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Problem with power dropping...

Old 06-09-2007, 08:20 PM
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Default Problem with power dropping...

Any ideas? New helo, 450SE V1 came with a 3550kv, Aligne 35? speed control, and Align 20c 2000mA battery... I've had the power shut off 3 times. Twice while hovering and today while in FF. It's not a glitch, I have full control. The motor looses all power and then after a half second comes back. Happens after the first couple of minutes of flying so it's not a dead or low battery. I've had no problem as it happens so fast it doesn't really do much other than scare me... any ideas? Speed controller? All connections are tight and if it was a glitch or reciever I'd be able to tell from the other channels.
Old 06-09-2007, 09:49 PM
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Default RE: Problem with power dropping...

Maybe the ESC is programmed for high voltage battery cutoff protection. Reprogram it to low voltage cutoff, and time your flights.
George
Old 06-10-2007, 07:22 AM
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Default RE: Problem with power dropping...

It's happening at the begining of the flight though. I keep flying and it doesn't happen again.. Anyone been having problems with the align SC?
Old 06-10-2007, 07:33 AM
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Default RE: Problem with power dropping...

Align Speed Controls are great(IMHO). I would try another battery and/or do as George1234 says and reduce the cutoff voltage.
Old 06-10-2007, 09:17 AM
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Default RE: Problem with power dropping...

Thanks...
Old 06-10-2007, 09:54 AM
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Default RE: Problem with power dropping...

I have this problem with one of mine, too. It doesn't matter what lipo I'm using. At first I thought it was because I switched to the 430XL motor, but when I put the stock motor back in it did it too. I have 5 TP 2070 extreme packs so I know its not the battery. The default programming on the esc is med votage cutoff. I'm going to reprogram mine for low. My other 450SE has never done this. I think its just that particular speed control.
Old 06-10-2007, 10:26 AM
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Default RE: Problem with power dropping...

Make sure you time your flights though! I think the low voltage cutoff point may be a little too low.

George
Old 06-10-2007, 10:51 AM
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Default RE: Problem with power dropping...

I had this problem when I had a lot of drag in the drivetrain. Make sure the T/R belt is not too tight and that the rotors turn freely.
Old 06-10-2007, 10:59 AM
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Default RE: Problem with power dropping...

Thanks guys. I always fly very conservative flight times. My drive trains are really free. Belt is plenty loose, bearing are lubed regularly. Belt and main gear are treated with silicone spray. That'a a good point, though. Lots of problems come from to much drag in the system.
Old 06-10-2007, 11:05 AM
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Default RE: Problem with power dropping...

Mines used to do that once in a while. I killed myself looking over my settings and ESC programming to find the gremlin. Then one night I was taking the motor out to change the pinion and thats when it happened. One ont the wires came right out of the bullet connector. So I stripped the shrink wrap on the others and lo and behold I saw the problem. Apparently there wasn't enough solder in there to keep the wires in so they'd vibrate free. Resoldered all the connectors and it hasn't happened since!!!!
Old 06-10-2007, 11:35 AM
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Default RE: Problem with power dropping...

I guess it's time to pull test the connectors...
Old 06-10-2007, 12:01 PM
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Default RE: Problem with power dropping...

a ha! I never even considered that........
thanks for sharing!
Old 06-10-2007, 12:21 PM
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Default RE: Problem with power dropping...

I try to look for the simple answers first. But what usually happens is that I examine every complicated/expensive part first and work my way down.
Old 06-10-2007, 12:25 PM
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Default RE: Problem with power dropping...

ESC settings.....

It came defaulted to and I've been flying it with;

Brake disabled
High timing
Middle cutoff voltage
Helo soft start non-governor mode
Quick speed throttle response

I have it at this now;

Brake disabled
Mid timing
Low cutoff voltage
Helo soft start non-governor mode
Quick speed throttle response

Is this how I should have it? I am 3Ding and it is a SE V-1 with Hyberion carbon 325s and Align 3550kV and BL35XESC.
Old 06-10-2007, 12:54 PM
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Default RE: Problem with power dropping...

That's how I have mine set up, except for soft start. I have normal, airplane. But..........I'm pretty new to this electro-heli thing myself!
George
Old 06-10-2007, 04:21 PM
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Default RE: Problem with power dropping...

Evan,
I'm doing hard 3D too. As soon as I lift off its in idle up until I'm ready to land. Lots of thrashing and bashing before that. I have mine set the same way except mine at the moment is mid cutoff. I'll be changing it to low. I looked at my soldering and it looks fine. I think I'll try the low voltage thing before I re solder.
Old 06-10-2007, 06:54 PM
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Default RE: Problem with power dropping...

Still did it, need to check solder joints I guess... 2 different packs, the Align and a Hobbu Lobby "Twenty" 2150...
Old 06-10-2007, 08:45 PM
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Default RE: Problem with power dropping...

Have you tried lubing the belt yet to make it run smoother?

Had a similar problem on my T-Rex 600. Turned out the electrical gear was trying to draw more than the BEC could handle. Upgraded to the 6A BEC and haven't had a problem since. Your onboard BEC in your ESC may be bad. Align makes very high quality products, but the occasional bad item does get turned out.
Old 06-11-2007, 09:04 AM
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Default RE: Problem with power dropping...

If the BEC was bad then I would be loosing the signal to the servos and notice it there. I am loosing motor while maintaining radio control.
Old 06-11-2007, 02:43 PM
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Default RE: Problem with power dropping...

That's what I thought, too. It wasn't until it happened for more than a few seconds, that I realized I didn't have servo control.
Old 06-11-2007, 03:06 PM
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Default RE: Problem with power dropping...

I've read the throttle channel is the first to pick up interference. Try moving your ESC to Rx lead if you don't have any luck.
Old 06-11-2007, 03:54 PM
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Default RE: Problem with power dropping...

Hmmm... ok.. I did the pull test, all good...
Old 06-14-2007, 10:49 AM
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Default RE: Problem with power dropping...

OK, fixed it I think. First I re routed the lead from the ESC to the reciever away from EVERYTHING, no good, then I rerouted the antenna AGAIN, no good, Swapped out recievers... ahaa.. problem fixed.. for now. Yes I am running 72mhz not 2.4G...
Old 06-15-2007, 10:16 PM
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Default RE: Problem with power dropping...

Had the same problem as alienteabagger. The problem I had was the solder on the connector on the ESC side came undone in mid flight. It only destroyed my landing gear and shattered the stock plastic head. That gave me all the reason I needed to upgrade to an aluminum head. Learned how to properly solder all my connections and haven't had a crash since.

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