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Old Jul 20, 2009, 10:20 PM
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niner555's Avatar
Memphis, TN
Joined Jul 2006
245 Posts
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Loosing sync on a Turnigy SK Series 42-60 500Kv motor

I just received this motor (Turnigy SK Series 42-60 500Kv) and have been having some problems. At 3/4 throttle or above, I am getting terrible screeching and massive vibration from what appears to be a motor sync issue. Slowly bringing up the rpm's to this point, the motor/prop is butter smooth...hit about 3/4 throttle and the motor goes nuts.

Set-up:
8S, 2200mah
CC HV45 ESC
8.75 x 10 prop

I have tried 3 different prop adaptors just to make sure it wasn't a balance issue. The cut-down prop I am using has been run up to 13,600rpm with a gearbox set-up, so I know the prop has no balance issues.

I also tried one of my cheapy Suppo 70amp ESC's and it didn't help/change the problem either.

I have tried every imaginable combination of timing and frequency with both speed controls. While the vibration/sync issue varies in it's intensity with changes in the timing, nothing seems to cure the problem.

Anyone have any ideas what I can try at this point?

Thanks,
Matt
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Old Jul 20, 2009, 11:28 PM
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O. C. CA
Joined Jan 2005
815 Posts
Did you program the timing on the esc for this motor?

Himeros
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Old Jul 21, 2009, 06:05 AM
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niner555's Avatar
Memphis, TN
Joined Jul 2006
245 Posts
Yes.....

"I have tried every imaginable combination of timing and frequency with both speed controls. While the vibration/sync issue varies in it's intensity with changes in the timing, nothing seems to cure the problem."

Matt



Quote:
Originally Posted by himeros
Did you program the timing on the esc for this motor?

Himeros
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Old Jul 21, 2009, 06:45 AM
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Challenger 413's Avatar
Dickinson, Tx.
Joined Sep 2004
5,360 Posts
Drop voltage down a cell?

Challenger413
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Old Jul 21, 2009, 08:50 AM
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indiana
Joined Nov 2007
32 Posts
Check the magnets.
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