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Old 08-31-2011, 03:57 AM   #1
mxaexm
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Default Brushless motor stops spinning, makes noise

Hello,

I'm new to electric RC flying and now I'm having problems with my electric motor.

I have Eflite 480 with Turnigy 40A ESC (plush or sentry), Turnigy 3S 2200 lipo.

Sometimes, my motor stops spinnng and makes a weird high pitch noise. It almost looks like the prop doesn't know which way to spin....

Please let me know if you have any ideas of what I can do to get it fixed...or should I simply buy a new motor.

Thank you in advance.
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Old 08-31-2011, 04:23 AM   #2
cyclingsarge
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Had similar problem a couple of times. It could be a loose magnet, unbalanced bell, poor electrical connection.

First test electrical connections. Use a continuity gauge. It's a probe with a sharp pointy end and a alligator clip on the other. Usually needs a AA battery. What you do is connect the clip on one end of the circuit and use the probe to test for current. If the connections are good the prone will light up. I recently received a floatr jet from HK with motor and the motor sputtered and didn't seem to know which way to go. Come to find out the bullet connector on one of the leads was not letting current transfer to the wire. So I removed the shrink tubing and heated the bullet with a pen torch to remelt the solder and that fixed it.
The loose magnet need some work and you can google or even search this group or RCU for fixing loose magnets. Same with balancing the motor bell. Good luck.

Several scratch built foamies, Maxi Swift, Swift II, FunCub, 3DHS AJ Slick 43", Great Planes SeaWind, and Mud Duck Cricket. I have also owned a 2 HZ Super Cubs, Eflite PulseXT 25e, and an Eflite Apprentice.
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Old 08-31-2011, 04:31 AM   #3
HeliScRapYard
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Make sure the motor shaft isn't slipping, and try adjusting your timing

Need More Glue!!!
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Old 08-31-2011, 03:07 PM   #4
mxaexm
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Thank you for your help. I will try to adjust timing. I think that my ESC is at default setting. I'm assuming that I should start with low timing and see how it goes from there.

I will report back.
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Old 08-31-2011, 07:02 PM   #5
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Had the same problem with a 32 size turnigy motor and 60 amp ESC. I changed the timing which is a programable function you will find on your ESC. You can use your transmitter to change. The highest setting on mine made the problem disappear.
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Old 08-31-2011, 07:05 PM   #6
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Originally Posted by crashandburn2 View Post
Had the same problem with a 32 size turnigy motor and 60 amp ESC. I changed the timing which is a programable function you will find on your ESC. You can use your transmitter to change. The highest setting on mine made the problem disappear.
thank you, I will change timing and see what happens....

Some people say to go with low timing, others say that high timing solves it.
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