Binding Dual RX's with DX7?

[Chris]

I am using dual AR7000 RX's in a larger model. Each RX is powered by a separate battery and switch.

Do I turn on the left RX and bind that one first? Shut it off.

Then power up the right RX and bind it?

Or, do I turn on BOTH RX's at the same time and bind them both at the same time?

Does it even matter?

[Zeeb]

I don't think it matters, but you can try it each way then you'll know????

[thewrap]

I think you can bind both of them at the same time. I think I read something about it a while ago, someone was using dual recievers in a 50% and I read something about binding.

[Eury]

You can do it however you want, bind in sequence, bind at the same time, doesn't matter. I generally bind mine at the same time, just for convenience. It really doesn't matter.

[Chris]

I bound them both at the same time. Works fine.

I just need to do my setup and adjust everything and then bind them both again before I do the maiden.

Thanks guys.

[thewrap]

Good luck. I'm glad it all worked out for you.

[GooseF22]

if you have any dual servo surfaces on the separate receivers, bind them separately . I usually do the first bind with nothing plugged in, then do the setup and bind. this way, I dont get any sudden movements.

And those with the module: THis gets me alot.

Scenario: changing out the old 72 receiver to a spektrum but using the same programming on the old trusty radio.......

Forgot to switch to PPM from PCM.....plug in and bind and surfaces go haywire...broke one....darnit....

Dont forget to PPM your Module first.

[HuckinChikn]

i was actually wondering the same thing, i'm using the same setup in my katana.
everything is just about ready to bind to my DX-7, just waiting for my A123s

[Chris]

Here's the skinny on my setup:

Left RX
channel 1 -- power lead from regulator
channel 2 -- nothing
channel 3 -- right elevator
channel 4 -- power lead from regulator
channel 5 -- choke servo (on gear switch)
channel 6 -- left aileron (flaperon mix)
channel 7 -- rudder servo slaved to channel 4
battery -- power lead from regulator

Right RX
channel 1 -- throttle
channel 2 -- right aileron
channel 3 -- Matchbox -- left elevator -- powered by lead from regulator
channel 4 -- rudder servo (master channel with channel 7 as slave)
channel 5 -- power lead from regulator
channel 6 -- nothing
channel 7 -- nothing
battery -- power lead from regulator

I removed the power leads from the battery ports and plugged in the bind plugs. Both RXs still have power leads plugged in--so they are powered.

Turned on both RXs

Held bind button on TX.

Turned on TX.

Wait for both RX lights to go solid.

Let go of bind button on TX.

Turn off both RXs.

Turn off TX.

Remove bind plugs from both RXs.

Plug power leads into battery ports on both RXs.

Done.

Now I went in and dialed all my trims and set up all my travel on all the servos. Set my stick throttle to idle. Use Matchbox on right RX to reverse and synch elevator servo with Left RX servo on channel 3. Adjust mixing on channels 4 and 7 for ganged rudder servos. Check throttle and choke throw and adjustment. Dial in flaperons --subtrims-- travel throw on ailerons.

Now went back and re-bound the RXs again.

Remove power lead from battery port from both RXs.

Plug in bind plugs.

Turn on both RX switches.

Hold bind button on TX.

Turn on TX.

Wait for solid orange lights on both RXs.

Let go of bind button on TX.

Turn off both RXs.

Turn off TX.

Pull bind pugs out.

Plug power leads back into RXs.

Done.

That second bind was to set my failsafe. I want all surfaces to hold neutral and engine to idle. It's all set up now. Works great.

Was gonna maiden it last weekend, but couldn't because of the SNOW!!

[Zeeb]

Sounds like you're close!

But I'd like to clear up a misconception that Spektrum created with their definition of "failsafe". In this case the ONLY servo which goes to a predetermined position on loss of signal is the throttle. ALL other channels remain at last commanded position.

This is true of all the Spektrum rx's until you get to the AR9000/9100 or the JR921 nine channel 2.4GHz rx's. Then you can program either the Spektrum version of "failsafe" as noted above, or you can program what they call "smartsafe" which is actually what most of us think of when we see the term "failsafe" if you have an appropriate tx. That is you can program the desired positions of all the channels on signal loss.

The biggest advantage to the Spektrum "failsafe" is that all the subtrims, servo directions and flight trim settings are stored in the rx so that when you turn on the rx and before it links to the tx, your servos don't bang all over the place.

This is particularly annoying if you've got any servos reversed or mixed/slave channels as they all go to the radio's default settings when the rx is powered up and before it links. Re-binding them once the model is setup is the way to get rid of this annoyance, but the only servo channel that's gonna move on signal loss is your throttle...

[dick hanson]

Now you have up and broke some hopes that by programming in a particular setup -the model would will simply fly safely till the interferrence goes away

[Chris]

And here I thought all surfaces would remain neutral if I lost signal.

Oh well, it's Spektrum! It's bulletproof!! Right?

I'm a lot more confident with Spektrum than using PPM at our field.