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Old 06-05-2007 | 09:02 PM
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From: Conway, SC
Default servo chatter/spastic

I have been putting together an ARF Edge540T... when I went to do the electronics and started testing them I would get some wild/spastic past dual rates servo chatter... it would occur off and on when I would touch the rx battery pack... my tx battery was low so I charged it up.. seemed to fix it then tonight I got some of it again... Im building in my shop with many tools etc.. around some on the table very near where my tx and antenna tail was... moved it all and it seemed to fix..... could the low tx battery / lots of metal near tx & antenna have caused this?? Im using Futaba 7cap tx / 4.8 vlt bat. 1200mah
Old 06-05-2007 | 10:01 PM
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From: Raeford, NC
Default RE: servo chatter/spastic

You really need to take the gear outside, fully charged, and range test it properly. Eliminate all the variables and see what you have.
Old 06-05-2007 | 10:04 PM
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Default RE: servo chatter/spastic

Low battery may have contributed but more likely you were simply too close and swamping the RX with too much power. Collapse TX antenna completely and try to keep TX at least 4 feet away from the RX antenna. Do not leave TX on for very long as this may overheat the TX. For a short period (5 minutes or so) it will be fine.
Old 06-05-2007 | 10:53 PM
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Default RE: servo chatter/spastic

Touching a screw driver to the idle jet is enough to drive my plane nuts with the transmitter closer thant the four foot. I was flying the other day and noticed I only had the antenna out one section. I was flying way out and still had control, until I about lost the plane trying to pull the antenna up. So if the receiver can handle that little of a signal, imagine what it thinks when you holler in it's ear.

Don
Old 06-06-2007 | 04:40 AM
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From: Jacksonville, FL
Default RE: servo chatter/spastic

I always got a little flutter when i put my glow stick on a 4*60. I flew it 150 some odd flights before I lost it in a fog. Don't ask
Anyway bruce is right take her outside
Good Luck
Old 06-06-2007 | 06:08 AM
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Default RE: servo chatter/spastic

I would also check out that receiver pack very carefully. I had an experience with a 5 cell pack that wasn't assembled correctly. When you touched the pack, it would go from 4.8 to 6 volts and the servos would twitch. If you have one, connect your pack to a multimeter and move it around (the pack that is), looking for any voltage variations. In my case one of the bus bars hadn't been welded to an individual cell, the only thing holding it to the battery was the shrink wrap.

Andy
Old 06-06-2007 | 11:42 AM
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Default RE: servo chatter/spastic

WiFi and portable phones will also cause your servos to go nuts.

Basically the RX is looking for whatever signal it can find that seems to have clock pulses on it of a pre-determined frequency.

It locks onto the strongest signal available.

If your TX level is fairly low, the RX will pick up other transmitters that have pulsing close to what it is expecting.

WiFi and portable phones often do!

If I have my planes in my house on certain frequencies, and I shut off my TX, my planes go NUTS.

A range check is always a good idea when you are away from all of this noise.


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