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Old May 31, 2008, 01:04 PM
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Raleigh, NC
Joined Mar 2008
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Servo Twitching! Bad ESC?

I burnt up a motor due to excessive heat casued by a loose magnet. The ESC did get real hot, because it melted loose from the hot Glue holding it on. I replaced the motor, and not I git the wierd twitching of the servo and motor as soon as I power on the transmitter, but it stops after I cycle the controls.

I'm just wondering if the ESC is damaged. I dont want to find out at 300ft. Anyone ever seen an ESC causing twitching?

Also the reciever was involved in a crash, but it was not even scratched, so I dont think thats it.

Please help
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Old May 31, 2008, 01:54 PM
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Hopalong X's Avatar
Grafton, Il
Joined Nov 2007
1,913 Posts
TX is first on last off!

You should be turning on the Tx BEFORE plugging in the airplanes batterry.
There can't be twitching of servos etc. when you turn Tx on if there is no power to the plane.
Turn Tx on.
Then plug battery into plane.
Let us know what happens then.
Mike

Also
Disconnect airplane battery 1st. Then turn Tx off when finished.
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Old Jun 01, 2008, 12:53 PM
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lawton,ok
Joined Dec 2007
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[QUOTE=Hopalong
Also
Disconnect airplane battery 1st. Then turn Tx off when finished.[/QUOTE]

hopalong , of course, is right, and you probably are aware of that, but from my experience, it COULD be an esc problem. Al
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Old Jun 01, 2008, 01:23 PM
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thewz's Avatar
Temecula
Joined Jul 2004
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As others have said always turn on the Tx first. That'll cure a lot of the initial twitches.

If it is still twitching there are a number of things:

You are getting interference
Your Rx crystal is loose
Your Rx is bad
Your ESC's BEC is not providing the correct current (or one of your servos is damaged or binding)
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Old Jun 01, 2008, 06:11 PM
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Raleigh, NC
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Quote:
Originally Posted by thewz
As others have said always turn on the Tx first. That'll cure a lot of the initial twitches.

If it is still twitching there are a number of things:

You are getting interference
Your Rx crystal is loose
Your Rx is bad
Your ESC's BEC is not providing the correct current (or one of your servos is damaged or binding)
Shouldn't I not get interfernece on a 2.4ghz system?
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Old Jun 01, 2008, 06:25 PM
"It's a Quad" :O
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Temecula
Joined Jul 2004
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Quote:
Originally Posted by Hemmi
Shouldn't I not get interfernece on a 2.4ghz system?
Well...I didn't know that....

So that rules that out and a bad crystal.

Are any servo's binding?

Try pulling the red wire from the ESC (don't cut it just pull up the little plastic tab and slip it out of the plug. Now use a regular onboard Rx battery (4 AA cells) to power the system. This will ruleout the BEC.

You may want to rebind the Rx if the above test produces no different results.
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Old Jun 01, 2008, 08:05 PM
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United States, CA, Alpine
Joined Oct 2007
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No, no. 2.4ghz systems also get interferance, just read some of the threads on the manufacturers pages. Also, just be sure to turn your radio on before you turn your plane on. Visa versa when you turn everything off.

And did you bind the receiver too?
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