Edgefinder

Hey guys, I put a couple of the Hitec HS-7955TG servos on a areoworks 50cc plane. The radio is a Spectrum DX7. With the radio sticks in the nutral position{elev} both servos will hum. I have checked the linkage and there is no binding. I first thought it might be interference so I moved everything to another room. Same problem. I took the linkage lose and there was still some intermiten hum but not as bad. If you put your finger on the servo arm with hardley no pressure just light touch it will hum like crazyYou can move the plane around tilt it in different directions and you can get it to go away. I tried this with some jr DS821's and no problem.I have never run into this before and was wondering if anyone can give some advice.

Nogyro

My Feedback: (10)

I just installed a set of 7955's, and they do make more noise at idle than compared to the 5955's. The 7955's are a high resolution servo, so this is part of it. When I changed the dead band setting from 1 to 2, much of the buzzing went away. They still center dead on in my Extra. The 5955's come preset with a 2 dead band I believe. I really don't think it's anything to be concerned about. It's just the servo trying to maintain neutral with the weight of the control surface pushing against it.

MikeMayberry

My Feedback: (1)

We call it "The sound of precision!"

Mike.

Mr. Mugen

Roger that! Anything that tries to stay centered that many times per second is definatley precision. [sm=thumbup.gif]

rcmario

My Feedback: (2)

I have the same problem is there a solution for this and How do you change the dead band setting

Thank you

MikeMayberry

My Feedback: (1)

You can change the deadband with the HPP-21 or HFP-20 programmer. However, it's not a problem as you indicate... it's the nature of the beast due to the high refresh rate.

Mike.