DX3R Glitching During Races
 

This past weekend I was at my local track racing indoor with my Losi 8ight-T, and at the start of the second heat my DX3R start glitching. Most of the time it went to fail safe mode but a few times it locked up where the servos were at. It would only glitch at each end of the track when I was the furthest away from where I was standing. I also noticed it would only do it during a race or practice because I could sit it on the pit wall and walk to the other end of the track and both servos worked flawlessly. I had an SR 300 Rd to begin with, then tried the Losi version of the SR 300 that I had and it did the exact same thing. I have switched out to brand new fully charged batteries in both the Rd and tx and still the same thing. I checked all the wiring and it all looks to be in good shape. I am running a hitec 7950 for steering and a Xp 1313 for throttle. I have my radio set on 5.5ms for the rate for digital servos. I am wondering if anyone has had this problem before and what they did to fix it. I don't think I left n e thing out but if I did I'll try to remember to post it up. Thanks for any help in advance.

I heard of others that experienced this and they just rebinded the RX to TX. Also I am not sure if it is because you are using the SR 300 with is not DSM2. DSM2 consistently provides faster response and more precision than most non-DSM 2.4GHz protocols. Maybe, try and go back to 11ms and see if it works normal

Also quoted
2. Q: Sometimes the system takes longer to connect and sometimes it doesn’t connect at all. Why?
A: In order for the system to connect (after the receiver is bound) the receiver must receive a large number of consecutive uninterrupted perfect packets from the transmitter. This process is purposely critical of the environment ensuring that it’s safe to use when the system does connect. If the transmitter is too close to the receiver (less than 4 ft) or if the transmitter is located near metal objects (metal Tx case, the bed of a truck, the top of a metal work bench, etc.), connection will take longer and in some cases connection will not occur as the system is receiving reflected 2.4GHz energy from itself and is interpreting this as unfriendly noise. Moving the system away from metal objects or moving the transmitter away from the receiver and powering the system again will cause a connection to occur. This only happens during the initial connection. Once connected the system is locked in and should a loss of signal occur (failsafe) the system connects immediately (4ms) when signal is regained.
3. Q: I’ve heard that the DSM system is less tolerant of low voltage. Is this correct?
A: The SR300 has an operational voltage range of 3.5 to 9.6 volts. With most systems this is not a problem as in fact most servos cease to operate at around 3.8 volts. When using multiple high-current draw servos with an inadequate battery/power source, heavy momentary loads can cause the voltage to dip below this 3.5-volt threshold thus causing the entire system (servos and receiver) to brown out. When the voltage drops below the low voltage threshold (3.5 volts), the receiver must reboot.
4. Q: Sometimes my receiver loses its bind and won’t connect, requiring rebinding.
What happens if the bind is lost during use?
A: The receiver will never lose its bind unless it’s instructed to. It’s important to understand that
during the binding process the receiver not only learns the GUID (code) of the transmitter but the transmitter learns and stores the type of receiver that it’s bound to.
If the system fails to connect, more than likely the transmitter is near conductive material
(transmitter case, truck bed, etc.) and the reflected 2.4GHz energy is preventing the system from connecting. (See #2 above)

I rebound it when I put my spare rx in, I even put it under a new model and it still does the same thing. Thanks for the info.

If you're running a switch then it's your switch going out

I thought about that but was thinking since it only did this when it was further away from me it radio related but I will change the switch and check it.

vibration from running, loose switch connections. i quit running switches a while ago.

You may want to install a glitch buster.Spektrum has them for about 10 bucks.It helped me with both my nitros and electric.

It very well can be that the servos are drawing enough current from the RX pack that it drops the voltage enough for the SR300 to brown out. I had that happen to me and the "glitch" buster capacitor saved my day. A lot of high speed and high torque digital servos can be very power hungry and your receiver may be a bit more power hungry than the specs state.

Spektrum glitch buster is about $5.00. It's a 16V 4700uf cap.

I've been running these same servos for nearly six months and never had a bit of problem. I switched to a whole new radio tray today with the same servos but took the switch off and it still did the same thing. Think I'm just gonna get rid of the spectrum and get an m11. Thanks for the suggestions guys.

That fixed my problem...

Wish I would have done it a long time ago. I called Horizon and they wanted me to send all my receivers in so they could check them then they would look at the radio. Made my mind for me. I'm done with the spektrum stuff!!!

Im glad ive done a ton of reading and some homework at the track.

Spektrum will never be for me. EVER!

I've been using Spektrum for seven years racing 1/8 buggy (nitro and electric), SCT, 1/12 scale, WGT, VTA, TC stock and mod, Crawlers, 1/10 buggy mod and stock and 1/10 4wd buggy mod and the only time I had an issue was with a new Savox 1257 in a 1/10 2wd buggy. A $5.00 capacitor solved the problem. Most of the servos are Futaba and some Hitec never a problem. JR many problems but those were all servo related.

Transmitters used in the seven years; Futaba 3PK and 3PKS, Spektrum DX3R and now DX3R Pro.