Here's my situation: As of two nights ago, I was able to image for 10+ minutes without guiding - no trails, round stars. I had meticulously hand-balanced the mount on both axes in multiple configurations - afterward, with motor off, nudging the mount to move in both axes resulted in smooth and effortless movement in all directions, stopping with no telltale off-balance movement. Come last night, with no changes to the setup, the mount vibrates intermittently and creates disturbing sound effects. Checking the balance, all is well, no change from my earlier remarks.
I have tried to use the balance function before, but when the bars are aligned the system is seriously out of balance in all positions. Admittedly, I am still a novice at this and may not be performing the Servo balance function properly - my results certainly support that. Any help in resolving my "in balance" out of balance would be appreciated.