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| Electronics Discuss radios, chargers, etc... |
Topic Review (Newest First)
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| 10-13-2014 09:48 AM | ||
| bigkim100 |
Re: Jittery servo(s) - HELP If you are certain that the battery supply is correct, and that it can supply the amperage required, I would also try a Electrolytic capacitor across one of the supply pins of the receiver. 1000uf at 12 volts is plenty, 450uf at 12v is minimum. I have a unit that gets Gyittery as well, as soon as I added the Cap...all was well. |
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| 09-17-2014 07:45 PM | ||
| machzx |
Re: Jittery servo(s) - HELP Quote:
hammer time not sure if its worth ending it in |
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| 09-17-2014 03:08 PM | ||
| Flyerpete |
Re: Jittery servo(s) - HELP Hi Mike, I am just telling you what has happened to me. My A123 batteries do not drop down to 3.3 for quite a while after coming off the charger. Send the jittery servos back for testing. It might be interesting to know if they are damaged. |
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| 09-17-2014 04:42 AM | ||
| hitechflyer |
Re: Jittery servo(s) - HELP If the gears are worn jittering will start, when the gears develop play it makes the digital servo hunt, referred as jittering. |
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| 09-17-2014 12:29 AM | ||
| MikeCam |
Re: Jittery servo(s) - HELP Life charges up to 7.2 (2 cell) but will drop down to 3.3 volts per cell after taking off the charger. I have 645's on life, 7955's on life, heck cheap Futaba 3004 on life and not one issue with any servo in 4 years. No reg's either. As they say, individual mileage will very. I wonder if radio choice makes any difference. Futaba user. |
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| 09-16-2014 08:36 PM | ||
| Flyerpete |
Re: Jittery servo(s) - HELP I had the same problem running life(A123) batteries on Hitec 645's. A fully charge A123 is 7.2 volts...too much, even though Hitec themselves told me it was no problem. I finally talked to someone would knew his stuff, a member of team Horizon. Keep an eye on your servos because the problem will return, it will work for a while. I got almost a whole season out of them before they started acting up. I didn't want to spend the money to replace all my servos with high voltage servos, so I put in a regulator...end of problem. I had 5 servos go in 1 plane. Sent them back to Hitec and they told me 2 boards were fried and 2 were melted from overvoltage. They repaired 2 and replaced 2. This is the first plane that I have used A123 batteries. You can go on youtube and see many videos of jittery servos...just do a search. I hope this helps and good luck.....Peter |
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| 09-16-2014 07:51 PM | ||
| planecrazyisme |
Re: Jittery servo(s) - HELP Swapped my digital rudder servo(s) with an analogue Hitec 645MG servo. Problem solved. Jitters gone Thanks Frank |
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| 09-16-2014 07:48 PM | ||
| machzx |
Re: Jittery servo(s) - HELP all fixed |
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| 09-09-2014 06:08 PM | ||
| hitechflyer |
Re: Jittery servo(s) - HELP Iv'e had servos jumping for three different reasons. The easiest fix is the pull pull cables are bouncing and are making the servos go into a hunting frenzy. easy fix, make a support half way down the cables. I used a foam block, glued to the fuse thick enough to rub under the cables and velcro over top. There are a couple of Hitec's that don't like to be paired up on a Y harnes. I think one of them is 5955's Use two channels to fix. And if that doesn't help, U need a in line signal booster, worked for me and these were the all mighty Hitec 7990's Futaba has a low signal voltage, your best bet use Savox |
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| 09-09-2014 05:22 PM | ||
| itizme |
Re: Jittery servo(s) - HELP In Ed's case it is the servo, it even jumps while moving, extremely violent. Hi volt servo on a lipo and same servos on other flight surfaces. As original poster stated PULL PULL- that is always the common factor and in most cases the Velcro is a fix ( I have only one pull pull with two 8711's, it has the Velcro fix and that works fine).Can anyone explain how the cables effect the servo? I do not feel static tension is the issue but perhaps it is that tension is lost on one side because of poor installation design? |
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