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Today i tried to spin my drive by hand couldn't hear any knocking tough. Also wen spun by the stepper the knocking seems to just went away. All it makes now is a gentle grinding noise, its a bit...

https://youtu.be/XhlZheT1fu0

Hello, i recently got a 4th Axis harmonic drive for my diy mill. It works totaly fine but makes some strange knocking noise when spinning in one direction (clock wise...