at 90 deg. also make sure you don't have any trim set in.
you will also have to reset your gyro travel limits. what gyro are you useing?

pepper
GOD BLESS

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04-30-2004 11:03 AM  13 years agoPost 3
comet

rrVeteran

Neuilly sur Seine, Fr

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I ve already experienced this kind of thing; this is I get complete servo travel with less than 100% ATV.

I set the ATV so that I get full travel only at full stick.

Now, depending on the gyro you are using, ATV will set up the pyro rate, and the travel of servo is adjusted on the gyro by setting the travel pot. on this gyro.
Usually, travel adjustlment on gyro is done in order not to get any binding of the rod with full pîtch control of tail rotor.


You want to look at max travel of the servo (without the gyro), than find the proper hole on horn so that you get the tail rotor pitch control within this max travel. I would than plug in the gyro and try to restore this servo amx travel using the travel pot on the gyro (be aware of binding, but you want full pitch control of your tail rotor)

Hope this helps

VT "slow&low"

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04-30-2004 02:40 PM  13 years agoPost 4
captain1

rrApprentice

Sydney - Australia

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I already am in the process of moving the ball link out a hole. And I am also aware that the radio ATV will control the piro rate with a heading hold gyro (that is why i have it set up at 150% and it is also why I did this test using rate made and also with no gyro).

The question however was not what I should do, but rather what is the maximum travel for a servo?? Is it 60 degrees either side of neutral or am I confusing that number?

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04-30-2004 05:31 PM  13 years agoPost 5
comet

rrVeteran

Neuilly sur Seine, Fr

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it depends on servos, but 60° either side is a reasonnable figure.

VT "slow&low"

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HelicopterRadio - Servo - Gyro - Gov - Batt › Maximum servo travel??
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