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Old May 07, 2005, 05:06 PM
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Joined Nov 2003
176 Posts
How to Balance a Brushless Rotor ?

Hello All,

Just curious as to how one can balance the rotor on a brushless motor?

Thanks
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Old May 07, 2005, 07:24 PM
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Canada
Joined Nov 2000
6,983 Posts
No different than balancing an Armature..use a magnetic balance and add or remove weight as needed..... except... often the Magnets are plated and removing metal is destructive/fatal to the Mag structure :-)
Are you absolutely sure balancing is even necessary??
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Old May 07, 2005, 08:16 PM
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Dade City, Florida
Joined Feb 2005
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That is what I was thinking. If the rotor is not balanced, unless this is a self build, I would take it back.
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Old May 07, 2005, 10:39 PM
X-Era Motors
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Newport, NC
Joined Jan 2002
2,225 Posts
I would definately only add material to balance the rotor, but only a badly made rotor would need balancing. On brushed motors, it's hard to get the coils exactly the same so they require balancing. On brushless motors, balancing can usually be omitted.
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Old May 07, 2005, 11:59 PM
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Well, I am new to the brushless business and after crashing my plane, the motor's can got separted so I started searching for info here. Some one here on this forum said that he had to rebalance his rotor after he crashed, so I thought I might have to rebalance mine too. But it seems like its not required. I would just put the motor back as is and see if it runs ok. I hope there wont be any issues with it. Thanks for all the info though.
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Old May 08, 2005, 12:15 AM
X-Era Motors
DavidB.'s Avatar
Newport, NC
Joined Jan 2002
2,225 Posts
If the "can" spins true when you run the motor, then I wouldn't worry about anything else. If it wobbles much, try to straighten it first. This is a standard cd-rom motor right?
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Old May 08, 2005, 02:44 AM
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DavidB. : This is Align 400L brushless. So I assume I shouldn't worry too much about balancing it.
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Old May 08, 2005, 03:17 PM
X-Era Motors
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Newport, NC
Joined Jan 2002
2,225 Posts
Hmm, if it runs true then don't worry about it. If the shaft is bent, get it replaced, but other than that I don't think there is much you can do to fix an align motor.
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