Have 6 Tiger Motors (MN4014) on a hexacopter.
This is when they are off.
When lifting one propeller tip, the motor gives a little knock-sound, on some motors.
Motors have been used over 20h.
Is it the bearings?
Is it normal? Is there a little play?
Something to worry about?
I know Tiger Motors should have their bearings changed after how many hours it was… 50-60?
How do I know a bearing is getting bad?
Hot motor? Any special sound when using them?