Dual servos 1 bec help
 

Can I run my steering servo and my transmission servo off 1 bec? Link to a solution or a diagram would be great. Thank

Re: Dual servos 1 bec help
 

Depends on how you set it up prior. Set up as per stock, like the photo below, it should be no problem as the BEC is powering all the pins on the receiver.

http://www.castlecreations.com/image...ng_diagram.jpg

Re: Dual servos 1 bec help
 

Thanks man. I read way to deep into it. I just went through a random electronics failure that really sucked.

Re: Dual servos 1 bec help
 

Depending on the servos you are using 1 might not be enough, or if you have a high voltage servo for steering and a 6 volt servo for the trans or dig. If you have a high voltage servo for steering the best bet is to wire the cc bec direct to that servo and let the internal bec of the esc power the dig or trans servo. or you could run a cc bec to each and let the esc power the rx.

Re: Dual servos 1 bec help
 

You could use a single external BEC for the steering servo
and a Holmes Hobbies RX by-pass adapter.

Does require reinserting the red + wire
coming out the ESC, back into the RX.
and that plugs into ch2.
assuming the ESC's internal BEC works and supplies enough voltage.

Then the shift servo could plug into ch3 (assuming you have one)
and draw it's voltage off the ESC's internal BEC
that is delivered to the RX.
ch3 will then control your shift servo.
I'll assume the shift servo doesn't require high voltage/torque to shift.

The external BEC no longer powers the RX
when using the HH's "Y" adapter.
It simply sends signal to ch1

And so the steering servo is powered
solely by the external BEC and whatever voltage that is adjusted to.

Re: Dual servos 1 bec help
 

Ok ok ok lol I have a savox 1230sg for steering, mmp, 4pls and a savox shift servo. I can't remember the model number. Running 2s lipo but have 3s on its way. Thanks for the help. I feel more confused and I really don't want to fry more electronics lol

Re: Dual servos 1 bec help
 

The simplest way (provided the 2 servos are running at the same voltage) would be to to plug everything into the RX and pull the red wire from the ESC.

Re: Dual servos 1 bec help
 

A single cc bec may not supply the needed amps for the power hungry Savox servos. They draw a lot. Worst thing is try it on one bec, and if it doesn't work add a second bec.

Re: Dual servos 1 bec help
 

I think I'll just wire my steering servo to bec as the directions state. Thanks guys!!!

Re: Dual servos 1 bec help
 

I'm running 2 Savox 1256TGs for a 4ws setup in my Losi night crawler off a single CC bec. no problems been running it for years like that.

Matt.

Re: Dual servos 1 bec help
 

The original CCBEC wiring method is not the best way IMO
Doing it that way, the servo can draw too much amperage thru the RX,
creating excessive heat/brown outs, that can cause premature RX failure.

A better way is as I attempted to type/explain previous.

That way the external CCBEC does not power the RX
and instead powers the S. servo directly/by-passing the RX.
Leaving the ESC's internal BEC (red+ to RX required) to power the RX *

Thus ensuring the RX isn't stressed or starved
due to the Savox servo's possibility of higher amp/load demands.

* most ESC's internal BEC's are usually a lower voltage 4.8v - 5.0v
and rarely cause harm to an RX
Excessive voltage/amperage to the RX is not good.
Tho' some RX's might handle that load... many won't.


It can be wired without the HH's "Y" by-pass adapter
But the HH's "Y" by-pass adapter makes it a 5 second job.

The HH's "Y" by-pass adapter looks like this...
easily worth the purchase cost and ease of installment...
especially if wiring things manually is confusing.

http://www.rccrawler.com/forum/holme...ers-stock.html

Here is a paint rendition posted up by: microcrawlers

http://i426.photobucket.com/albums/p...os%20wired.jpg

maybe looks like spaghetti to the untrained eye...
But it is basically the same principle as utilizing the HH's "Y" adapter.
Tho' wiring it manually will be a lot more difficult, tedious
and should be attempted only by those whom have a basic understanding.

Just omit the 2nd steering servo
as you're not utilizing 4WS that I've read.

Of course you can do it any way you like...
but realize you may have more electrical issue
later down the road.
And I thought that's what you were wishing to avoid ?

Re: Dual servos 1 bec help
 

the 1256 is not a 1230... not even close.

1256 = 277.2 oz/in @ 6v

The SA1230SG = 500 oz/in @ 6v
and it's higher amp/load on an RX can be cruel.

Re: Dual servos 1 bec help
 

Correct "thumbsup"

I've bypassed the RX with my own home made H adatper.

I would run the 1230 off the BEC and the shift Servo off the ESC as tacocrawler described.

Re: Dual servos 1 bec help
 

As soon as I get a change password email I'm ordering the y adapter. I'm fully capable of cutting and soldering etc but that adapter is the bees knees. I prefer my wiring to be as neat, clean, functional and easily reversed or maintainable as possible. Thank you guys. I appreciate the help

Re: Dual servos 1 bec help
 

...good for you "thumbsup"

tho' I'll guess you might already know

HH's also offers another by-pass that includes
an additional Aux. lead if that's of any interest.

only $ 1.50 more
so thought it should be noted here
in case anyone else is looking/needing.

Holmes Hobbies LLC

Re: Dual servos 1 bec help
 

I did see those. I should of ordered one just to have. Who knows what my next build will need lol

Re: Dual servos 1 bec help
 

Here's my HH's RX "Y" by-pass set up...


http://i1191.photobucket.com/albums/...pssljjhqg9.jpg

Re: Dual servos 1 bec help
 

Thanks man! That looks as easy as I envisioned. Glad you guys pointed out these exist