I have been flying a DX-7 since last December. I purchased a tray for the DX-7 this summer. I had had no problems and loved the system. I read a post a month ago about the bind button contacting the tray. I stopped using it. I still had no problems. A friend at our field kept having his planes become unbound. I thought it was a freak thing. About two weeks ago I had it happen to two planes on the same day. I had flown them both previously. They were seperate 7000 recievers. I shut one of them off and turned it back on and it reestablished communication. The other one I could not get it to rebind even with the bind plug. I had to switch to a blank model, copy the previous model and rebind. It worked fine for a week. Today I went out flying and and one of the same planes did it again and I had to rebind. A different plane did it to me today also. I had just switched models to this new plane. I tried everything and it worked correctly. I shut it off and fueled up the plane. I turned it back on to start the engine. The servos centered, hummed and nothing. I turned everything on and off probably 10 time to try to reestablish a link. I tried waiting several minutes. I played with the bind button thinking it might have a short or something. We tried switching batteries in the transmitter with one of the other spextrum guys that weren't experiencing problems. I switched back to my other two planes and everything on those two planes worked okay. I went back to the new plane and nothing worked.
Both my planes and my friends are all glow planes 1.20 to .63 in size. It happened on both 4.8 volt packs and 6 volt packs One of the 6 volt systems had a regulator 6volt in it. I really believe it has something to do with the transmitter. Because two of my receivers have never done it and three have. I have never lost a bind in the air, only on initial power up. It is a big pain to rebind. I was a futaba guy converted to spektrum, so I have mostly futaba switches.
The first time it happened I want to mention that the one plane wouldn't rebind. We had both recievers exposed and we noticed that during the binding process only one of the lights went out. A friend bound it to his transmitter with no problem, but I could rebind it to mine. I then thought to switch models to a blank set up. It then bound. I just copied it over.
Is this a software issue or a link issue with our transmitters?