ORIGINAL: rlipsett
you have never dealt with hitech programmable servos. you program the servo itself. you can set the centerpoint anywhere in 360 rotation so the centerpoints of all servos would be spot on. you then can set how many degrees you want to rotate, I believe up to 180 degrees lock to lock but the resolution suffers past 120. the programmer does not remain in aircraft, unlike a servo mixer
Yes Ihave used the Hitec programmer and I will repeat myself again LOL All these devices do is match up the center and end points, they do NOTHING for the sweep between adjustable points. So when you figure in manufacturing tolerences of the pot, driver IC and controller board components you will get servos that degree slightly different. The only way to get away from this is to use higher grade components and thus drive the cost of servos even higher. I can get virtually zero amp draw at the adjustable points, that is easy. It's the getting no bind at 1/4, 1/2, 3/4 stick deflection and anywhere else in between that is a pain in the butt. This is the main reason SWB came up with their floating servo tray set up. Not as critical with ailerons and elevators as usually there is enough flex in the surface to compensate. For rudder there really is no need for a combined torque more then 600 OZ and nowadays that can be accomplished with 2 servos. I remember having do do this with 4 JR 8411 servos, so glad those days are over.