Servo's Hummmmmming

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Servo's Hummmmmming

PostPosted: Tue Aug 08, 2017 10:46 pm

I've got a humming LamYak! I'm running an orange receiver powered through a Castle Creation Talon 90 amp ESC for a G32. I've got two 3600 2S battery packs powering 4 Solar 770's. I'm running "Acro" on a Futaba 8U transmitter and fail safe isn't even an option. It states to make sure it's OFF when using the Orange TX FASST receiver. I can't figure out what is going on and might have to swap out and try it with an FM frequency? Any ideas or suggestions? I soldered a two into harness and thought it might be causing the problem and switched it with another one and I still get the hum? I tried a different RX and it didn't go away. Tried some other servo's on the same RX without the Talon or G32 and there was no hum?

Help!
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Re: Servo's Hummmmmming

PostPosted: Tue Aug 08, 2017 11:22 pm

Is the Orange FASST receiver running high speed mode? Or slow speed mode?
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Re: Servo's Hummmmmming

PostPosted: Tue Aug 08, 2017 11:47 pm

Wow! I didn't know there was an option? How would I tell?

******* ************ **********

Found some instructions on how to set it to fast or slow. I'll try switching it and see if that impacts the humming!

Thanks for the suggestion!!
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Re: Servo's Hummmmmming

PostPosted: Wed Aug 09, 2017 12:30 am

So I've switched it back and forth between the fast or slow based on the speed of the blinking light and it hums in either setting. Servo's work, it's just loud! :(
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Re: Servo's Hummmmmming

PostPosted: Wed Aug 09, 2017 7:24 am

Nothing but problems with the solar 770's and 771's that Ive had. Not saying thats your problem but.... I wouldn't use them if someone gave them to me new
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Re: Servo's Hummmmmming

PostPosted: Wed Aug 09, 2017 8:41 am

Unhook your linkage or take the servo horns off. If it still hums, you have something binding.
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Re: Servo's Hummmmmming

PostPosted: Wed Aug 09, 2017 8:44 am

Ve never had issues with my 770s but they are noisey
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Re: Servo's Hummmmmming

PostPosted: Wed Aug 09, 2017 9:07 am

When they actually break out in song, then you have something to worry about.


Sorry I couldn't be of more help.
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Re: Servo's Hummmmmming

PostPosted: Wed Aug 09, 2017 10:38 am

When I first booted and bound the transmitter I didn't have any of the linkages attached. I was just trying to center them before I started cutting the wire to length. It didn't seem to change once I connected them. It's so loud and it resonates through the Monokote. Everything seems to work, but who wants to fly a tone def yak?? :shock:

This is my first attempt with digital servos and I thought maybe the Orange RX wasn't compatible. Would low voltage or a bad connection cause the humming?
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Re: Servo's Hummmmmming

PostPosted: Wed Aug 09, 2017 11:05 am

If you want a good experience with digitals, go Savox. 1251MG's are great for 40-50 size surfaces.
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Re: Servo's Hummmmmming

PostPosted: Wed Aug 09, 2017 11:14 am

Loud humming with digital servos is nearly always caused by the servo not quite being able to reach it's commanded position. With no linkages attached, the servo doesn't have a problem reaching the commanded position, so the hum is minimal.

With the linkages connected, try plugging in the servos one at a time. This will identify which servos are humming the worst, and which linkages are stiff enough to keep the servo from reaching the commanded position.
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Re: Servo's Hummmmmming

PostPosted: Wed Aug 09, 2017 3:41 pm

Sometimes just the weight of a control surface will cause a digital servo to hum. Try having just one aileron plugged in. If it hums, gently lift the control surface a bit to see if the humming goes away. Typically this type of hum isn't very loud.
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Re: Servo's Hummmmmming

PostPosted: Thu Aug 10, 2017 1:03 am

I'll try one servo tomorrow and then see if I can figure out what's going on. As I mentioned, they all hummed when I originally bound the RX. I didn't have ANY linkages on at that point, but maybe that was because my RX was set to Analog too?
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Re: Servo's Hummmmmming

PostPosted: Thu Aug 10, 2017 2:35 am

dhooks wrote:Ve never had issues with my 770s but they are noisey



This ^^^


I've put mine through hell in my glitter and jo60 and have some in my whorehawk and 771's and 772's in my fusion. Not a problem with any of them but some buzz a little on the ground. Lay a rag or my finger on the surface and they stop.
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Re: Servo's Hummmmmming

PostPosted: Thu Aug 10, 2017 6:19 am

maybe they just don't know the words?



or the ailerons are so small, the servos don't know what to do?



sorry, just having fun! hope you like flying the lammy. buy some cheap hk servos like i use, and no worries! there's several i've found that are good on 40 and 20cc sizes. if you wanna try them, i can post links.
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Re: Servo's Hummmmmming

PostPosted: Thu Aug 10, 2017 6:22 am

WoodPilot wrote:
dhooks wrote:Ve never had issues with my 770s but they are noisey



This ^^^


I've put mine through hell in my glitter and jo60 and have some in my whorehawk and 771's and 772's in my fusion. Not a problem with any of them but some buzz a little on the ground. Lay a rag or my finger on the surface and they stop.


you mean either a rag or a finger is what it takes to stop them from whining? hmmm...i aint touching that one! :shock:
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Re: Servo's Hummmmmming

PostPosted: Thu Aug 10, 2017 7:15 am

I'm saying any light pressure will stop mine from buzzing like digitals tend to do.
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Re: Servo's Hummmmmming

PostPosted: Thu Aug 10, 2017 8:09 am

WoodPilot wrote:I'm saying any light pressure will stop mine from buzzing like digitals tend to do.


so light pressure in the right place makes them happy?
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Re: Servo's Hummmmmming

PostPosted: Thu Aug 10, 2017 5:21 pm

Well, they are Chinese
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Re: Servo's Hummmmmming

PostPosted: Thu Aug 10, 2017 5:25 pm

Drop em in your underwear, and order new. Problem solved, soiled undergarments.
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