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HomeAircraftHelicopterAerial Photography and Video › 360 degree servos keep rotating
01-01-2011 08:34 PM  7 years agoPost 1
MarkToo

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Cambridge, ON

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I just got my Mongoose camera mount. It has Futaba S9202 servos that drive the pan and tilt via a belt set up. When I bind the mount to an AR7000 with a DX7SE, the servos just keep rotating.

Playing with the sub trims and flight trims change nothing. What am I missing here?

Thanks in advance.

Regards,
Mark

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01-01-2011 09:31 PM  7 years agoPost 2
Yeehaanow

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Vermont

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The trims do change the speed of rotation though, correct? Can you use the sticks to get it to stop?

If both of those are a Yes:
It sounds like you'll need to open up the servo case and take the top off. Hopefully you'll see the potentiometer under the spline. With your trims on the radio set to 0, and everything on, take a screw driver and turn the pot till you find the center point and the servo motor stops.

If no, then you must have it in the wrong channel or something else is wrong.

Temperature will affect it and you might have to use a little trim now and then.

-Tim

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01-01-2011 09:47 PM  7 years agoPost 3
GotyaNick6100

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Hollister,CA-USA

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If the radio trim is not stopping the servo then the server will require a modification adjustment.This adjustment can be made by removing the four case screws exposing the server gears. Remove the top main drive gear, exposing the metal drive pin. By rotating the pin clockwise or counterclockwise you can speed up or slow down the response until you find the zero trim, where the servo stops completely. Once the servo is stoped place one or two drops of medium thickness CA and kick it. Replace the main drive gear and reassemble the servo at this time your trims should be set to zero! also don't forget to use plenty of Expo for the smoothest and best camera movement!

GotyaNick

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01-01-2011 11:45 PM  7 years agoPost 4
MarkToo

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Cambridge, ON

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Yup. Tweaking the pot did the trick.

I tried it with my 12X just in case it had something to do with the signal sent by the DX7SE but no change.

Thanks very much for the responses. Can't wait to try it out now.

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01-02-2011 01:19 AM  7 years agoPost 5
windy62

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USA

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If the radio trim is not stopping the servo then the server will require a modification adjustment.This adjustment can be made by removing the four case screws exposing the server gears. Remove the top main drive gear, exposing the metal drive pin. By rotating the pin clockwise or counterclockwise you can speed up or slow down the response until you find the zero trim, where the servo stops completely. Once the servo is stoped place one or two drops of medium thickness CA and kick it. Replace the main drive gear and reassemble the servo at this time your trims should be set to zero!
Why wasn't this done by whoever modified the servos?

windy62

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01-02-2011 02:29 AM  7 years agoPost 6
ErichF

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Sutton, NH

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I just got my Mongoose camera mount.
That should explain it right there.

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01-02-2011 02:50 PM  7 years agoPost 7
MarkToo

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Cambridge, ON

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That should explain it right there.
Well, I was going to set it up for FAI but, decided to stick a camera on it instead.

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