No power to heli

dnipper · Posted: Thu Oct 18, 2012 1:56 pm Post subject: No power to heli

When I plug a battery into the helicopter I get no tone or movement from the servos. I have charged the batteries and have tried several batteries that I have used before.
I have changed speed controllers with no success.

Does anyone have any ideas that I can check?

Thank you,
David

matelot · Posted: Thu Oct 18, 2012 3:01 pm Post subject:

You haven't mentioned the receiver. That's the key piece if you're sure the batteries are 100%. You could also try a servo tester - direct link to 4.8v supply.

Are you sure your transmitter is working properly?

dnipper · Posted: Thu Oct 18, 2012 3:18 pm Post subject: no power to heli

The transmitter works with my SR120 and all of my airplanes. I did not change the receiver yet. I rolled the dice and bought the speed controller first. Not sure I want to put more money in the 350. I might just break down and buy a new one instead.

Thanks for replying back so quickly.
David

dnipper · Posted: Fri Oct 19, 2012 3:32 pm Post subject: no power to heli

i bought a new receiver yesterday and pluged it into the new speed controller and it did not power on. I'm not sure what to do next.

Any suggestions?

tombo242 · Posted: Fri Oct 19, 2012 6:05 pm Post subject:

Hi David,

I'm not sure exactly where you are at here:

Are you saying that there is no power to the Rx?
If so then it has to be the ESC not providing it. You say you have changed the ESC. It might be worth trying the Rx with a battery pack instead of the ESC output.

Or is the Rx not binding to the Tx? That is a different matter entirely, we need to know what you're doing here.

Finally is the power getting to the ESC in the first place?

We need more explicit info in order to help further.

Tom.

dnipper · Posted: Fri Oct 19, 2012 7:16 pm Post subject: No power to Heli

I put a vote meter on the ESC wire going to the receiver and I think I am getting 9 V. But the light on the receiver is not on or blinking or anything.

I have tired 2 ESC's, the original one and a new one I bought last week and both show 9 V on the wire going to the reciver.

How can I try the receiver with a battery pack?

Thanks
David

tombo242 · Posted: Fri Oct 19, 2012 11:01 pm Post subject:

9V seems very high, voltage is usually not much over 6V, if that but I don't know your heli, however most Rxs and servos work off no more than 6V. 9V could be enough to burn the Rx and servos out.

The BEC (Battery Eliminator Connector) section of most ESCs is rated at 5.5V, if yours is giving 9V there is something very wrong somewhere. It needs checking against a known voltmeter.

This may seem stupid but have you got the connector in the right way up? It's an easy mistake to make and I'm sure that most of us (if not all) have done it at some time Shocked

.

To use a battery pack, I have 4 rechargable AAAs and an old servo lead.
Here's how I made it

Click for full size.

Hope this helps some.

Tom.