I have a DX7 receiver that I am trying to bind to a AR6200 receiver (the receiver is installed in an electric plan.) During the binding process, I enure that the throttle stick is all the way at the bottom and all other controls are in the neutral position. Normally this would mean that if the connection between the Tx and Rx is severed then the motor should stop and all servos should return to the center position, correct?

Well this doesn't happen - at least not entirely. I tested the set up on the bench a few times as follows, and every time I got the same result:

- I start the motor on a low throttle setting and pull the aileron, rudder and elevator sticks to one of the extremes
- While in that position, I turn the Tx off. If my understanding is correct, the motor should stop and all control surfaces should return to their neutral positions. Instead, what happens is that the motor does turn off, but all control surfaces stay in the exact same position they were before I turned the Tx off

Am I doing something wrong?

Thats how I do it as well. I guess I have never bothered to test it to find out. It almost acts like your plane battery power is turning off at that point. I thought there was some information about that receiver taking five seconds to rebind, so I am wondering if it would reset all control surfaces in five seconds, and if you have waited that long. Also, I know Horizon will reprogram those for free so it will rebind very quickly. On a more positive note, I have never had a spectrum receiver loose a bind so hopefully it wont matter. I checked the manual and it sounds like you are doing everything right. I think you may need some Horizon help on this one.

Best regards,

Throttle goes to 0, servos hold last position. Thats how it works.

Some of the high end recievers you can do a pre-set fail safe position with.

Madsen - no, after I turn the Tx off, the servos stay in their last position indefinitely. Of course when I trun the Tx back on, then within a few short seconds everything resumes (motor turns on, servos follow the stick position on the Tx.)

Barracuda - I kind of find it odd that the servos would keep their position (especially that the manual specifically talks about keeping the sticks in their neutral position during the bind.) I am sure there is a reason for it that I can think about, otherwise it defies logic to me.

Thanks for your responses. I may call Horizon regarding this any way, if I find something different I will add to this thread.

Barracuda,

Your statement was correct. I spoke with Horizon twice this evening: the first time a gentlemen told me that this was not normal and asked me to try this with other receivers and call him back if I had the same problem. I tried this with all my receivers (AR6000, AR6200 and AR7000) and had the exact same things happen. When I called back, another gentleman told me that this was normal for these receivers but other higher end receivers (eg. AR9000) would allow the fail-safe mode to be set at neutral. In essence, with the above receivers the throttle cuts after one second (assuming the throttle stick was in the off position during binding) but servos hold their last position.

The high end recievers can be bound one of two ways, I forget the name for it but you put it into bind mode then remove the bind plug and put the sticks/switches where you want everything and that will be your failsafe position. If you leave the bind plug in then you get the same behavior that you're seeing, throttle cut and hold on the surfaces.

The guy you talked to first could probably take apart a Saito 4 stroke blindfolded, it all depends on who picks up the phone when you call

Actually it was the second guy who was right. The first guy was telling me what I was seeing was not normal, and was implying either a receiver or a potential radio problem. He asked me to test the same scenario with my other receivers and if I had the same problem with other receivers (ie. servos holding their last position when the Tx is turned off) this could signal a Tx problem for which I had to send it to them to be repaired.

Glad the second guy picked up when I called them again [8D]

Yep, thats what I mean, it might have been an engine expert that picked up the phone the first time that might not have been up on the latest with radios.

To be honest, the only reason I caught it is because doing reviews I always read the manuals cover to cover (painful though it may be in some cases)