New featherweight (DMBLBIT)

[JamesDavies]

Almost finished putting together a robot that's been in parts for many years. Just got the gears lining up correctly.

http://imgur.com/SeWs6cf

Having a little problem with the electronics which wasn't happening yesterday: when I power up the fuse for the right electronize blows. I cant see any shorts- any ideas what might be causing this?

Cheers,
James

[mrsam]

Are you using an external BEC or RX battery?

[JamesDavies]

No rx battery- so I guess yes to the BEC (sorry, I'd never heard that term before).

[mrsam]

I meant an external BEC, the one on the Electronize looks like it's connected so if you were using an external one as well that could cause it to blow i believe.

[JamesDavies]

I'm sorry- what is the BEC? The Rx is powered only by the electronize- I've not put anything else on to power the Rx.

[Mega Masher]

Battery Eliminator Circuit
It supplies power to the receiver and nothing else
(Correct me if I'm wrong)

[mattsdragons]

The orange and yellow intertwined wires are the BEC, this powersw the RX yes. I can't tell from the picture but you only need one of these connected, if both have them connected you will overpower the circuit, just cut one of them and tape the ends off

[mrsam]

Exactly that John, it's the two wires (orange and red) that are twisted together, actually looking at your picture again are your rc wires plugged in correctly? the signal (white) should be on the front of the RX.

[JamesDavies]

Only one of the electronizes has the BEC, and it isn't plugged into the Rx (is it meant to be? The Rx is still getting power).

I noticed that the red and orange wires are making contact- presumably this is not desirable?!?

[mrsam]

The wires are supposed to be connected if you are using the BEC on the Electronize because that's the circuit, what i meant was other than the Electronize BEC are you using an alternative external BEC?

[JamesDavies]

connected to each other? Yeah, as far as i know thats the only thing powering the rx- no batteries or anything else...

[Max]

Are those 15A electronizes? And what are those motors? They looks quite powerful so could be easily drawing more than 15A so blowing the fuse. They may not have blown yesterday if the gears where not connected as this will add a lot of extra resistance so the current draw will be higher so the fuse will blow. What is the rating of the fuse?

[mrsam]

20a on the fuse from what i can see, might be exactly what Max is saying and the motors are drawing too much current, it might be worth investing in some huger rated esc's.

[JamesDavies]

the fuse blows as soon as the battery is connected. Before the motors even turn.

Fuses are 20A

[JamesDavies]

motors are feather golds and i had one running under load yesterday. Like i say, now I cant get them to run with no load at all.