Spectrum reset?

[mattie-lodge]

There maybe a flaw on how it handles the low voltage but as I said I can't reproduce this 2-3 sec reset.

As Raptorheli2 has confirmed that his takes 2-3 secs to reset. But I've tried mine and three others and they all take 1/4 second ish. Not far off the same time as a 35mHz.

I think the cold has a serious effeect on the li-ion cells as well. I'm keeping a close eye on mine from now in.

Matt

[ChrisB]

I may put a thread on Runryder asking for comments from fliers in colder climates

[LipolyGone]

Good to hear that at least one person isnt having problems with his spektrum system. I to beleive this is more likely to be related to the cold stiffling the lipos ability to delever the voltages required. All week here it has struggled to get above 3 to 4 degrees add to that the windchill & a heli flying in all directions on a 3d style flight & you can get a very cold battery very quickly. I dont think even warming it up before use is going to stop the rx lipo pack from dropping out under load as your not exactly pulling huge amounts out of it to keep it warm.
Maybe it's time CSM developed a lipo warmer as another peice of electronic trikery we cant all do without then we can all go out & buy 18 channel rx's so we have the extra slots to plug them all in to.
And yes for those of you who dont know me that was sarcasm
Martin

[ChrisB]

In situations like these its always best to get information straight from the horses mouth rather than user opinions

Here is some power info from Spektrum

http://www.spektrumrc.com/Articles/A...ArticleID=1683


Its probably best to contact Spektrum directly and discuss it with them..

If i was ever going to have a power issue for a hardware reason it would of happened by now,either Lipos are losing capacity or its the cold causing it.Determination to fly in all weather conditions and expecting the electronics to cope isnt wise i think

[mattie-lodge]

I may put a thread on Runryder asking for comments from fliers in colder climates

Do it .com

Matt

[LipolyGone]

As Raptorheli2 has confirmed that his takes 2-3 secs to reset.
Matt

Well Paul does live up North, I guess if it's this cold down here maybe it's colder up there.
Maybe someone could try putting an rx set up in the fridge with an old lipo & do some experimenting on reboot times.
Then do the same with it in the freezer.
Martin

[ChrisB]

Do it .com

Matt

Probably not worth it in hindsite,i am convinced its cold weather causing Lipos to struggle and its probably better to speak to Paul Beard directly

[ChrisB]

To sum it up Spektrum say the voltage must stay above 3.5 and i would say thats a fair comment and voltage should never get that low unless there is a problem with the power deliver system,if the voltage is dropping that much then i would rather sort that than fit a power holding device and mask the problem possibly

I have just tested my 600N and the Align Lipo has done 4 flights when i last used it 3 weeks ago and it has not been recharged,with all servo wiggling (6965`s) i was getting 4.5 volts at the lowest even when i restrained the bladegrips and applied pitch to load all 3 cyclic servos

[SRH990]

I've noticed that while my DX7 took a few seconds to connect when switching on, with the module in my 9XII I find connection is very quick, maybe this is due to model match which only works on native Spektrum systems?

[raptorheli2]

i may live up north but i done this test in the house and we have heating you know up here.lol.

i have one of the very first dx7 sets and 700rx so perhaps that doesn't help the boot up time, i don't know for sure.

i do not see the point of a dc-up on a regulated setup, the point of it is incase a bec packs up briefly imo.

cheers

[Si_B]

I've just fitted a dc-up just to be safe, but no matter where I connect it i.e directly to the reciever or via a 'Y' lead, once I switch the power off I get no surplus control of the servo's (people are saying that they get 2-3 seconds before the reciver powers down).

All the right lights are lit up on the dc-up, but I'm a bit concerned whether it is actually doing anything ??

It's currently fitted via a 'y' lead to channel 7 in my ar7000, which shares the channel with the remote glow.

Regards,

Simon

[raptorheli2]

turn the rx power off and stir the sticks....the dcup should move the servos, well it does on mine anyway. what do you have it fitted to?

i would plug it directly into the rx and try it to prove point. if it's still the same then perhaps something is amiss?

does anyone else here have a dcup?

cheers

[Ade_Law]

UPDATE

3x short futaba HD extention leads purchased

cut in half

commoned up the pos and neg and soldered the reg direct into the bundle. The result is the power for the CCPM servos doesnt go near the RX, only the RX, gyro/tailservo/gov/throttle servo/carbsmart are powered from the rx.

same test, fingers under the swash and full positive pitch = squished fingers (ouch) and 8amp load.

Before mod,

V at reg 6.04v
V at RX (carb smart Y lead) 5.5v

after mod

V at reg 6.04v
V at RX 5.91v

thats better! Approx 7% voltage gain at max load

now to go and give it a good thrashing :-)

Ade

[Si_B]

It's in a Trex Nitro with a 3400 7.4v lipo reciever pack.

Tried stirring the sticks after I turned off, and I don't get anything. As soom as I switch off the switch on the align BEC, that's it.

[mattie-lodge]

I've just fitted a dc-up just to be safe, but no matter where I connect it i.e directly to the reciever or via a 'Y' lead, once I switch the power off I get no surplus control of the servo's (people are saying that they get 2-3 seconds before the reciver powers down).

Mine continues for about 2-3 secs after pwr down. It says it should do that in the instructions that come with it. Last paragraph.

Matt