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Author Topic: Graupner c 677 servo making random movements  (Read 955 times)

westcoaster

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Graupner c 677 servo making random movements
« on: February 02, 2022, 04:48:54 pm »

Hi all, I have an old Graupner servo which randomly turns without any stick movement from the Tx. There doesnt seem to be a pattern to it. The servo operates normally when the stick is moved.
What do you think this might be ? Am I as well to just recycle it ?
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essex2visuvesi

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Re: Graupner c 677 servo making random movements
« Reply #1 on: February 02, 2022, 05:50:18 pm »

do you mean like a random twitch? If so you might nead to pop it open and give the pots a quick clean with some contact cleaner
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Umi_Ryuzuki

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Re: Graupner c 677 servo making random movements
« Reply #2 on: February 02, 2022, 06:43:35 pm »

If you are using more than three servos and an esc in the model, it could be low power.
BEC sometimes can not supply enough amperage if there are a lot of functions.
 
A way to sleuth that issue is to turn off the BEC switch and connect a reciever battery to
the reciever and check of the twitch goes away.

unbuiltnautilus

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Re: Graupner c 677 servo making random movements
« Reply #3 on: February 02, 2022, 11:22:04 pm »

Funny that, had a C677 do something very similar in November. It just started sweeping left to right with no command inputs. Filed it under 'recycling'!
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westcoaster

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Re: Graupner c 677 servo making random movements
« Reply #4 on: February 05, 2022, 11:53:26 am »

Thanks for your helpful suggestions, unfortunately, having eliminated both possibilities there are still "rogue" movements happening so it's now recycled
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Shipmate60

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Re: Graupner c 677 servo making random movements
« Reply #5 on: February 05, 2022, 03:12:25 pm »

Radar Motor?


Bob
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unbuiltnautilus

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Re: Graupner c 677 servo making random movements
« Reply #6 on: February 05, 2022, 07:54:55 pm »

Radar Motor?


Bob


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