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Servos twitching

Old 05-08-2023, 04:40 AM
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zx6rg2
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Default Servos twitching

Hi all has anyone seen this before itís a new build jeti ds16 with a rex 10 and a cortex gyro running Mc Gregor MG2611WHV ,when the turbine x45 gets to a certain rpm the rudder starts twitching if I increase power it goes,I havenít plugged the other servos in as yet canít say if itís on all surfaces
Old 05-08-2023, 04:55 AM
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camss69
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Originally Posted by zx6rg2
Hi all has anyone seen this before itís a new build jeti ds16 with a rex 10 and a cortex gyro running Mc Gregor MG2611WHV ,when the turbine x45 gets to a certain rpm the rudder starts twitching if I increase power it goes,I havenít plugged the other servos in as yet canít say if itís on all surfaces
Is the gyro on or off?
Old 05-08-2023, 04:59 AM
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zx6rg2
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Hi the gyro was on
Old 05-08-2023, 05:55 AM
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This issue is caused by acoustic noise from the turbine being picked up by the Gyro. The remedy is to build a soundproof box around the Gyro. We have one available now specifically for a Cortex Pro.

https://aeropanda.com/products/hush-...69c293a2&_ss=r

Danny
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Old 05-08-2023, 09:23 AM
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chriskerby1
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I had this issue before with no gyro installed. Definitely acoustic noise from the turbine never got to the bottom of it. It would stop when increased power.
Old 05-08-2023, 12:33 PM
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Originally Posted by F1 Rocket
This issue is caused by acoustic noise from the turbine being picked up by the Gyro. The remedy is to build a soundproof box around the Gyro. We have one available now specifically for a Cortex Pro.

https://aeropanda.com/products/hush-...69c293a2&_ss=r

Danny
We need one specifically for the Assist RXs.
Old 05-08-2023, 12:48 PM
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sirrom
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Default twitching

Originally Posted by zx6rg2
Hi all has anyone seen this before itís a new build jeti ds16 with a rex 10 and a cortex gyro running Mc Gregor MG2611WHV ,when the turbine x45 gets to a certain rpm the rudder starts twitching if I increase power it goes,I havenít plugged the other servos in as yet canít say if itís on all surfaces
Can you post a picture of your install? Is your gyro next to the ECU or is it next to a RX or anything else that can generate noise. In my installs I try to get these components separated from one another.

Just food for thought.

Patrick
Old 05-09-2023, 12:28 PM
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Vincent
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You could try installing a noise choke on that line.
Old 05-10-2023, 12:29 AM
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Try using a better quality servo ?

modtron
Oxford UK
Old 05-10-2023, 06:13 AM
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GuysÖ.the cause of this is noise from the turbine. Not servos or where the gyro is mounted. This phenomenon has been observed since mems type,gyros started being installed in turbine model aircraft. It can affect every manufacturers gyro system. It can be caused by any manufacturers turbine. The solution is shield the gyro from the noise.
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Old 05-10-2023, 08:04 AM
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If you are not married to the Cortex, the Smoothflight SF16 latest version has a turbine filter that eliminates the unwanted servo movements caused by turbine noise. It has off, low, medium, and high filter settings.
Thanks,
Tone
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