hello,everyone .how to centralise the servo, jr 539 servo.One side move more than the other side move less. My tx is JR MAX 66 +RX.
I am new bird in this hobby. need help........

Make sure the servo arm is 90 degrees (square) to the direction of the pushrod when the surface is neutral.

Does the servo move the same degrees in both directions?

I'm not familiar with that transmitter. But if it has adjustable travel, make sure it is set to the same number in both directions (e.g. 120). With JR transmitters, you must move the stick while in the programming mode with the "travel" screen displayed.

lets start out simple....in the case of all the servos except throttle...hook up the servo to it's channel...remove the servo arm.....now with the stick cetered and trim centered...reinstall the servo arm so that the arm is 90 deg centered on the servo......neutral the control surface and adjust the pushrod to hook up between the servo arm and the control horn...in the case of the throttle....as above except you want throttle stick down and throttle trim almost all the way down, up a click or 2...you hook up the servo arm and pushrod so that the carb is closed...make sure the carb opens 1/8 inch with trim.....and the carb open all the way with throttle...adjust as required
Good Flyin to ya

[img][/img]

this is what he is talking about, if the pic come through. With every thing on the radio transmitter centered your servo arms should be at 90 degrees like the pic. You may only have on half of the arm shown in the pic and thats fine. If this pic does not come through I'll try again, I am new to posting pic's

sticks

sorry I do not have the best camera going but it should give you a idea.


[img][/img]

Here is a couple of pic's of a plane with servo's installed.

(The problem is not the camera, it's that you're not activating Macro mode I believe. Generally a little flower logo on the button that activates that function.)

[img][/img] OK, thanks I did not know that it had a micro mode. this is a big improvement. Hope the better pic's help. anyway with the transmitter set to center position on all axis's your servo's should look like these.

It's a must for detailed pictures of plane set up and other things that require a closeup. Half the pictures posted here in RCU have that macro lack issue. Glad I could help.

thank mate, i follow the instrution and method you all give and i get back to you

goodday mate,Thankyou guy i manage to get the servo centrallise,
is it ok or not to use 4.8v 2700aMh ni/mh on my jr539 servo