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HomeRC & Power✈️Aircraft🚁HelicopterRadio - Spektrum DSM › DX8 losses bind to receiver?
07-30-2012 01:15 AM  8 years ago
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Raptor Pilot

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Northern Ireland U.K

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DX8 losses bind to receiver?
Hi guys, here is the background to my problem. I turned on my DX8, made sure i was on the right model and then pluged in the flight pack to my fixed wing electric model but the AR 600 DSMX receiver didnt respond, i tried another flight pack but no better. I tried a 4.2 volt receiver pack straight into the receiver but still no go. I had thought something must have happened the speed controler thats why i went straight into the receiver. All the receiver would do was the orange light would light for mabey a quater of a second when the battery was connected and then no lights at all and all servos were dead as if nothig at all was getting to them. I tried rebinding it and it rebound no problem and everything worked.
I then noticed that my ailerons were reversed and the throttle hold i had set up was erased from the transmitter, i set up throttle hold so that i can disable the throttle when im handeling the model or picking it up after a flight incase i knock the throttle stick foward and a electric prop bursting into life when you least expect it can do serious damage.
Everything else was working 100%, the expo and the rates were still all there. It only took a couple of minuites to re program the throttle hold and reverse the ailerons back to where i wanted them.
Here is my questions. 1, when i rebind a model should all your transmitter settings remain unchanged? 2, would there be some reason why the transmitter looses its bind with the receiver when it has already had hundreds of flights with no problems?
Any help is appreciated guys, thanks.
If it doesnt move and its meant too... use WD 40. If it moves and its not meant too...use duct tape!
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07-30-2012 01:36 AM  8 years ago
aerocal

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Central California

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Something sounds fishy.
The Rx will not "lose" bind unless it is told to.When you power it up it may refuse to "connect" if the Tx is too close .Ive noticed this to be true with the AR600 more than others.Usually if it doesnt connect right away and you back away with the Tx it will connect.
As for the settings being changed when you did rebind its almost not possible without some other influence.Are you positive you didnt Copy that model to another position and have the settings not be the same?
Mistake on selecting the model position?
You tried to connect and it was actually on the wrong model?

It is possible to break the bind by powering the Tx in bind mode without the model being powered and actually doing a bind.
That doesnt explain the changed settings though.Like I said it really not possible without some other action.I have had controls reversed or not right before flight.Thats why I learned early on to always do a control check before every flight.Everytime though it was something I did and completely forgot about at the time.Like programming something in the wrong model on the bench,shutting it off and then when I go back to it I see its on the wrong model and just switch it and go back to what I was doing.Completely forgetting or not realizing that I actually changed something in another model.Usually I later have a flashback and an AHA moment.
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07-30-2012 01:49 PM  8 years ago
cbflys

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Nesconset, NY - USA

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It is possible to break the bind by powering the Tx in bind mode without the model being powered and actually doing a bind.
This statement doesn't make any sense. If this were the case, every model in the TX would lose its bind when you bind a new one. There isn't any bind information stored in the TX.

When the RX / TX is bound, the TX GUID and model memory position are stored in the RX's flash (non-volital) memory. For a RX to lose bind, one or both of these parameters has to become corrupt. That can happen for a number of reasons; firmware bug, bad hardware, etc. I'm not saying that is what happened, but it is a possibility.
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07-30-2012 02:58 PM  8 years ago
BarracudaHockey

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Jacksonville FL

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Eh sorta.

Putting the tx into bind resets the resolution down to 1024 until it negociates with the reciever. If you're bound to a 2048 rx it could indeed cause it to appear to be unbound.
Andy
AMA 77227
http://www.jaxrc.com
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07-30-2012 03:09 PM  8 years ago
dkshema

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Cedar Rapids, IA

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This statement doesn't make any sense. If this were the case, every model in the TX would lose its bind when you bind a new one. There isn't any bind information stored in the TX.
If you turn the TX ON while having it in bind mode, whatever RX was bound to that particular model memory will no longer be bound to the TX. The RX doesn't have to be in the picture. Models stored in other memories remain bound as they should. People with the original JR7202-based DX7 found this out the hard way. The bind button sticks out beyond the rear of the TX case. If the TX was laying on its back, or installed in a transmitter tray, it was possible to unknowingly press the bind button while turning the TX ON. That put it into bind mode and the stored model RX would seemingly have "lost bind".

Binding should NOT cause functions to reverse, or change doing what they had been set up to do. Binding WILL reset your failsafe settings (at least with respect to throttle setting).

Binding is supposed to be a one-time, set and forget, kind of operation. It is supposed to happen only when you want it to, not every time, or at random intervals.

Make sure that if you have something plugged into the RX bind port, that the "third" lead in the cable (orange wire for JR/Spektrum stuff, white wire for Futaba) is either NOT installed in the plug, or that it's not tied to ground somehow. The RX will go into bind mode if the third pin in that connector is grounded at power-up.

-----

As for not linking up if the TX is too close to the RX, this is what Aerocal was referring to:

-----

If all other models bound to your TX are OK, you may have something wrong with the RX and it might need a trip to Horizon.

You could attempt to bind that RX to a new model memory in your TX and see if it continues to behave weird. Set that new model memory up as you want it to be. If it works OK you might then go back to the original model memory location and reset that particular model. Maybe something has gotten corrupted in the stored model memory for that particular RX.
-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz
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07-31-2012 02:14 AM  8 years ago
cbflys

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I just finished testing what Dave said about a receiver losing its bind when the TX is turned on in bind mode and the receiver is not powered on. Under this condition the receiver did lose its bind with the TX. 'aerocal' and 'dkshema' were right and I stand corrected. I apologize for not checking this out first before I posted.

However, if the RX loses bind without the TX being powered on in bind mode, then something is definately wrong.
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07-31-2012 04:35 AM  8 years ago
dkshema

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Cedar Rapids, IA

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No need to apologize, we all learn something as we wade through RunRyder from time to time.

If the OP has a different receiver, he should try binding it to the TX with the model memory that seems to be acting up.

And he needs to try binding the "problem" RX to another model memory.

Just some basic troubleshooting tips.

And I would suspect that maybe the receiver he has, needs to see Horizon's service center real soon.
-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz
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07-31-2012 09:36 AM  8 years ago
Raptor Pilot

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Northern Ireland U.K

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Thanks for all the answers guys.
Some more info for you. I had flown the model half an hour before with no problems and nothing was flown on the transmitter untill i picked the transmitter back up again and turned it on, i always check to see what model im on and it was the correct one, when i pluged the flight battery in, nothing happened. No connect, no orange lights lit up or flashing, just a tiny orange flash for a quater of a second. Im 99.9% sure the bind button wasnt pushed as it displays a differnt picture on the transmitter screen when it is turned on with the bind button pushed. The flight battery i use has deans connectors on it and they are sometimes fiddly to get a good first time connection and you can see the small spark sometimes, could this spike have up set the receiver bind connection? Im going to try what Dkshema said about binding that receiver to another model memory and see if i can reproduce the problem.
Ihave had no problems what so ever with my DX 8 and its more than likely a one off problem but you never know.
If it doesnt move and its meant too... use WD 40. If it moves and its not meant too...use duct tape!
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07-31-2012 12:59 PM  8 years ago
dkshema

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Cedar Rapids, IA

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First impression is the RX is acting bad.-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz
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07-31-2012 01:06 PM  8 years ago
BarracudaHockey

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Jacksonville FL

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I just finished testing what Dave said about a receiver losing its bind when the TX is turned on in bind mode and the receiver is not powered on. Under this condition the receiver did lose its bind with the TX. 'aerocal' and 'dkshema' were right and I stand corrected. I apologize for not checking this out first before I posted.
I said it first!!
Andy
AMA 77227
http://www.jaxrc.com
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07-31-2012 05:39 PM  8 years ago
aerocal

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Central California

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Raptor Pilot
I think you are intermixing terms."Bind" is what you do to initially get the Tx and Rx talking on the same page.Binding is a 2 step process.It "binds" and then "connects" in the same operation.Once it is bound it stays bound.When you power up after everything is bound it simply "connects".

So you have "Bind" and "Connect"

Using the right term helps when trying to explain an issue.Many get the 2 terms intermingled when they are actually 2 separate things.

If you have trouble getting something to "connect" after it has already been bound it doesnt mean it has lost bind.It just means that it s refusing to "connect".There are a few reasons this can happen.
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07-31-2012 07:03 PM  8 years ago
Raptor Pilot

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Northern Ireland U.K

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I think you are intermixing terms
Sorry, on this side of the world where i live when we bind a receiver we have a bind plug stuck into the bind port of the receiver. When we turn the transmitter on and plug a model battery in and it responds the way it should, we also say that it binds.
Mabey i should be saying that my model has lost its connect but after re binding it with a bind plug it found its connect but the throttle cut was erased from the model memory and the ailerons were reversed.
If it doesnt move and its meant too... use WD 40. If it moves and its not meant too...use duct tape!
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07-31-2012 08:36 PM  8 years ago
cbflys

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Nesconset, NY - USA

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I can say that if some of the programming (ailerons reversed, throttle cut no long active) has changed on its own - it is almost certainly NOT the receiver. That is a transmitter issue. Perhaps it is related to losing the bind as well, as the flash memory in the TX may be having some issues.
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07-31-2012 09:02 PM  8 years ago
dkshema

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Cedar Rapids, IA

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There is the possibility that the transmitter is indeed at fault. With some luck, some of the troubleshooting steps noted above ought to help sort that out.-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz
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07-31-2012 10:45 PM  8 years ago
Stephen Born

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USA

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No need to apologize, we all learn something as we wade through RunRyder from time to time.
+1
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08-10-2012 12:03 AM  8 years ago
Raptor Pilot

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Northern Ireland U.K

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Just an up date guys, im still non the wiser as why my transmitter and model behaved the way it did, i have tried everything that i can think of to try and reproduce the problem but so far i have failed to do it. I have flew helis and fixed wing on the same transmitter since and everything is normal. I have flown the model that lost its connect and so far every time i switch on and plug the flight battery in, all behaves the way it should. I will just keep flying and see what happens, im thinking it was a one off that might never happen again. Thanks everybody for all the help and suggestions.If it doesnt move and its meant too... use WD 40. If it moves and its not meant too...use duct tape!
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HomeRC & Power✈️Aircraft🚁HelicopterRadio - Spektrum DSM › DX8 losses bind to receiver?
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