I got some FXR ecs problems

[Ola]

Hi

I`ve bought 2 new FXR`s for my crawler at towerhobbies, and just got them in..

Innstalled in a Axial XR10 MOA crawler, with 2 brand new Team Brood 45t motors, on a fully charged 3s lipo.
BEC is used, so the red wire is disconnected from the esc-rx plug.
Tx/Rx is a brand new Futaba 4pks with its following Rx..

When I connected the battery, I got some lights in led`s but no chime.
Servo reacts, so tx/rx must be linked ok.

When I hold “mode” for 3 sec, I get to calibrate neutral, forward and reverse.
When done, LED 1-3-5 blinks constantly, and nothing more happends.. no chime, no nothing..
Servo still works great, and I got my green light on the Rx as shows good link tx/rx.

Can anyone give me som hints where to go from now?

Ola

[Ola]

Oh yeah, and i`ve tried another Rx as well..

Same results..

1-3-5 blinks right at startup, no chime.

[SMR 510RR]

1 3 5 is "battery cutoff set below pack voltage" so check what you have your cutoff set to.

If it calibrates correctly then I dont think there is a problem with the ESC and rx communicating so I think some ESC settings must be wrong.

Cuttoff for a 3s should be 9v or a little higher to be safe.

[Ola]

You where absolutely correct sir

I set Lvc to "off", and things changed ALOT ;)
Now everything works fine, and motors are running..

But the strange thing, my lvc was set custom, to 9,6v..
The 1050mah 3s lipo, measures 12.4v unloaded on the table..

This makes little or no sense to me..

[Ola]

With the Lvc set at "3" , which i would believe is 9v, everything still works fine..

Strange that 9.6 wouldnt work out.
Battery voltage is doublechecked ofcourse.

[SMR 510RR]

Did you set the custom voltage from the hotwire? I think I have mine set at 9.6 and it works fine.

[AreCee]

Custom voltage can only be set via the Hotwire and when setting the voltage it is per cell so the custom set would be 3.2 volts.

[Ola]

yup, was done with Hotwire..

Oh man, that explains it all, setting it pr cell..

I was SO sure it was total voltage, as my old RX8 was only set for total and not pr cell.
That would explain it all..

I`ll adjust it tomorrow, when i also gotta change some other things..
It`s to rough at slooow startup also, so i`ve gotta play with some settings i guess.

[SMR 510RR]

Yea that is what I thought although I am too lazy to hook it up to see. hahah

The startup issues are typically due to an older firmware, update that and it will be smooth as butter!

[Ola]

Updated the ECS`s from v028 to v030, and now it runs supersmoooth

alittle sceptical to set LVC to 3.2v, but i will drain a battery down to 3.0v now and test with 3.5-3.6v setting, to elliminate any doubt

My manual say to set total voltage, so i just want to go the safe route..

Thanks for all youre help!

[Randy P]

The fxr's custom low voltage cut off is NOT per cell. It's total voltage. If yous isn't working in this manner you should make sure of your BEC wiring. If the FXR is picking up the BEC voltage it may do exactly what it's doing.

[SMR 510RR]

How could it pick up BEC voltage unless you had your BEC wired to supply power to the ESC I dont see how that would be possible.

I cant remember, I would trust the manual though about per cell or total voltage. I know castles are per cell but they have their auto cutoff that detects the size of pack when you plug it in.

I guess plug in your pack and check the voltage at the solder posts to verify that you are sending full voltage to the FXR. If you are and the correct LVC setting doesnt work properly then it may be time to call Tekin and see what they say.

[Ola]

Yup, i`m in some conversation with tekin support on email now.. They are helpful

It could be something with the BEC.. But i have no clue what.

I have my battery conected directly to both ESC, and the BEC is soldered onto these posts on one of the ESC`s.
From there, the bec goes straight into the Rx.
The red wire from ESC, is cut away and isolated from the plug that goes into the Rx.

When lvc is set at 3v setting (level 3, none custom), everything works fine..
Battery show 2.95v-3.0v-3.1v when the FXR`s lvc cut`s in.

[Charlie-III]

Originally Posted by Randy P

The fxr's custom low voltage cut off is NOT per cell. It's total voltage.

+1, the FXR is PACK VOLTAGE, not per cell voltage..... manual here, read page-2 left side... http://www.teamtekin.com/manuals/FXManual.pdf

[Ola]

Yeah, that`s what i`ve learned as well now..

I`ll do some testing agan, and see what i can find..
Right now it`s just to fun to drive

[AreCee]

OH-OH my bad. It does get confusing with all the different protocols all the products use.

To be honest, I haven't even looked at my FXRs since setting them up which was in January.

[rcscaler]

lol...I have not noticed this problem yet.
so, did u guys set 9v or 9.3v for 3s lipo?

Originally Posted by Charlie-III

+1, the FXR is PACK VOLTAGE, not per cell voltage..... manual here, read page-2 left side... http://www.teamtekin.com/manuals/FXManual.pdf

[Charlie-III]

Originally Posted by rcscaler

lol...I have not noticed this problem yet.
so, did u guys set 9v or 9.3v for 3s lipo?

I think I use 9.3VDC in case one cell drops a little faster than the others it won't go too low......

[SMR 510RR]

Well 9.3 is only 3.1v per cell. I would set at 3.2 or 3.3 per cell just to be safe. At that point you are not really sacrificing any runtime as voltage drops off quickly at that level compared to 4v.

So somewhere between 9.6-9.9v would be good in my eyes.

[Charlie-III]

Originally Posted by SMR 510RR

Well 9.3 is only 3.1v per cell. I would set at 3.2 or 3.3 per cell just to be safe. At that point you are not really sacrificing any runtime as voltage drops off quickly at that level compared to 4v.

So somewhere between 9.6-9.9v would be good in my eyes.

I will not disagree.....I'm a bit of a distance from my rigs to say for sure......I will NOT go for the minimum though......