Quote:
Originally Posted by humfrz
Yaaaaa.........Jesse36m3 fixed it ........ 
Confirmed by @ Ultramaroon ...... so, it must be right ...... 
Yep, I checked mine and it does it too ....... but not nearly THAT loud ...... 
humfrz
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I've heard some really sing, none of which have failed. The reason I suggested slowly stepping on the throttle while listening is to demonstrate how the whole servo system goes into and out of resonant peaks many times throughout its travel. This is due in part to natural hysteresis of the gearbox between the motor and the position feedback encoder.