I sure would like to know why my KR210 L3100 from 2010 makes this strange noise when axis 2 is rotating.
At first, I thought it had something to do with the balancing piston so I injected new grease in the "ball in sockets" ends, and a bit of oil on the cylinder itself, in case it was the sealing joint, but no : it definitely comes from within the axis 2 assembly.
Could it be the brakes scratching ? The sealing joints rubbing on the aluminium of the frame ? Worse ?
On large movements, it even makes a Chewbacca sound