HELP, bec? maybe blown rx channel.

[joely]

Hey guys, i have a problem. To day i put my bec in it all worked fine for a while but now my steer servo wont work in its channel... it works in the throttle channel so im thinking i've blown the channel in my receiver :(

Can anyone shed some light on my situation

[Charlie-III]

Sounds like a dead RX channel.

What radio?
What voltage was the BEC set to?

I would double check the trims & EPA's on the TX for the steering channel, make sure you didn't bump something.
Do you have another RX to try out?

[joely]

Originally Posted by Charlie-III

Sounds like a dead RX channel.

What radio?
What voltage was the BEC set to?

I would double check the trims & EPA's on the TX for the steering channel, make sure you didn't bump something.
Do you have another RX to try out?

Yeah thats what i thought.

Its just shitty hsp radio
Voltage is at 6v 10a

And yeah i checked all that before i even posted ;) and nah i dont have another RX to test it, got a new one on the way already though

Hopefully ive just killed the RX not the ESC :S

Gunna wire the BEC directly to the servo next time.

[DudeWalker]

10 amps to a receiver?

[joely]

Yeah i know, i now realise that was stupid im really not good with electrics

[Charlie-III]

Originally Posted by DudeWalker

10 amps to a receiver?

Ummm......the servo will only draw what it needs (of course, if it stalls the load goes up). A smaller servo won't draw anything too high, but some RX's are voltage limited. I would think 6volts and low draw should be fine for most RX's.

BTW, was the ESC to RX red wire removed when the BEC was plugged into the RX? It should be, you DON'T want 2 power sources feeding 1 RX.

[DudeWalker]

Oh, OK. I was thinking 10 amps was high because most internal BEC are like 2-3 amps. Thanks.

[joely]

Originally Posted by Charlie-III

BTW, was the ESC to RX red wire removed when the BEC was plugged into the RX? It should be, you DON'T want 2 power sources feeding 1 RX.

Sure was. Still went pop, so dunno what the go is. Anyways needed a new RX/TX anyway, this time im gunna put a reciever bypass adapter in. That'll fix it.

[Charlie-III]

Originally Posted by joely

Sure was. Still went pop, so dunno what the go is. Anyways needed a new RX/TX anyway, this time I'm going to put a reciever bypass adapter in. That'll fix it.

What servo are you running? If it's under ~200inoz, the draw should be low enough to run with the ESC BEC or the external BEC run through the RX.

I always prefer to run the external BEC direct to the servo though. The bypass makes it easy, I have my own way that is very small and requires no cutting or soldering (like the bypass).

Also, make sure to check your steering EPA's so you are not binding the servo and drawing high amps.

[joely]

Ummm no idea what the servo is. Its a stockie, think its a 9kg or something, yeah i wanna run it direct, the only other servo ill ever run is maybe a shift servo so that'll just run off the internal BEC seeing it doesnt need all the much power. The only reason i've put the BEC in is mu servo started to get twitchy about half throw after i put my 3s in, more amps cured it when i just had the BEC running by itself but killed the RX after not long, so new RX/TX and a different way of wiring and ill be all good i hope.

[The Violator]

You could try bypassing the RX and wire the servo directly to the BEC, just leave the signal wire to the RX. I have a futaba rx that has a bad power connection on it, I still use it, just bypassed the power connections. It might be a cheap solution for now. And if it does not work, you will have the wiring done for your next radio. Hell you probably could test it by connecting the esc to the steering output on the rx. turn everything on and then slowly turn the radio to see if the esc reacts. Then if it does rewire the bec to the servo. Otherwise, a new radio is in your future. FYI, I run 8 volts through my futaba rx on all my cars without issue. The one bad rx I have came with the radio in trade. If your in the market, you can never go wrong with futaba.

[tocsin]

Great idea with the ESC in the steering port as it's self powered. If it'll calibrate on the steering port, only the BEC is dead on that port.

When I'm running BEC through the receiver, I will pull the red and black pins from the ESC plug, tape them off, and plug the BEC red and black pins in their place on the ESC plug. That way the ESC's internal is isolated with only the signal wire running to the receiver, and the BEC isn't using an extra port or a Y connector.

[joely]

Yeah i've tried that too. Throttle ch works, steer ch doesnt, still not 100% sure i havent killed my esc though.

[Charlie-III]

Originally Posted by joely

Yeah i've tried that too. Throttle ch works, steer ch doesnt, still not 100% sure i havent killed my esc though.

If the external BEC is disconnected, but the RX works, the BEC in the ESC is working.

[joely]

Originally Posted by Charlie-III

If the external BEC is disconnected, but the RX works, the BEC in the ESC is working.

Just tested that and, on nicad i get a flashing light and nothing at all on lipo
Can this be fixed in some way? Or just get another ESC? its only $30 for another hobbywing
Another question. Can i use a serial Y to power the bec or should i hardwire it?

[Charlie-III]

Originally Posted by joely

Just tested that and, on NiCD I get a flashing light and nothing at all on LiPO
Can this be fixed in some way? Or I just get another ESC? It's only $30 for another hobbywing.
Another question, can I use a serial Y to power the BEC or should I hardwire it?

Sounds like the ESC LVC is hit by the LiPO....remove the LVC setting and both packs should work.

[joely]

Originally Posted by Charlie-III

Sounds like the ESC LVC is hit by the LiPO....remove the LVC setting and both packs should work.

Nah its not that. Put me voltmeter on it and every cell is about 3.7 and my voltage cutoff is set at 3.2.

Any other ideas?