Splitting servo load in a Berg7 ???

[G.P.]

Hello,

I am setting up a twin otter at the moment that is going to have at least 7 HS65 servos and will be running on 4 cells. I know that I could just run a CCBEC, but that seems like a waste (and extra weight/wiring) since the two esc's that I'm running have built in switching BEC's. Unfortunately 7 servos is too much of a load for one of these built BEC's, but will work fine if I could some how split the servo load between the two BEC's.

I'm wondering if there is a spot on a Berg 7's circiut board where I could cut a copper trace and split the positive servo bus into two? In my mind this would allow me to plug one esc into channel 3 (like normal) to power half of the servos and plug the other esc into channel 7 to power the other half of the servos.

Am I out to lunch on this theory?
Greg

[lestingoy]

Sounds like an expensive experiment to me. 1 CC BEC is 21.00.

Problem solved.

:)

[G.P.]

Sounds like an expensive experiment to me. 1 CC BEC is 21.00.

Problem solved.

:)Thanks.

[turbored21]

why not just go ahead and run multiple receivers.. ailerons on one rx elevator rudder on the other seems to me thats what all the large scale guys do and it works wonders for them..

[G.P.]

I was thinking about doing that too. I'm trying to make it as light as possible though (for scale looking slow flight and stol) and would love to save the weight if possible. I do like this option more than the external BEC. I'm trying to avoid going that route because the cabin is already going to be a mess of wires and I would like to avoid adding more clutter.

[turbored21]

lol well not that itll matter much but a second receiver would weigh 9g more.. a CC bec would weigh 11

[G.P.]

Adding ANY weight seems like such a waste when I already have two switching BEC's onboard.:(

[tadawson]

Seems like a pretty low risk thing to try to me . . . find which PCB trace carries power, and cut it . . . . if what you did didn't work, repair it . . . pretty bonehead simple, at least from where I stand . . .

- Tim

[Andy W]

For a large-scale model, it is common to run the signal from the Rx to a board with a heavy-duty bus - the regulators used can typically be run in parallel. ServoCity sells a nice one - http://www.servocity.com/html/servo_power_boards.html
..a

[G.P.]

Thanks guys.

That looks pretty cool Andy, I've never seen that before. After looking inside an Electron six and a Berg7 I think it would be easier to cutt a trace on that and divide the power between the two BEC's. It also wouldn't add much weight if I put it in the right spot since I am going to need extensions on everything anyways.

Thanks for the idea,
Greg

Edit: Just realized I could just plug half of the servos into the board and the other half into the Rx - problem solved and I will be able to make a nice neat install. with minimal weight gain. Thanks!

[Andy W]

I would be very reluctant to tamper with the Rx, in case it ever needed service. I lightened my board by only running the signal wires to it for the bulk of the channels.
..a

[G.P.]

I would be very reluctant to tamper with the Rx, in case it ever needed service. I lightened my board by only running the signal wires to it for the bulk of the channels.
..aI was thinking about doing that too. Plus I could probably eliminate half of the leads and half of the board itself since half the channels will be plugged directly into the Rx. Thanks for showing me a great product!