High pitch noise from DJI motors

AndyPG

AndyPG

Member
Hi Everyone,
Hope someone can assist with my newbie concern.
I've been flying Hubsons and Symas for some time now and have just made the leap to a TBS discovery with bog standard DJI 2216 920KV motor/E300 ESC pack as supplied by one of the main UK Multirotor specialists.
It flies great but I'm experiencing an electronic high pitched tone which seems to be emitted from the motors while hovering.
Worse than that, it is very prominent on my filming audio.
I'm not being too critical here but it is fairly loud and quite annoying.
I have looked at many youtube vids of Quad video and I can't hear it on other people's aircraft.

Has anyone come across it before and know what I can do to reduce/stop the noise.
I don't want to overlay every video I make with music.

If anyone would be kind enough to check out this youtube clip I made, you will see/hear what I mean.
The whistling noise is a little more prominent than it sounds on the clip.

Is this normal for this motor? Are other motors quieter?

Many thanks, Andy.

 


C

cootertwo

Member
I've not yet decided what causes that noise, but it's not all that un-normal. Some of my quads whistle, others don't. Some say it's the ESC's, some say it's the motors, some say it's the props. I believe it to be a sync problem, between the ESC's and the motors/props. Only thing I could suggest, would be to re-calibrate the ESC's to your radio. If nothing else, the tone will probably change.
 


AndyPG

AndyPG

Member
cootertwo said:
Only thing I could suggest, would be to re-calibrate the ESC's to your radio. If nothing else, the tone will probably change.
Click to expand...

Thanks cootertwo, I think these motors are pre-calibrated to the esc's so I'm not sure if there even is a calibration procedure. I'm certain the noise comes from the motors.
I'm starting to get used to it though.

Thanks,
Andy.
 

AndyPG

AndyPG

Member
ovdt said:
I hear a bearing noise, you should inspect the motors; you might wanna change the bearings.
Click to expand...

Thanks ovdt,
They are brand new and the bearings are perfectly smooth and quiet.
It's an electronic sound, not mechanical.

Andy.
 

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