Gotta_Fly

My Feedback: (2)

Hey Fellows

I fill kinda stupid for wasting a thread but Ive run completely out of ideas, First off let me fill you in on what's going on a little bit, Ive been flying for about 3 years now, and just in the past year I got bit by the Giant scale Bug, So all Ive been doing is buying, building and learning everything I can possible learn about these bigger gas drinking birds.
Well since I enjoy flying 3D so much and to help from banging up one of my $4000 dollar babies (and that still don't guarantee me not crashing) I like to use one of my smaller size planes like either my UCANDO.46 or .60 size, or maybe 78!QUOT! Edge to practice what ever maneuver it is I'm trying to work on.
But here's my problem and I have tried everything I know how and I'm getting to point where if I try it again without any success one of us is going in the river, I know that sounds very childish but Ive been working with these planes long enough to be able to fix a problem like this but I'm drained and embarrass that I cant fix this simple problem, OK we have all heard about servo chattering right, and usually it maybe something as simple as you forgot to turn your radio on which will make your servos chatter from picking up other freq's and sometimes if you have to much voltage going through your RX that might mess with it, but here is my setup and by the way I'm using the .60 size U CAN DO with a Webra 120 up front, I'm using Hitec 605 servos all the way around except the throttle which is a Hitec 425BB, I'm using a 1900mAh 6v lithium Ion Duralite plus battery with a regulated regulator and right now I have it set on 5.5v I'm using a Futaba FP-R127DF RX, and a heavy Duty DSC Switch.
So as you can see there is nothing really cheap I'm using but every time i turn the power on the servo's go nuts, and then it will stop but when it stops the rudder might be all the way left, and with the elevators one might be up and the other down, then If I move my sticking on my radio a little bit the control services will work fine for about 20 seconds then all hell breaks loose, I don't know what to do with it, I have changed batteries and put a regular 4.8 in it and that didn't work, I tried a different RX but that didn't fix it, I know its not the servos cause there all brand new.
I'm sure this is something simply and I feel like an idiot already, so I'm open for all suggestions please,... Thanks a lot everyone...

XJet

I'd start by swapping out the LiPoly battery and regulator for a regular 4.8V pack. If this solves the problem then you're a lot closer to the solution.

It's not unknown for regulators to become unstable and introduce significant noise onto the feed to the receiver/servos.

Have you actually checked the voltage coming out of the regulator -- is it actually the expected 5.5V?

Rodney

If switching back to NiCad doesn't help (it most probably will) be sure that you have very good connectors, especially if you have added any extensions to the servo wireing. Best to not use extensions, just cut and solder in extensions using at least 22 gauge wire, 20 gauge if possible. You might even try using seperate battery supplies for the servos and receiver with the servo wiring being heavy duty all the way.

wisdom-seeker

Check your receiver antenna routing. Make sure that it is as far as possible from other wiring, and does not run parallel to any servo wires. Also look for loose metal-to-metal contact in any and all of your mechanical linkages, and any part of the plane's construction.

Gotta_Fly

My Feedback: (2)

Thanks guys I'll give these a try, one of you guys mentioned trying 20g wire, I know where to get 18g and 22g but not 20g where would I order some??, or better yet i have plenty of 18g wire would this work or is it to much. and last if i change all my wire inside to 18g and i mean everything except he wire that's comeing out of the servo ofcoarse, do you think I could go back and use about a 1900mAh litium Ion battery with a 6v regulator??

Thanks again