Dx6i mixing question

[bamaerker]

Okay, I have the DX6i, I thought I had mixed a little up elevator in with the rudder on my slowstick, however when I give it right rudder the elevator goes up slightly but left it does down just a hair. The manual doesn't help me a whole lot. I have my rudder servo in the aileron slot on the receiver. Any help would great.
thanks
Barry

[MustangMan]

Originally Posted by bamaerker

Okay, I have the DX6i, I thought I had mixed a little up elevator in with the rudder on my slowstick, however when I give it right rudder the elevator goes up slightly but left it does down just a hair. The manual doesn't help me a whole lot. I have my rudder servo in the aileron slot on the receiver. Any help would great.
thanks
Barry

For all DX6i programmable mixes the amount of mix fed to the target control is independently settable for each side of center of the source control. Also, the direction of target control surface travel is determined by the "sign" of the mix value. In your case where I assume that you want "up" elevator regardless of which side of center you move the rudder. I believe you'll find that you need one mix value to be positive and the other negative. I don't have my transmitter handy to be more specific than that, sorry.

[AEAJR]

Mustangman is correct.

BTW, this is not a mix I would recommend. Automatically adding up elevator every time you hit the rudder might be good for the first few flights but after that I would turn it off. It can lead to stalls and crashes.

[cbatters]

Having trouble getting full positive deflection on elevator. Monitor display agrees with what I see on elevator servo.

Not trying to do anything fancy with mixing or expo. Just trying to get DX6i to provide straight 4 channel function as a starting point

1 What would affect full scale throw of elevator in positive direction?

2 Is there a "reset all" function I should try?

3 Can someone confirm that they get full plus/minus deflection on elevator on their DX6i



Clint

[wolfewinde]

You can just reset everything to zero or just deactivate the mix. I also would not recommend the mix u r trying to come up with. It is just going to keep you from learning to fly correctly.

Wolfe

[cbatters]

Not interested in mix. Just want straight linear mapping between elevator stick and output that provides full scale.

I would be happy if elevator behaved like rudder or aileron controls.



Clint

[Figure.N9ne]

Originally Posted by cbatters

Not interested in mix. Just want straight linear mapping between elevator stick and output that provides full scale.

I would be happy if elevator behaved like rudder or aileron controls.



Clint

are you maxing out the end point adjustment? i believe its called travel adjustment on the dx6i

[cbatters]

Regarding elevator mix: is there something I can check to make sure there is no mix enabled that would limit full scale range? (I also have DR and EXPO inhibited.)

Good starting point would be to confirm that someone else has a DX6i where elevator behaves like aileron In terms of full scale range. (or is my elevator range limit normal.)


Clint

[xmech2k]

I'd really like to help, but I need some clarification on what you're seeing on your end. On the monitor page, how far is the elevator carat moving up and down scale? Is it in the middle when neutral?

[cbatters]

Originally Posted by xmech2k

I'd really like to help, but I need some clarification on what you're seeing on your end. On the monitor page, how far is the elevator carat moving up and down scale? Is it in the middle when neutral?

With elevator stick at neutral, sub trim 0, travel range 100%, digital trims c entered. Monitor = -.80

Pulling back on elevator , Monitor = -2.00

Pushing elevator forward, Monitor = +.50


Thanks for help,

Clint

[xmech2k]

Hmm.. That doesn't sound good. Are all the mixes inhibited? Paging through the manual, that's the first thing that comes to mind.

[cbatters]

Originally Posted by xmech2k

Hmm.. That doesn't sound good. Are all the mixes inhibited? Paging through the manual, that's the first thing that comes to mind.

All mixes inhibited. (I tried enabling elevon mixing and observed the interaction. Disabled, none of the other inputs had an effect on the elevator output)

$99 question is if anyone else can get +2.0 output on elevator.



Clint

[xmech2k]

A thought occurred to me, is the elevator output this way in every model program? That's one way to see if there's an electrical or mechanical problem. And then that's also one way to do a reset. If the other model memories don't behave this way, copy in a blank one, then start your programming over. It would be nice to know what's causing this, though!

[cbatters]

All models behave the same. Mixes inhibited, acro mode, 100% travel Programmed for all channels, elevator limited to less than 2/3 full scale where other channels work as expected with full scale response on monitor.

(all I want is elevator to behave like rudder or aileron.)

[xmech2k]

Then it sounds like something is wrong with the radio. Maybe bring it to a LHS and have them look, but sounds like it needs a repair.

[cbatters]

Originally Posted by xmech2k

Then it sounds like something is wrong with the radio. Maybe bring it to a LHS and have them look, but sounds like it needs a repair.

Still trying to find someone with a DX6i where the elevator on the monitor display is centered.

(or I find a local hobby shop and pry open the box and compare with mine)



Clint

[xmech2k]

Originally Posted by cbatters

Still trying to find someone with a DX6i where the elevator on the monitor display is centered.

Umm, me.

I guess maybe I don't really understand the problem. Sorry.

[pm79311]

My elevator is centered on the monitor, and physically centered on the servo in the plane.
first make sure the elevator trim button is centered.
on the elevator sub trim, set to 0 and inh
go to monitor and see if it is centered.
while watching the monitor, move the elevator trim button up or down to see if
the elevator can be centered. if not or if when sub trim is inh and 0 and trim button is centered, the monitor is not centered, you should take your tx in for repair.

[pmullen503]

Originally Posted by cbatters

With elevator stick at neutral, sub trim 0, travel range 100%, digital trims c entered. Monitor = -.80

Pulling back on elevator , Monitor = -2.00

Pushing elevator forward, Monitor = +.50


Thanks for help,

Clint

One thing to check first: Does the servo arm deflect the same degree either side of neutral when you give it full up and down at the transmitter?

If so, then check this: when the stick and elevator are neutral is the pushrod at a 90 degree angle to the servo arm and is the control horn is 90 degrees to pushrod and at 90 degrees (ie directly below) the elevator hinge pivot point?

If not, you've built the differential into your linkage.

If you have not done so already, reset that model memory. Even if the mix is inhibited, I've had weird offsets when trying to do exotic mixes, especially when trying to map a proportional signal to an on/off channel like gear or flaps.