Not sure if this has ever been asked (didn’t find anything in a quick search). I have been having on-and-off issues with the common problem of having extrusion quit in the middle of a print due to the hobbed bolt stripping the filament. I’ve gone through a lot of adjustments to try to address this, and generally have the problem minimized.
However, I had a print going last night, and this morning extrusion had quit and the filament was stripped again. What I noticed for the first time, though, was that the idler tension knobs seemed to have loosened considerably from where I had set them yesterday morning. FYI, I had loaded the filament yesterday morning, tightened the knobs, and did a number of successful shorter prints throughout the day.
So, now I am wondering if my problems in this area are due to the idler tension knobs slowly working their way loose over the course of several prints. I have not seen any discussion of this anywhere. Has anybody else noticed this happening? If so, have you noticed any correlation with stripped filament? And, more importantly, have you come up with any solution to keep the knobs from working loose?