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Old 06-12-2014, 04:33 PM   #1
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Default osilating Motor

I have a motor that when I throttle up the motor sits there and goes forward and backwards what could be the problem
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Old 06-12-2014, 06:44 PM   #2
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Nine times out of ten it's a bad connection or bad solder joint on one of the three bullets between motor and ESC.

Other less common causes are a motor lead that's broken under the insulation, or burned out winding, or a faulty ESC.
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Old 06-17-2014, 08:24 PM   #3
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Originally Posted by JetPlaneFlyer View Post
Nine times out of ten it's a bad connection or bad solder joint on one of the three bullets between motor and ESC.

Other less common causes are a motor lead that's broken under the insulation, or burned out winding, or a faulty ESC.
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Old 06-17-2014, 09:09 PM   #4
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Egrave, is it really going forwards and backwards, or just pulsing the power? If just pulsing, then JPF is probably right. If really going fwd/reverse, it probably needs to be exorcized!
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Old 06-17-2014, 10:43 PM   #5
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Ive seen the forward/reverse thing quite often with bad connections. How it behaves seems to depend on how bad the connection is.

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Old 06-17-2014, 10:52 PM   #6
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Don't play with throttle when this occurs, you may burn motor and/or controller.

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Old 06-17-2014, 11:03 PM   #7
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Originally Posted by ron_van_sommeren View Post
Don't play with throttle when this occurs, you may burn motor and/or controller.
Excellent point Ron. The current will go through the roof whenever the motor isnt spinning.

P.S. I almost didnt recognize you Ron! You lost the hat!

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Old 06-17-2014, 11:18 PM   #8
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Originally Posted by Larry3215 View Post
... P.S. I almost didnt recognize you Ron! You lost the hat!
Not the only thing(s) I have lost since my previous picture was taken On the bright side, I gained a bit of forehead

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Old 06-18-2014, 01:23 AM   #9
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Originally Posted by ron_van_sommeren View Post
Don't play with throttle when this occurs, you may burn motor and/or controller.
Here is where it might be a good idea to temporarily wire in an automotive fuse between the battery pack and the ESC. Typical fuse size would be about 30 - 50% of the ESC current rating.

That way, if your malfunctioning setup is really pulling a lot of Amps, you'll hopefully blow the fuse, not the ESC.

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