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JR 500 Gyro / 2721 servo jitter

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JR 500 Gyro / 2721 servo jitter

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Old 08-28-2011, 12:13 PM
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gooseF22
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Default JR 500 Gyro / 2721 servo jitter

Having a small issue.

My kitty cat has the twin rudders (JR2721)'s, and the Nose Gear (JR 2721) on a matchbox, wired up after a JR500 Gyro. RAdio is 12X, and gyro is set up on Rudder channel (feed) and Aux2 (control). Im getting constant jitter on the rudder servos, but the Nose gear steering is quiet. I swapped to a spare 2721 and although not as bad, its still jittering

I lowered the regulator voltage to 5.2 volts for the system, and that helped some, but I dont want to lower it more that that. I plugged a 5 cell nickel and bypassed the regulators in it and it got worse, over 6 volts..

I also bypassed the gyro just to make sure.

So.. it appears the 2721's are voltage sensitive, very strange. It just sits and vibrates..

I also put the sensitivity at 0 and 50%. Nothing worked. I got it less but still there. Its on about 6 feet of extension. Jitters when I bypass the matchbox too, so I guess its voltage, but 5.2 volts making them jitter?

Ideas?

thanks...goose
Old 08-28-2011, 12:31 PM
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rcand
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Default RE: JR 500 Gyro / 2721 servo jitter

ORIGINAL: gooseF22

Having a small issue.

My kitty cat has the twin rudders (JR2721)'s, and the Nose Gear (JR 2721) on a matchbox, wired up after a JR500 Gyro. RAdio is 12X, and gyro is set up on Rudder channel (feed) and Aux2 (control). Im getting constant jitter on the rudder servos, but the Nose gear steering is quiet. I swapped to a spare 2721 and although not as bad, its still jittering

I lowered the regulator voltage to 5.2 volts for the system, and that helped some, but I dont want to lower it more that that. I plugged a 5 cell nickel and bypassed the regulators in it and it got worse, over 6 volts..

I also bypassed the gyro just to make sure.

So.. it appears the 2721's are voltage sensitive, very strange. It just sits and vibrates..

I also put the sensitivity at 0 and 50%. Nothing worked. I got it less but still there. Its on about 6 feet of extension. Jitters when I bypass the matchbox too, so I guess its voltage, but 5.2 volts making them jitter?

Ideas?

thanks...goose
I have 2 G500 gyros. First, make sure the sensitivity is not too high. Next, I stopped using the 2721 for similar reasons on almost any type of flight surface or channel. I have had no problems using this gyro with 8611A or 8711 with the regulator at 5.8 volts.
Old 08-28-2011, 12:49 PM
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S HARRIS
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Default RE: JR 500 Gyro / 2721 servo jitter

Goose get rid of the 2721's and get 8411 or better. Been there done that! Scott
Old 08-28-2011, 05:09 PM
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InboundLZ
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Default RE: JR 500 Gyro / 2721 servo jitter

Yep, what they said...jack those servos out and your problems will go with them!

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