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How to center servos w/o power

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How to center servos w/o power

Old 03-06-2008, 02:17 PM
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Default How to center servos w/o power

I'm building my first ARF and I'm getting to the point where I need to install the servos and control rods. Now, in the instructions it says to center the servos. I have a battery, ESC, and receiver but I don't have a charger yet. I'd like to finish building the plane but since I don't have a charger, I don't want to plug in the LiPo battery before first charge.

Can you adjust the servo horns without powering them up? Do you just unscrew the horn, move it to the center, then screw it back down again?

Old 03-06-2008, 02:41 PM
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Default RE: How to center servos w/o power

You need to Cenrer the Trims on the Tx then power
up the Rx so the Servos will will Center. Then turn off
the Rx then the Tx. Now you can Unscrew the servo
Arm screw and Center it or adjust it to 90 degrees.
Then re tighten the screw.
For the record, you Assemble an Arf and Build a Kit.
Hope this helps.

Old 03-06-2008, 04:54 PM
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Default RE: How to center servos w/o power

For the record.

All my planes are built and maintained by me.

Old 03-06-2008, 05:00 PM
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Default RE: How to center servos w/o power

Different recievers will center the servos differently, you need to power them up to make sure they are centered.
Old 03-06-2008, 08:40 PM
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Default RE: How to center servos w/o power

It's often handy to have a 4-cell receiver pack available to power the receiver for setup.

In cases where you can easily access the servo arm, simply center the arm by eye and set up the pushrods. When you finally get to powering up the system for the first time, you can remove the servo arms and re-center them. If they don't quite center up at that point, use the SUB-trim setting of your radio to fine-tune them back to center.
Old 03-08-2008, 03:25 PM
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Default RE: How to center servos w/o power

I turn the servo arm to the stop at one end, then run the servo to the other end and split the difference where the centre is. this will put you in the ballpark. Then centre them when you get the batt charged as Matt says, for finer adjustment.

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