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-   -   Dual Elevator servo problem (https://www.rcuniverse.com/forum/3d-flying-82/3281848-dual-elevator-servo-problem.html)

Razor-RCU 08-20-2005 05:28 PM
Dual Elevator servo problem
 
I am setting up my Funtana-90 and I just cannot get the elevator halves to move perfectly in sinc- I am using CH 2 & 8 on my Futaba-9C, I get them close but one seems to move slightly quicker than the other-

I have the EP adjustment dead on with my triple rates, so they are starting and ending level, but one side seems to get to full deflection before the other- I am going crazy trying to dial it in... It really is only noticeable at 140% def. but it still bothers me-

I thought expo. was the culprit but that is not it-

Whatta all think?

Thanks in advance-

thedak 08-20-2005 05:43 PM
RE: Dual Elevator servo problem
 
http://www.smart-fly.com/index.html

equalizer

daveopam 08-20-2005 05:51 PM
RE: Dual Elevator servo problem
 
Have you tried a different servo on one side? Two servos from the same batch can be a little different.


david

blikseme300 08-20-2005 07:14 PM
RE: Dual Elevator servo problem
 
ORIGINAL: Razor-RCU

I am setting up my Funtana-90 and I just cannot get the elevator halves to move perfectly in sinc- I am using CH 2 & 8 on my Futaba-9C, I get them close but one seems to move slightly quicker than the other-

I have the EP adjustment dead on with my triple rates, so they are starting and ending level, but one side seems to get to full deflection before the other- I am going crazy trying to dial it in... It really is only noticeable at 140% def. but it still bothers me-

I thought expo. was the culprit but that is not it-

Whatta all think?

Thanks in advance-

Are you using the Ailevator function or PMIX? PMIX often does this. I don't have a 9C anymore, but I had the same problem initially. When I started using AILEVATOR the problem was gone. On page 50 in the downloadable manual there is a description of this. Hope this helps.

Safe Flying!

Flyjets 08-20-2005 08:05 PM
RE: Dual Elevator servo problem
 

Razor

Tell me something what are the centering offsets U setup in ur Radio?

Sometimes servos if there off by 1 or two teeth will do what ur describing. The end points as u know have nothing to do with the rate of throw just then final throw length.

Try moving the arms to match the rates.

Ian'

E*nealio 08-20-2005 09:51 PM
RE: Dual Elevator servo problem
 
Use the Ailevator option and just put the aileron % at zero. Then Flaperons for a little nicer harriers.....good luck
if you need more specifics i can give em to you. pm me, basically the ailevator option, but no aleron. simple
have fun.
nealio

Razor-RCU 08-21-2005 09:38 AM
RE: Dual Elevator servo problem
 
Cool! Great advice EVERYONE... It is worth feeling a little stupid to get these working well- :)

I'll go do that right now- Ailevator...Hmmm That makes sense dialing out the Ail.

Flyjets- I matched up the angles... Is that what you mean?

Thanks again-

Razor-RCU 08-21-2005 10:15 AM
RE: Dual Elevator servo problem
 
Wow- I was close... I had Ailevator set-up but at diff. percentages [X(]

It looks much better-

Another question- when I dial in dual rates/expo. are both servos effected the same way?

Thanks again-

colled 08-21-2005 11:09 AM
RE: Dual Elevator servo problem
 
I have the same problem with my 9C. It is to do with the processing of each channel, which is done in sequence i.e. 1, 2, 3, 4.....8 etc. and there is a slight delay between each channel. So when mixing channel 2 to 8 there is a delay between the two servos. Using ailevators helped a bit but not much as at the end of the day it is still mix between 2 channels.

Razor-RCU 08-21-2005 01:14 PM
RE: Dual Elevator servo problem
 
1 Attachment(s)
I guess I could get a reversing "Y" and be done with it but I want flaperons/spoilerons- Seems like it is gonna be hard to get it dialed when the elevs. are not moving together perfectly-[:o]

I am just an average pilot who wanted something bigger than my typical 40 sized profiles or propjets so maybe I won't notice as much as some of y'all-

I wish I had a scale cuz this thing seems HEAVY- OS-160FX may have something to do with it-

Thanks everyone-
James

P.S> Here is a pic my wife took with me, my Irish Wolfhound (Puppy!) and the F-90

thedak 08-21-2005 03:29 PM
RE: Dual Elevator servo problem
 
I only use Hitec Digitals. I use the programmer to reverse one of the servos on a HD Y-connector.


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